1,238 community and non-transient non-community water systems are listed for Colorado in EPA SDWIS. 165 were sampled under UCMR 5; 39 of those had at least one PFAS result at or above the reporting level, and 15 had a highest single result at or above a 2024 EPA limit (PFOA or PFOS 4 ppt, or Hazard Index 1).
Colorado map · Download: systems (CSV) · all results (CSV, gzip)
These are monitoring results collected under EPA's Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) at entry points, where treated water enters the distribution system; they are not tap-water samples. They are not compliance determinations: compliance with EPA's 2024 PFAS limits is judged on running annual averages of compliance monitoring, required from 2029, so a single UCMR 5 result at or above a limit is not a violation. “< MRL” means the compound was not quantified at EPA's minimum reporting level; it does not mean zero.
Sampled under UCMR 5 (165)
| System | PWSID | City | Population | Highest PFOA (ppt) | Highest PFOS (ppt) | Highest HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Advenir French Quarter | CO0116104 | Lakewood | 3,447 | <MRL | <MRL | 0 | No PFAS detected |
| Alamosa City Of | CO0102100 | Alamosa | 11,271 | <MRL | <MRL | 0 | No PFAS detected |
| Antonito Town Of | CO0111100 | Antonito | 981 | <MRL | <MRL | 0 | No PFAS detected |
| Arapahoe Cnty Wwwa | CO0203002 | Centennial | 31,000 | 4.6 | <MRL | 0.003 | PFOA 1–3 × its limit |
| Arvada City Of | CO0130001 | Arvada | 171,610 | <MRL | <MRL | 0 | No PFAS detected |
| Aspen City Of | CO0149122 | Aspen | 31,100 | <MRL | <MRL | 0 | No PFAS detected |
| Aurora City Of | CO0103005 | Aurora | 533,407 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Battlement Mesa Md | CO0123133 | Parachute | 4,100 | <MRL | <MRL | 0 | No PFAS detected |
| Berthoud Town Of | CO0135138 | Berthoud | 14,211 | <MRL | <MRL | 0 | No PFAS detected |
| Black Hawk City Of | CO0124147 | Black Hawk | 15,167 | <MRL | <MRL | 0 | No PFAS detected |
| Boulder City Of | CO0107152 | Boulder | 166,080 | <MRL | <MRL | 0 | No PFAS detected |
| Breckenridge Town Of | CO0159020 | Breckenridge | 28,315 | <MRL | <MRL | 0 | No PFAS detected |
| Brighton City Of | CO0101025 | Brighton | 56,304 | 5.3 | 10.6 | 0.714 | PFOS 1–3 × its limit |
| Broomfield City And County Of | CO0107155 | Broomfield | 106,153 | <MRL | <MRL | 0 | No PFAS detected |
| Brush City Of | CO0144001 | Hillrose | 5,122 | <MRL | <MRL | 0 | No PFAS detected |
| Buena Vista Town Of | CO0108300 | Buena Vista | 3,776 | <MRL | <MRL | 0 | No PFAS detected |
| Burlington City Of | CO0132005 | Burlington | 3,720 | <MRL | <MRL | 0 | No PFAS detected |
| Canon City City Of | CO0122100 | Canon City | 34,800 | <MRL | <MRL | 0 | No PFAS detected |
| Carbondale Town Of | CO0123167 | Carbondale | 6,700 | <MRL | <MRL | 0 | No PFAS detected |
| Castle Pines North Md | CO0118006 | Castle Pines | 12,800 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Castle Pines Village Md | CO0118005 | Castle Rock | 5,656 | <MRL | <MRL | 0 | No PFAS detected |
| Castle Rock Town Of | CO0118010 | Castle Rock | 110,298 | <MRL | <MRL | 0 | Other PFAS detected |
| Central City City Of | CO0124171 | Central City | 3,750 | <MRL | <MRL | 0 | No PFAS detected |
| Central Weld Cnty Wd | CO0162122 | Greeley | 7,662 | <MRL | <MRL | 0 | No PFAS detected |
| Cherokee Md | CO0121125 | Colorado Springs | 29,610 | 6.1 | <MRL | 0.004 | PFOA 1–3 × its limit |
| Chipeta Wd | CO0143176 | Montrose | 3,802 | <MRL | <MRL | 0 | Other PFAS detected |
| Clifton Wd | CO0139180 | Clifton | 34,500 | <MRL | <MRL | 0 | No PFAS detected |
| Clock Tower Center | CO0218099 | Lakewood | 560 | <MRL | <MRL | 0 | No PFAS detected |
| Colorado Centre Md | CO0121140 | Colorado Springs | 3,675 | <MRL | <MRL | 0 | No PFAS detected |
| Colorado Springs Utilities | CO0121150 | Colorado Springs | 464,111 | <MRL | <MRL | 0 | No PFAS detected |
| Consolidated Mutual Maple Grove | CO0130020 | Lakewood | 81,400 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Consolidated Mutual Water Company | CO0130145 | Lakewood | 54,669 | <MRL | <MRL | 0 | No PFAS detected |
| Copper Mountain Consolidated Md | CO0159030 | Copper Mountain | 5,785 | <MRL | <MRL | 0 | No PFAS detected |
| Cortez City Of | CO0142200 | Cortez | 8,770 | <MRL | <MRL | 0 | No PFAS detected |
| Cottonwood Wsd | CO0118020 | Englewood | 10,867 | 4 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Craig City Of | CO0141188 | Craig | 8,930 | <MRL | <MRL | 0 | No PFAS detected |
| Crawford Mesa Wa | CO0115189 | Crawford | 486 | <MRL | <MRL | 0 | No PFAS detected |
| Creede City Of | CO0140500 | Creede | 1,965 | <MRL | <MRL | 0 | No PFAS detected |
| Csu Foothills Campus | CO0235182 | Fort Collins | 4,483 | <MRL | <MRL | 0 | Other PFAS detected |
| Csu Main And West Housing Campus | CO0235184 | Fort Collins | 27,375 | <MRL | <MRL | 0 | No PFAS detected |
| Csu South Campus | CO0235181 | Fort Collins | 5,164 | <MRL | <MRL | 0 | No PFAS detected |
| Dacono City Of | CO0162200 | Dacono | 6,900 | <MRL | <MRL | 0 | No PFAS detected |
| Delta City Of | CO0115205 | Delta | 8,700 | <MRL | <MRL | 0 | Other PFAS detected |
| Denver Water Board | CO0116001 | Denver | 1,287,000 | <MRL | <MRL | 0 | No PFAS detected |
| Dolores Town Of | CO0142400 | Dolores | 1,626 | <MRL | <MRL | 0 | No PFAS detected |
| Donala Wsd | CO0121175 | Colorado Springs | 6,421 | <MRL | <MRL | 0 | No PFAS detected |
| Durango City Of | CO0134150 | Durango | 33,787 | <MRL | <MRL | 0 | No PFAS detected |
| Eagle River Wsd | CO0119802 | Vail | 51,515 | <MRL | <MRL | 0 | No PFAS detected |
| Eagle Town Of | CO0119233 | Eagle | 7,511 | <MRL | <MRL | 0 | No PFAS detected |
| East Cherry Creek Valley Wsd | CO0103035 | Aurora | 66,130 | <MRL | <MRL | 0 | Other PFAS detected |
| East Larimer County Wd | CO0135233 | Fort Collins | 27,944 | <MRL | <MRL | 0 | No PFAS detected |
| Eaton Town Of | CO0162233 | Eaton | 7,328 | <MRL | <MRL | 0 | No PFAS detected |
| Eldora Mountain Resort | CO0207466 | Nederland | 2,400 | <MRL | <MRL | 0 | No PFAS detected |
| Englewood City Of | CO0103045 | Englewood | 59,904 | 4 | <MRL | 0.003 | PFOA 1–3 × its limit |
| Erie Town Of | CO0162255 | Erie | 47,444 | <MRL | <MRL | 0 | No PFAS detected |
| Estes Park Town Of | CO0135257 | Estes Park | 16,722 | <MRL | <MRL | 0 | No PFAS detected |
| Evans City Of | CO0162260 | Evans | 19,369 | <MRL | <MRL | 0 | No PFAS detected |
| Evergreen Md | CO0130030 | Evergreen | 15,750 | <MRL | <MRL | 0 | No PFAS detected |
| Federal Heights City Of | CO0101055 | Federal Heights | 11,678 | <MRL | <MRL | 0 | No PFAS detected |
| Firestone Town Of | CO0162476 | Firestone | 27,798 | <MRL | <MRL | 0 | No PFAS detected |
| Florence City Of | CO0122500 | Florence | 7,500 | <MRL | <MRL | 0 | No PFAS detected |
| Fountain City Of | CO0121275 | Fountain | 25,130 | <MRL | <MRL | 0 | Other PFAS detected |
| Frederick Town Of | CO0162288 | Frederick | 17,173 | <MRL | <MRL | 0 | No PFAS detected |
| Frisco Town Of | CO0159055 | Frisco | 4,495 | <MRL | <MRL | 0 | No PFAS detected |
| Ft Collins City Of | CO0135291 | Fort Collins | 179,901 | <MRL | <MRL | 0 | No PFAS detected |
| Ft Collins Loveland Wd | CO0135292 | Fort Collins | 63,532 | <MRL | <MRL | 0 | No PFAS detected |
| Ft Lupton City Of | CO0162291 | Fort Lupton | 12,099 | <MRL | <MRL | 0 | No PFAS detected |
| Ft Morgan City Of | CO0144005 | Fort Morgan | 12,000 | <MRL | <MRL | 0 | No PFAS detected |
| Genesee Wsd | CO0130035 | Golden | 3,920 | <MRL | <MRL | 0 | No PFAS detected |
| Glenwood Springs City Of | CO0123314 | Glenwood Springs | 9,428 | <MRL | <MRL | 0 | No PFAS detected |
| Golden City Of | CO0130040 | Golden | 38,288 | <MRL | <MRL | 0 | No PFAS detected |
| Golden Terrace West | CO0130319 | Wheat Ridge | 825 | <MRL | <MRL | 0 | No PFAS detected |
| Grand County Water No 1 | CO0125323 | Winter Park | 5,400 | <MRL | <MRL | 0 | Other PFAS detected |
| Grand Junction City Of | CO0139321 | Grand Junction | 26,000 | <MRL | <MRL | 0 | No PFAS detected |
| Greeley City Of | CO0162321 | Greeley | 132,310 | <MRL | <MRL | 0 | No PFAS detected |
| Gunnison City Of | CO0126325 | Gunnison | 9,610 | <MRL | 4.2 | 0.002 | PFOS 1–3 × its limit |
| Gypsum Town Of | CO0119329 | Gypsum | 15,272 | <MRL | <MRL | 0 | No PFAS detected |
| Hayden Town Of | CO0154333 | Hayden | 3,982 | <MRL | <MRL | 0 | No PFAS detected |
| Highlands Ranch Wsd | CO0118015 | Highlands Ranch | 103,444 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Hudson Town Of | CO0162359 | Hudson | 3,350 | <MRL | <MRL | 0 | No PFAS detected |
| Idaho Springs City Of | CO0110020 | Idaho Springs | 10,432 | <MRL | <MRL | 0 | No PFAS detected |
| Inverness Wsd | CO0203012 | Englewood | 8,140 | <MRL | <MRL | 0 | Other PFAS detected |
| Johnstown Town Of | CO0162418 | Johnstown | 27,295 | <MRL | <MRL | 0 | No PFAS detected |
| La Junta City Of | CO0145420 | La Junta | 8,320 | <MRL | <MRL | 0 | No PFAS detected |
| Lafayette City Of | CO0107473 | Lafayette | 28,700 | <MRL | <MRL | 0 | No PFAS detected |
| Lamar City Of | CO0150700 | Lamar | 7,500 | <MRL | <MRL | 0.332 | Hazard Index below its limit |
| Left Hand Wd | CO0107471 | Niwot | 20,280 | <MRL | <MRL | 0 | No PFAS detected |
| Limon Town Of | CO0137015 | Limon | 5,080 | <MRL | <MRL | 0 | No PFAS detected |
| Little Thompson Wd | CO0135477 | Berthoud | 25,654 | 4.8 | <MRL | 0 | PFOA 1–3 × its limit |
| Lochbuie Town Of | CO0162486 | Lochbuie | 6,518 | <MRL | <MRL | 0.302 | Hazard Index below its limit |
| Longmont City Of | CO0107485 | Longmont | 104,178 | <MRL | <MRL | 0 | No PFAS detected |
| Louisville City Of | CO0107487 | Louisville | 20,975 | <MRL | <MRL | 0 | No PFAS detected |
| Loveland City Of | CO0135485 | Loveland | 91,077 | <MRL | <MRL | 0 | No PFAS detected |
| Manitou Springs City Of | CO0121450 | Manitou Springs | 6,938 | <MRL | <MRL | 0 | No PFAS detected |
| Menoken Wd | CO0143506 | Montrose | 4,500 | <MRL | <MRL | 0 | No PFAS detected |
| Meridian Md | CO0218015 | Englewood | 23,415 | <MRL | <MRL | 0 | No PFAS detected |
| Meridian Service Md | CO0121455 | Peyton | 12,760 | <MRL | <MRL | 0 | No PFAS detected |
| Mid Valley Md | CO0119508 | Carbondale | 4,588 | <MRL | <MRL | 0 | No PFAS detected |
| Milliken Town Of | CO0162511 | Milliken | 9,200 | <MRL | <MRL | 0 | No PFAS detected |
| Monte Vista City Of | CO0153600 | Monte Vista | 4,600 | <MRL | <MRL | 0 | No PFAS detected |
| Montezuma Wc | CO0142900 | Dolores | 13,797 | <MRL | <MRL | 0 | No PFAS detected |
| Montrose City Of | CO0143518 | Montrose | 19,305 | <MRL | <MRL | 0 | No PFAS detected |
| Monument Town Of | CO0121475 | Monument | 5,740 | <MRL | <MRL | 0 | No PFAS detected |
| Morgan County Quality Wd | CO0144020 | Fort Morgan | 8,116 | <MRL | <MRL | 0 | No PFAS detected |
| Morrison Town Of | CO0130085 | Morrison | 9,887 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Mountain Village Town Of | CO0157400 | Redvale | 9,700 | <MRL | 7.5 | 0.81 | PFOS 1–3 × its limit |
| Mt Werner Wd | CO0154524 | Steamboat Springs | 19,000 | <MRL | <MRL | 0 | No PFAS detected |
| Navajo River Ranch Poa | CO0104533 | Pagosa Springs | 40 | <MRL | <MRL | 0 | No PFAS detected |
| New Castle Town Of | CO0123538 | New Castle | 5,024 | <MRL | <MRL | 0 | No PFAS detected |
| North Holbrook Wc | CO0145630 | Rocky Ford | 58 | <MRL | <MRL | 0 | No PFAS detected |
| North Table Mountain Wsd | CO0130105 | Golden | 10,000 | <MRL | <MRL | 0 | No PFAS detected |
| North Weld County Wd | CO0162553 | Lucerne | 15,890 | <MRL | <MRL | 0 | No PFAS detected |
| Northern Colorado Wa | CO0135554 | Wellington | 4,675 | <MRL | <MRL | 0 | No PFAS detected |
| Northern Douglas County Wsd | CO0118016 | Greenwood Village | 6,160 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Northglenn City Of | CO0101115 | Northglenn | 48,927 | <MRL | <MRL | 0 | No PFAS detected |
| Pagosa Area Wsd | CO0104300 | Pagosa Springs | 11,069 | <MRL | <MRL | 0 | No PFAS detected |
| Paint Brush Hills | CO0221690 | Falcon | 4,994 | <MRL | <MRL | 0 | No PFAS detected |
| Park Center Wd | CO0122600 | Canon City | 4,000 | <MRL | <MRL | 0 | No PFAS detected |
| Parker Wsd | CO0118040 | Parker | 75,949 | 4.8 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Parkville Wd | CO0133700 | Leadville | 7,500 | <MRL | <MRL | 0 | No PFAS detected |
| Patterson Valley Wc | CO0145540 | Rocky Ford | 96 | <MRL | <MRL | 0 | No PFAS detected |
| Perry Park Wsd | CO0118045 | Larkspur | 3,890 | <MRL | <MRL | 0 | No PFAS detected |
| Pinery Wwd | CO0118025 | Parker | 12,901 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Pueblo Board Of Ww | CO0151500 | Pueblo | 114,070 | <MRL | <MRL | 0 | No PFAS detected |
| Pueblo West Md | CO0151650 | Pueblo West | 30,000 | <MRL | <MRL | 0 | No PFAS detected |
| Rifle City Of | CO0123676 | Rifle | 9,489 | <MRL | <MRL | 0 | No PFAS detected |
| Rocky Ford City Of | CO0145600 | Rocky Ford | 4,443 | <MRL | 4.1 | 0.604 | PFOS 1–3 × its limit |
| Roxborough Wsd | CO0118055 | Littleton | 13,765 | <MRL | <MRL | 0 | No PFAS detected |
| Salida City Of | CO0108700 | Salida | 5,666 | <MRL | <MRL | 0 | No PFAS detected |
| Security Water District | CO0121775 | Colorado Springs | 20,000 | <MRL | <MRL | 0 | Other PFAS detected |
| Severance Town Of | CO0162707 | Severance | 11,733 | <MRL | <MRL | 0 | No PFAS detected |
| Silverthorne Town Of | CO0159095 | Silverthorne | 8,400 | <MRL | <MRL | 0.373 | Hazard Index below its limit |
| Snake River Wd | CO0159105 | Keystone | 9,900 | 5.8 | 22 | 1.303 | PFOS ≥ 3 × its limit |
| Snowmass Village Wsd | CO0149717 | Snowmass Village | 6,353 | <MRL | <MRL | 0 | No PFAS detected |
| South Adams County Wsd | CO0101140 | Commerce City | 75,559 | <MRL | <MRL | 0 | Other PFAS detected |
| St Charles Mesa Wd | CO0151750 | Pueblo | 9,690 | <MRL | <MRL | 0 | Other PFAS detected |
| Steamboat Springs City Of | CO0154725 | Steamboat Springs | 9,950 | <MRL | <MRL | 0 | No PFAS detected |
| Sterling City Of | CO0138045 | Sterling | 15,100 | <MRL | <MRL | 0 | No PFAS detected |
| Stonegate Md | CO0118076 | Parker | 15,295 | 5.6 | 5.1 | 0.002 | PFOA 1–3 × its limit |
| Stratmoor Hills Wsd | CO0121800 | Colorado Springs | 6,500 | <MRL | <MRL | 0 | Other PFAS detected |
| Suburban Water | CO0143515 | Montrose | 859 | <MRL | <MRL | 0 | Other PFAS detected |
| Superior Md No 1 | CO0107725 | Superior | 17,900 | <MRL | <MRL | 0 | No PFAS detected |
| Telluride Town Of | CO0157800 | Telluride | 7,900 | <MRL | <MRL | 0 | No PFAS detected |
| Thornton City Of | CO0101150 | Thornton | 226,465 | 7.1 | 5 | 0.594 | PFOA 1–3 × its limit |
| Todd Creek Village Md | CO0101157 | Brighton | 7,363 | <MRL | 6.8 | 0.589 | PFOS 1–3 × its limit |
| Tri County Wcd | CO0143755 | Montrose | 20,490 | <MRL | <MRL | 0 | No PFAS detected |
| Trinidad City Of | CO0136800 | Trinidad | 11,400 | <MRL | <MRL | 0 | No PFAS detected |
| Triview Md | CO0121840 | Monument | 5,737 | <MRL | <MRL | 0 | No PFAS detected |
| Two Rivers Village | CO0119720 | Edwards | 896 | <MRL | <MRL | 0 | No PFAS detected |
| Us Air Force Academy | CO0121845 | Usaf Academy | 16,876 | <MRL | <MRL | 0 | No PFAS detected |
| Us Department Of The Army Fort Carson | CO0221445 | Fort Carson | 48,000 | <MRL | <MRL | 0 | No PFAS detected |
| Ute Wcd | CO0139791 | Grand Junction | 92,580 | <MRL | <MRL | 0 | No PFAS detected |
| Vail Assoc Midvail Eagle | CO0219800 | Vail | 7,600 | <MRL | <MRL | 0 | No PFAS detected |
| Wellington Town Of | CO0135838 | Wellington | 11,720 | <MRL | <MRL | 0 | No PFAS detected |
| West Fort Collins Wd | CO0135290 | La Porte | 4,000 | <MRL | <MRL | 0 | No PFAS detected |
| Westminster City Of | CO0101170 | Westminster | 202,078 | <MRL | <MRL | 0 | No PFAS detected |
| Widefield Wsd | CO0121900 | Colorado Springs | 27,640 | 10.5 | 15.8 | 2.848 | PFOS ≥ 3 × its limit |
| Windsor Town Of | CO0162843 | Windsor | 23,500 | <MRL | <MRL | 0 | No PFAS detected |
| Winter Park Wsd | CO0125843 | Winter Park | 6,635 | <MRL | <MRL | 0 | No PFAS detected |
| Woodland Park City Of | CO0160900 | Woodland | 8,500 | <MRL | <MRL | 0 | No PFAS detected |
| Woodmen Hills Md | CO0121930 | Falcon | 13,888 | <MRL | <MRL | 0 | No PFAS detected |
| Woodmoor Wsd | CO0121950 | Monument | 18,031 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Ymca Rockies Wind River | CO0135883 | Estes Park | 3,730 | <MRL | <MRL | 0 | No PFAS detected |
| Ymca Snow Mtn Ranch | CO0125916 | Granby | 578 | <MRL | <MRL | 0 | No PFAS detected |
| Yuma City Of | CO0163020 | Yuma | 4,049 | <MRL | <MRL | 0 | No PFAS detected |
Not tested under UCMR 5 (1,073)
UCMR 5 required monitoring by systems serving 3,300 or more people and by a representative sample of smaller systems. The systems below have no UCMR 5 results in EPA's data. Not tested is not the same as not detected: the absence of results says nothing about PFAS in their water.
| System | PWSID | Type | City | Population | Counties |
|---|---|---|---|---|---|
| 285 Business Park | CO0230355 | NTNCWS | Morrison | 46 | Jefferson County |
| 4 Way Ranch Md 2 | CO0121111 | CWS | Wheat Ridge | 150 | El Paso County |
| 96 Pipeline Co Inc | CO0113050 | CWS | Ordway | 285 | Crowley County |
| A And B Wa Inc | CO0150100 | CWS | Holly | 100 | Prowers County |
| A-Lodge Salida | CO0208480 | NTNCWS | Englewood | 98 | Chaffee County |
| Academy Wsd | CO0121025 | CWS | Castle Rock | 750 | El Paso County |
| Adams County Parks | CO0201002 | NTNCWS | Windsor | 868 | Adams County |
| Advance Mhp | CO0101104 | CWS | Tempe | 175 | Adams County |
| Aerie | CO0259018 | NTNCWS | Copper Mountain | 2,077 | Summit County |
| Agate Wa | CO0120001 | CWS | Agate | 152 | Elbert County |
| Aguilar Town Of | CO0136100 | CWS | Aguilar | 447 | Las Animas County |
| Akron Town Of | CO0161001 | CWS | Akron | 2,379 | Washington County |
| Alameda Wsd | CO0130116 | CWS | Lakewood | 2,480 | Jefferson County |
| Aldasoro Ranch Hoc | CO0157011 | CWS | Telluride | 412 | San Miguel County |
| Allenspark Wsd | CO0107115 | CWS | Allenspark | 340 | Boulder County |
| Alma Town Of | CO0147001 | CWS | Alma | 460 | Park County |
| Alpensee Wd | CO0159119 | CWS | Windsor | 168 | Summit County |
| Alpine Lakes Ranch Wc | CO0104090 | CWS | Pagosa Springs | 158 | Archuleta County |
| Alpine Mountain Ranch Md | CO0154117 | CWS | Steamboat Springs | 25 | Routt County |
| Alpine Village Mhp | CO0160050 | CWS | Englewood | 80 | Teller County |
| Alpine Vista Village | CO0135113 | CWS | Loveland | 313 | Larimer County |
| Altman Plants | CO0221114 | NTNCWS | Peyton | 188 | El Paso County |
| Amrize | CO0222700 | NTNCWS | Florence | 250 | Fremont County |
| Animas View Mhp Co-Op | CO0134117 | CWS | Durango | 292 | La Plata County |
| Animas Wc | CO0134020 | CWS | Durango | 3,096 | La Plata County |
| Annunciation Heights | CO0235185 | CWS | Estes Park | 260 | Boulder County, Larimer County |
| Antelope Hills Assoc | CO0126117 | CWS | Gunnison | 265 | Gunnison County |
| Apache Mhp | CO0134119 | CWS | Cedaredge | 120 | La Plata County |
| Apple & Cherry Ridge Village | CO0135119 | CWS | Orem | 350 | Larimer County |
| Apple Tree Park | CO0123734 | CWS | New Castle | 1,160 | Garfield County |
| Applewood Mhc | CO0138119 | CWS | New York | 250 | Logan County |
| Appogee Kazmira Llc | CO0203015 | NTNCWS | Watkins | 200 | Arapahoe County |
| Arabian Acres Md | CO0160075 | CWS | Colorado Springs | 325 | Teller County |
| Arapahoe Mhp | CO0110001 | CWS | Dumont | 27 | Clear Creek County |
| Arapahoe Wc | CO0109001 | CWS | Arapahoe | 99 | Cheyenne County |
| Arbordale Acres Mhp | CO0107118 | CWS | Lafayette | 901 | Boulder County |
| Area 420 | CO0255120 | NTNCWS | Snowmass Village | 84 | Saguache County |
| Arickaree School | CO0261002 | NTNCWS | Anton | 165 | Washington County |
| Aristocrat Ranchette Water Project | CO0162121 | CWS | Fort Lupton | 1,715 | Weld County |
| Arriba Town Of | CO0137001 | CWS | Evans | 216 | Lincoln County |
| Arrowhead Mhp | CO0121050 | CWS | Bloomfield Hills | 135 | El Paso County |
| Asgard Subdivision Wa | CO0123123 | CWS | Silt | 80 | Garfield County |
| Aspen Equestrian Blue Creek Ranch | CO0123152 | CWS | Glenwood Springs | 300 | Garfield County |
| Aspen Mesa Estates | CO0119125 | CWS | Basalt | 225 | Eagle County |
| Aspen Mtn View Subd | CO0219123 | CWS | Carbondale | 150 | Eagle County |
| Aspen Park Md | CO0230036 | NTNCWS | Wheat Ridge | 1,800 | Jefferson County |
| Aspen Park Village Ctr | CO0230090 | NTNCWS | Pine | 360 | Jefferson County |
| Aspen Ridge Mhc | CO0135122 | CWS | Aurora | 302 | Larimer County |
| Aspen Springs Md | CO0104121 | CWS | Pagosa Springs | 290 | Archuleta County |
| Aspen Terrace Mobile Park | CO0116122 | CWS | Arvada | 200 | Denver County |
| Aspen Village Md | CO0149123 | CWS | Basalt | 300 | Pitkin County |
| Ault Town Of | CO0162125 | CWS | Ault | 4,220 | Weld County |
| Avilla Eastlake | CO0101126 | CWS | Greenwood Village | 410 | Adams County |
| Avondale Wsd | CO0151050 | CWS | Avondale | 1,615 | Pueblo County |
| Baca Grande Wsd | CO0155200 | CWS | Crestone | 2,006 | Saguache County |
| Bailey Wsd | CO0147010 | CWS | Bailey | 483 | Park County |
| Bancroft Clover Wsd | CO0130133 | CWS | Lakewood | 44,000 | Jefferson County |
| Barr Lake Rvp | CO0201006 | CWS | Wheat Ridge | 204 | Adams County |
| Basalt Town Of | CO0119134 | CWS | Basalt | 2,357 | Eagle County, Pitkin County |
| Baseline Wd | CO0107135 | CWS | Boulder | 820 | Boulder County |
| Baxter Water And Services | CO0151400 | CWS | Pueblo | 350 | Pueblo County |
| Bayfield Town Of | CO0134030 | CWS | Bayfield | 2,300 | La Plata County |
| Bear Creek Loa | CO0214142 | CWS | Antonito | 190 | Conejos County |
| Bear Creek Wsd | CO0130138 | CWS | Lakewood | 30,000 | Jefferson County |
| Bearly Tawl Day Care | CO0210100 | NTNCWS | Evergreen | 48 | Clear Creek County |
| Beehive Water Association | CO0145030 | CWS | Cheraw | 154 | Otero County |
| Bella Vista | CO0162138 | CWS | Lakewood | 131 | Weld County |
| Belleview Christian College | CO0101015 | CWS | Westminster | 460 | Adams County |
| Bellyache Ridge Md | CO0119139 | CWS | Wolcott | 257 | Eagle County |
| Benet Hill Monastery | CO0221138 | NTNCWS | Colorado Springs | 123 | El Paso County |
| Bennett Town Of | CO0101020 | CWS | Bennett | 4,400 | Adams County, Arapahoe County |
| Bents Fort Wc | CO0145060 | CWS | La Junta | 900 | Otero County |
| Bethune Town Of | CO0132001 | CWS | Bethune | 195 | Kit Carson County |
| Beulah Water Works District | CO0151100 | CWS | Beulah | 445 | Pueblo County |
| Beverly Hills Mutual Wc | CO0118001 | CWS | Castle Rock | 325 | Douglas County |
| Big Elk Meadows Wa | CO0135143 | CWS | Ft Morgan | 405 | Larimer County |
| Big Pines Campground | CO0221060 | CWS | Woodland Park | 72 | El Paso County |
| Billings Mhp | CO0123467 | CWS | Boise | 110 | Garfield County |
| Black Canyon Estates Mhp | CO0143134 | CWS | York | 188 | Montrose County |
| Blanca Forestry Products | CO0212199 | NTNCWS | Blanca | 50 | Costilla County |
| Blanca Town Of | CO0112100 | CWS | Blanca | 469 | Costilla County |
| Blue Leaf School Llc | CO0207192 | NTNCWS | Wheat Ridge | 65 | Boulder County |
| Blue Mountain Wd | CO0130005 | CWS | Wheat Ridge | 350 | Jefferson County |
| Blue River Valley Ranch Lakes | CO0159005 | CWS | Silverthorne | 150 | Summit County |
| Blue Sky Ranch Inc Assoc Of Owners | CO0134065 | CWS | Durango | 180 | La Plata County |
| Blue Valley Md | CO0125148 | CWS | Kremmling | 410 | Grand County |
| Bobcat Meadows Md | CO0121060 | CWS | Woodland Park | 470 | El Paso County |
| Bone Mesa Domestic Wd | CO0115152 | CWS | Paonia | 400 | Delta County |
| Bonvue Water And Sanitation District | CO0130152 | CWS | Lakewood | 350 | Jefferson County |
| Boone Town Of | CO0151150 | CWS | Boone | 263 | Pueblo County |
| Boulder Meadows Mhp | CO0107179 | CWS | Windsor | 1,657 | Boulder County |
| Boulder Ridge Mhp | CO0107153 | CWS | Lafayette | 897 | Boulder County |
| Bow Mar Wsd | CO0103153 | CWS | Littleton | 899 | Arapahoe County, Jefferson County |
| Branson Town Of | CO0136300 | CWS | Branson | 131 | Las Animas County |
| Briggsdale School | CO0262155 | NTNCWS | Windsor | 194 | Weld County |
| Briggsdale Wc | CO0162155 | CWS | Briggsdale | 303 | Weld County |
| Brighton Village Llc | CO0101030 | CWS | Windsor | 77 | Adams County |
| Bristol Wsd | CO0150200 | CWS | Bristol | 151 | Prowers County |
| Britanie Ridge Ws | CO0120153 | CWS | Elizabeth | 245 | Elbert County |
| Brook Forest Wd | CO0130010 | CWS | Highlands Ranch | 998 | Jefferson County |
| Brookside Town Of | CO0122050 | CWS | Brookside | 438 | Fremont County |
| Brush Creek Wd | CO0149155 | CWS | Aspen | 516 | Pitkin County |
| Buckhorn Ranch Ws | CO0126158 | CWS | Crested Butte | 205 | Gunnison County |
| Buckskin Valley Subdivision | CO0252160 | CWS | Meeker | 28 | Rio Blanco County |
| Buena Vista Correctional Facility | CO0108350 | CWS | Buena Vista | 1,700 | Chaffee County |
| Buffalo Creek Wd | CO0130015 | CWS | Buffalo Creek | 125 | Jefferson County |
| Buffalo Mountain Md | CO0159025 | CWS | Silverthorne | 2,650 | Summit County |
| Buffalo Ridge Estates | CO0162159 | CWS | Wheat Ridge | 90 | Weld County |
| Buttermilk Md | CO0149160 | CWS | Basalt | 200 | Pitkin County |
| Byers Wsd | CO0103010 | CWS | Byers | 1,000 | Arapahoe County |
| C Lazy U Ranch | CO0225167 | NTNCWS | Granby | 251 | Grand County |
| Calhan Town Of | CO0121075 | CWS | Calhan | 780 | El Paso County |
| Caliche School | CO0238002 | NTNCWS | Windsor | 350 | Logan County |
| Callicotte Ranch | CO0123617 | CWS | Glenwood Springs | 33 | Garfield County |
| Camelot Property Owners Assoc | CO0121080 | CWS | Colorado Springs | 60 | El Paso County |
| Campo Town Of | CO0105100 | CWS | Campo | 150 | Baca County |
| Candlewood Park | CO0139166 | CWS | Clifton | 800 | Mesa County |
| Canon City Mhp And Self Storage | CO0122167 | CWS | York | 166 | Fremont County |
| Canterbury Park | CO0121167 | CWS | Lakewood | 1,240 | El Paso County |
| Canyon Creek Estates | CO0123155 | CWS | Glenwood Springs | 140 | Garfield County |
| Canyon Ridge | CO0121168 | CWS | Lakewood | 625 | El Paso County |
| Capulin Wd | CO0111200 | CWS | La Jara | 250 | Conejos County |
| Cardinal Community Academy | CO0262170 | NTNCWS | Keenesburg | 120 | Weld County |
| Carter Lake Filter Plant | CO0135476 | CWS | Berthoud | 11 | Larimer County |
| Casa Del Rio Subd | CO0108375 | CWS | Buena Vista | 73 | Chaffee County |
| Casa Estates Mhp | CO0101167 | CWS | Westminster | 1,117 | Adams County |
| Castle Park Mhp | CO0118167 | CWS | Loveland | 191 | Douglas County |
| Castleton Center | CO0218039 | NTNCWS | Castle Rock | 500 | Douglas County |
| Castlewood Community Preschool | CO0218167 | NTNCWS | Franktown | 125 | Douglas County |
| Catamount Md Lake Property | CO0154466 | CWS | Steamboat Springs | 219 | Routt County |
| Catamount Md Ranch Property | CO0154467 | NTNCWS | Steamboat Springs | 127 | Routt County |
| Cathedral Wc | CO0115168 | CWS | Crawford | 200 | Delta County |
| Cattle Creek Wua | CO0123166 | CWS | Glenwood Springs | 47 | Garfield County |
| Cavanaugh Hills Ws | CO0101166 | CWS | Keenesburg | 286 | Adams County |
| Cave Creek | CO0162167 | CWS | Evans | 1,025 | Weld County |
| Cavern Springs Mhc, Llc | CO0123333 | CWS | Glenwood Springs | 300 | Garfield County |
| Cd Water | CO0213170 | NTNCWS | Ordway | 89 | Crowley County |
| Cdot Eisenhower Johnson Tunnel | CO0210009 | NTNCWS | Idaho Springs | 50 | Clear Creek County |
| Cedar Mountain Village Mhp | CO0141171 | CWS | Cedaredge | 475 | Moffat County |
| Cedar Village Mhp | CO0103171 | CWS | Littleton | 130 | Arapahoe County |
| Cedaredge Town Of | CO0115171 | CWS | Cedaredge | 2,400 | Delta County |
| Ceesi | CO0262171 | NTNCWS | Windsor | 30 | Weld County |
| Centauri Hs Centauri Ms | CO0211025 | NTNCWS | La Jara | 700 | Conejos County |
| Center Town Of | CO0155500 | CWS | Center | 2,575 | Rio Grande County, Saguache County |
| Central Manufactured Home Community | CO0122175 | CWS | Orlando | 93 | Fremont County |
| Chair Mtn Ranch Hoa Filing 1 | CO0126175 | CWS | Carbondale | 37 | Gunnison County |
| Chancellors Mhc | CO0121174 | CWS | Pueblo | 100 | El Paso County |
| Chaparral Village Mhp | CO0101078 | CWS | Centennial | 303 | Adams County |
| Chateau Chaparrel Cg | CO0208200 | CWS | Nathrop | 240 | Chaffee County |
| Chatfield South Wd | CO0118175 | CWS | Denver | 312 | Douglas County |
| Chemical Materials Activity West | CO0151600 | NTNCWS | Pueblo | 3,000 | Pueblo County |
| Cheraw Town Of | CO0145090 | CWS | Cheraw | 254 | Otero County |
| Cherry Acres Mhp | CO0115175 | CWS | Cedaredge | 95 | Delta County |
| Cherry Creek Valley Wsd | CO0116175 | CWS | Denver | 22,000 | Arapahoe County, Denver County |
| Cherry Creek Village Wd | CO0103176 | CWS | Greenwood Village | 9,215 | Arapahoe County |
| Cherry Valley Elem School | CO0218003 | NTNCWS | Castle Rock | 60 | Douglas County |
| Cheyenne Mountain Estates Mhp | CO0121176 | CWS | Lafayette | 472 | El Paso County |
| Cheyenne Mountain Space Force Station | CO0221205 | NTNCWS | Colorado Springs | 700 | El Paso County |
| Cheyenne Wells Town Of | CO0109006 | CWS | Cheyenne Wells | 840 | Cheyenne County |
| Chicosa Water Users Association | CO0136175 | CWS | Trinidad | 40 | Las Animas County |
| Childrens Discovery Ranch | CO0208174 | NTNCWS | Salida | 90 | Chaffee County |
| Church Of Eternal Hills | CO0225177 | NTNCWS | Tabernash | 245 | Grand County |
| Cimarron Creek | CO0143177 | CWS | Montrose | 560 | Montrose County |
| Cimarron Village | CO0180175 | CWS | Wheat Ridge | 1,010 | Broomfield County |
| City Of Aurora At Front Range Airport | CO0201291 | NTNCWS | Aurora | 0 | Adams County |
| Clearwater Md | CO0120003 | CWS | Highlands Ranch | 200 | Elbert County |
| Climax Climax Mine | CO0233300 | NTNCWS | Empire | 615 | Lake County |
| Climax Henderson Mine | CO0210001 | NTNCWS | Empire | 300 | Clear Creek County |
| Climax Molybdenum Co Henderson Mill | CO0225116 | NTNCWS | Empire | 165 | Grand County |
| Cloverleaf Colorado Llc | CO0135184 | CWS | Windsor | 1,007 | Larimer County |
| Coal Creek Elementary | CO0230013 | NTNCWS | Lakewood | 150 | Jefferson County |
| Coal Creek Town Of | CO0122250 | CWS | Coal Creek | 350 | Fremont County |
| Coalby Domestic Wc | CO0115185 | CWS | Cedaredge | 239 | Delta County |
| Cokedale Town Of | CO0136185 | CWS | Cokedale | 120 | Las Animas County |
| Collbran Town Of | CO0139185 | CWS | Collbran | 678 | Mesa County |
| Collins Aire Mhc | CO0135186 | CWS | Aurora | 946 | Larimer County |
| Colorado Air And Space Port | CO0201288 | NTNCWS | Windsor | 140 | Adams County |
| Colorado City Md | CO0151200 | CWS | Colorado City | 2,755 | Pueblo County |
| Colorado Mtn College Svc | CO0123170 | CWS | Glenwood Springs | 715 | Garfield County |
| Colowyo Coal Company | CO0241186 | NTNCWS | Meeker | 500 | Moffat County |
| Columbine Lake Wsd | CO0125155 | CWS | Grand Lake | 428 | Grand County |
| Columbine Lakes Hoa | CO0103183 | CWS | Littleton | 843 | Arapahoe County |
| Commerce Heights | CO0101001 | CWS | Lakewood | 130 | Adams County |
| Compass Aspen Community School | CO0249133 | NTNCWS | Glenwood Springs | 181 | Pitkin County |
| Conejos County Courthouse | CO0211185 | NTNCWS | Conejos | 84 | Conejos County |
| Conifer High School | CO0230225 | NTNCWS | Lakewood | 2,350 | Jefferson County |
| Conifer Md | CO0130184 | NTNCWS | Greenwood Village | 525 | Jefferson County |
| Conifer Wa | CO0230019 | NTNCWS | Lakewood | 550 | Jefferson County |
| Consolidated Bell Mtn Ranch Md | CO0118002 | CWS | Castle Rock | 1,162 | Douglas County |
| Consolidated Glacier View Meadows Assoc | CO0135315 | CWS | Livermore | 395 | Larimer County |
| Copeland Enterprises, Inc. | CO0201183 | NTNCWS | Wheat Ridge | 104 | Adams County |
| Copper Key Village Mhp | CO0162186 | CWS | Fort Lupton | 260 | Weld County |
| Core Electric Cooperative | CO0218011 | NTNCWS | Sedalia | 81 | Douglas County |
| Costilla County Ws | CO0112300 | CWS | San Luis | 561 | Costilla County |
| Cotopaxi School | CO0222230 | NTNCWS | Cotopaxi | 294 | Fremont County |
| Cottonwood Mhp | CO0101035 | CWS | Vancouver | 60 | Adams County |
| Cottonwood Springs Mhp | CO0123185 | CWS | Rifle | 750 | Garfield County |
| Country Estates Mobile Home Park | CO0162187 | CWS | Lakewood | 297 | Weld County |
| Country Gardens Mhp | CO0103025 | CWS | Strasburg | 115 | Arapahoe County |
| Country Homes Land Co | CO0103186 | CWS | Denver | 100 | Arapahoe County |
| Countryside Estates Pueblo | CO0151186 | CWS | Pueblo | 508 | Pueblo County |
| Countryside Of Greeley | CO0162185 | CWS | Lakewood | 435 | Weld County |
| Countryside Of Longmont | CO0107184 | CWS | Lakewood | 775 | Boulder County |
| Countryside Village Of Denver | CO0101185 | CWS | Lakewood | 863 | Adams County |
| Coyote Hills Ws | CO0120184 | CWS | Elizabeth | 84 | Douglas County, Elbert County |
| Cragmont Wc | CO0130187 | CWS | Evergreen | 50 | Jefferson County |
| Crawford Town Of | CO0115188 | CWS | Crawford | 477 | Delta County |
| Creekside South Estates Metro District | CO0101188 | CWS | Lakewood | 160 | Adams County |
| Crest Mobile Estates Mhp | CO0121190 | CWS | Prairie Village | 100 | El Paso County |
| Crested Butte South | CO0126189 | CWS | Crested Butte | 2,000 | Gunnison County |
| Crested Butte Town Of | CO0126188 | CWS | Crested Butte | 2,440 | Gunnison County |
| Crestline Manor | CO0121188 | CWS | Lakewood | 505 | El Paso County |
| Crestone Ws | CO0155188 | CWS | Crestone | 293 | Saguache County |
| Crestview Wsd | CO0101040 | CWS | Denver | 23,756 | Adams County |
| Crestwood Estates | CO0101187 | CWS | Hudson | 140 | Adams County |
| Cripple Creek City Of | CO0160100 | CWS | Cripple Creek | 2,817 | Teller County |
| Crook Town Of | CO0138005 | CWS | Crook | 182 | Logan County |
| Cross L Estates | CO0152188 | CWS | Meeker | 50 | Rio Blanco County |
| Crowley County Wa | CO0113100 | CWS | Ordway | 530 | Crowley County |
| Crowley County Ws | CO0113200 | CWS | Ordway | 0 | Crowley County |
| Crowley Ranch Reserve | CO0104393 | CWS | Chromo | 49 | Archuleta County |
| Crowley Town Of | CO0113300 | CWS | Ordway | 188 | Crowley County |
| Crystal Lakes 11Th Filing | CO0235189 | NTNCWS | Red Feather Lakes | 76 | Larimer County |
| Crystal River Country Estates Water Co | CO0149188 | CWS | Carbondale | 40 | Pitkin County |
| Crystal Valley | CO0123188 | CWS | Carbondale | 100 | Garfield County |
| Cslb 41149 Us 6 | CO0219170 | NTNCWS | Windsor | 76 | Eagle County |
| Cucharas Sanitation And Water District | CO0128100 | CWS | La Veta | 343 | Huerfano County |
| Curecanti Nra Elk Creek | CO0326003 | NTNCWS | Montrose | 206 | Gunnison County |
| Dakota Ridge Hoa | CO0154200 | CWS | Steamboat Springs | 130 | Routt County |
| Dallas Creek Wc | CO0146485 | CWS | Montrose | 1,059 | Ouray County |
| Dallas Meadows Community Assoc | CO0246201 | CWS | Lafayette | 120 | Ouray County |
| Debeque Town Of | CO0139205 | CWS | Debeque | 911 | Mesa County |
| Deep Creek Creede Haven | CO0140600 | CWS | Denver | 86 | Mineral County |
| Deep Creek Mountain Valley Estates | CO0140187 | CWS | Denver | 31 | Mineral County |
| Deer Creek Md | CO0247205 | NTNCWS | Bailey | 662 | Park County |
| Deer Creek Wd | CO0120246 | CWS | Wheat Ridge | 792 | Elbert County |
| Deer Trail Town Of | CO0103030 | CWS | Deer Trail | 1,648 | Arapahoe County |
| Deerwood Service Company Llc | CO0154205 | CWS | Steamboat Springs | 91 | Routt County |
| Del Norte Town Of | CO0153200 | CWS | Del Norte | 1,429 | Rio Grande County |
| Denver Cascade Mhp | CO0101205 | CWS | Wheat Ridge | 1,200 | Adams County |
| Derby Village Mobile Home Park | CO0101201 | CWS | Windsor | 81 | Adams County |
| Deserado Mine | CO0252838 | NTNCWS | Meeker | 175 | Rio Blanco County |
| Deutsch Domestic Water | CO0215225 | CWS | Crawford | 246 | Delta County |
| Devils Thumb Ranch Resort | CO0225205 | NTNCWS | Tabernash | 451 | Grand County |
| Dillon Town Of | CO0159035 | CWS | Dillon | 3,254 | Summit County |
| Dillon Valley District | CO0159040 | CWS | Dillon | 3,063 | Summit County |
| Dinosaur Natl Mnt Hdqtrs | CO0241200 | NTNCWS | Dinosaur | 55 | Moffat County |
| Dinosaur Town Of | CO0141210 | CWS | Dinosaur | 350 | Moffat County |
| Directv Broadcast Facility | CO0218210 | NTNCWS | Castle Rock | 200 | Douglas County |
| Divide Mpc Md No 1 | CO0160295 | CWS | Divide | 679 | Teller County |
| Divide South | CO0160275 | CWS | Divide | 74 | Teller County |
| Divide Water Providers Inc | CO0160195 | CWS | Divide | 570 | Teller County |
| Dominion Wsd | CO0118021 | CWS | Greenwood Village | 0 | Douglas County |
| Dot Mhp | CO0119501 | CWS | Irvine | 229 | Eagle County |
| Dove Creek Town Of | CO0117300 | CWS | Dove Creek | 850 | Dolores County |
| Dunton Hot Springs Inc | CO0217300 | NTNCWS | Dolores | 47 | Dolores County |
| Durango 9 R Florida Mesa School | CO0234380 | NTNCWS | Durango | 410 | La Plata County |
| Durango 9R Sunnyside Elementary School | CO0234820 | NTNCWS | Durango | 192 | La Plata County |
| Durango Falfa Mhc Llc | CO0134225 | CWS | Durango | 40 | La Plata County |
| Durango Jcmhp, Llc | CO0134510 | CWS | Durango | 100 | La Plata County |
| Durango La Plata Airport | CO0234480 | NTNCWS | Durango | 780 | La Plata County |
| Durango North Village | CO0134176 | CWS | Durango | 150 | La Plata County |
| Durango Regency Mhp | CO0134390 | CWS | Durango | 200 | La Plata County |
| Durango West Md No 1 | CO0134180 | CWS | Durango | 750 | La Plata County |
| Durango West Md No 2 | CO0134190 | CWS | Durango | 930 | La Plata County |
| E And C Precast Concrete Inc | CO0218233 | NTNCWS | Castle Rock | 35 | Douglas County |
| E-470 Water System - Plaza D | CO0201234 | NTNCWS | Aurora | 25 | Adams County |
| Eads Town Of | CO0131400 | CWS | Eads | 656 | Kiowa County |
| Eagle Crest Mhp | CO0162234 | CWS | Firestone | 441 | Weld County |
| Eagle River Village Mhp | CO0119234 | CWS | Littleton | 1,500 | Eagle County |
| Eagles Watch Hoa | CO0129233 | CWS | Walden | 83 | Jackson County |
| Earles Subdivision Wc | CO0143233 | CWS | Montrose | 40 | Montrose County |
| East Alamosa | CO0102200 | CWS | Conejos | 1,453 | Alamosa County |
| East Boulder County Wd | CO0107236 | CWS | Boulder | 300 | Boulder County |
| East Dillon Wd | CO0159045 | CWS | Dillon | 2,501 | Summit County |
| East End Wa | CO0145120 | CWS | La Junta | 70 | Otero County |
| East Florence Wa | CO0122450 | CWS | Florence | 326 | Fremont County |
| East Valley Md | CO0103040 | CWS | Parker | 230 | Arapahoe County |
| Eastern Adams Co Md | CO0101234 | CWS | Denver | 2,485 | Adams County |
| Eastern Service Center | CO0203233 | NTNCWS | Centennial | 30 | Arapahoe County |
| Eastgate Village Manufactured Homes | CO0101034 | CWS | Farmington | 1,500 | Adams County |
| Eastside Mhp | CO0108800 | CWS | Salida | 40 | Chaffee County |
| Easy Water Llc | CO0234234 | CWS | Hesperus | 154 | La Plata County |
| Eckley Town Of | CO0163001 | CWS | Eckley | 235 | Yuma County |
| Eden Valley Institute | CO0135237 | CWS | Loveland | 91 | Larimer County |
| Edgemont Ranch Md | CO0134200 | CWS | Durango | 1,200 | La Plata County |
| Edgewater City Of | CO0130237 | CWS | Edgewater | 5,300 | Jefferson County |
| Edison School District 54Jt | CO0221300 | NTNCWS | Yoder | 318 | El Paso County |
| El Jebel Mhp | CO0119246 | CWS | El Jebel | 1,962 | Eagle County |
| El Moro Hoehne Pipeline Assoc | CO0136249 | CWS | Trinidad | 655 | Las Animas County |
| El Morro Mobile Estates | CO0121246 | CWS | Littleton | 504 | El Paso County |
| El Rancho Florida Md | CO0134210 | CWS | Durango | 400 | La Plata County |
| El Rocko Mhp | CO0123248 | CWS | Glenwood Springs | 80 | Garfield County |
| Elbert County Hwy 86 Wd | CO0120245 | CWS | Watkins | 1,040 | Elbert County |
| Elbert Creek Water Co | CO0134840 | CWS | Durango | 750 | La Plata County |
| Elbert Wsd | CO0120005 | CWS | Elbert | 300 | Elbert County |
| Eldorado Municipal System | CO0107246 | CWS | Wheat Ridge | 308 | Boulder County |
| Elegant Hills Mhp | CO0142241 | CWS | Montrose | 170 | Montezuma County |
| Elephant Rock Mhp | CO0121200 | CWS | Colorado Springs | 60 | El Paso County |
| Elevado Estates Llc | CO0130025 | CWS | Lakewood | 250 | Jefferson County |
| Eleven Mile Ranch Association | CO0247017 | CWS | Lake George | 72 | Park County |
| Elizabeth Town Of | CO0120010 | CWS | Elizabeth | 4,523 | Elbert County |
| Elk Creek Elem School | CO0230290 | NTNCWS | Lakewood | 600 | Jefferson County |
| Elk Meadows Estates | CO0146592 | CWS | Ridgway | 230 | Ouray County |
| Elk Run Homeowners Corporation | CO0157244 | CWS | Redvale | 125 | San Miguel County |
| Elk Springs Hoa | CO0123485 | CWS | Glenwood Springs | 416 | Garfield County |
| Elk Valley Mhp | CO0141250 | CWS | York | 79 | Moffat County |
| Elkhorn Ranch Md No 1 | CO0120244 | CWS | Centennial | 530 | Elbert County |
| Ellicott Elem Sr High School | CO0221350 | NTNCWS | Calhan | 1,114 | El Paso County |
| Ellicott Utilities Company Llc | CO0121245 | CWS | Colorado Springs | 272 | El Paso County |
| Elmwood Baptist Academy School | CO0201246 | NTNCWS | Brighton | 450 | Adams County |
| Emerald Acres Mobile Home Park | CO0121251 | CWS | Aurora | 280 | El Paso County |
| Empire Town Of | CO0110010 | CWS | Empire | 500 | Clear Creek County |
| Encompass Preschool | CO0218250 | NTNCWS | Parker | 364 | Douglas County |
| Erie Meadows | CO0162257 | CWS | Erie | 41 | Weld County |
| Escalante Village | CO0134255 | CWS | Durango | 62 | La Plata County |
| Estates At Bromley | CO0101031 | CWS | Hudson | 150 | Adams County |
| Eureka Wc | CO0145150 | CWS | Rocky Ford | 498 | Otero County |
| Evergreen Lake Company | CO0126121 | CWS | Cimarron | 431 | Gunnison County |
| Evergreen South | CO0230300 | NTNCWS | Conifer | 80 | Jefferson County |
| Excell Lawson Village | CO0110025 | CWS | Denver | 90 | Clear Creek County |
| Fairplay Mhp | CO0147030 | CWS | Los Altos | 215 | Park County |
| Fairplay Town Of | CO0147020 | CWS | Fairplay | 909 | Park County |
| Falcon Area Water And Wastewater | CO0121724 | CWS | Colorado Springs | 1,926 | El Paso County |
| Falcon Heights Poa | CO0121240 | CWS | Wheat Ridge | 300 | El Paso County |
| Falcon Highlands Md | CO0121247 | CWS | Colorado Springs | 1,050 | El Paso County |
| Falls Creek Ranch | CO0134270 | CWS | Durango | 215 | La Plata County |
| Farmers Korner Mhp | CO0159050 | CWS | Frisco | 159 | Summit County |
| Fayette Wc | CO0145180 | CWS | Manzanola | 75 | Otero County |
| Flagler Town Of | CO0132010 | CWS | Flagler | 2,160 | Kit Carson County |
| Fleming Town Of | CO0138010 | CWS | Fleming | 446 | Logan County |
| Florida River Estates Hoa Inc | CO0134300 | CWS | Bayfield | 239 | La Plata County |
| Florissant Wsd | CO0160175 | CWS | Florissant | 250 | Teller County |
| Forest Glen Sports Assoc Inc | CO0160176 | CWS | Florissant | 76 | Teller County |
| Forest Hills Md Riva Chase | CO0130033 | CWS | Denver | 400 | Jefferson County |
| Forest Lakes Md | CO0121360 | CWS | Colorado Springs | 1,049 | El Paso County |
| Forest Lakes Md | CO0134360 | CWS | Bayfield | 1,699 | La Plata County |
| Forest View Acres Wd | CO0121250 | CWS | Castle Rock | 772 | El Paso County |
| Forrest Groves Estates | CO0134330 | CWS | Durango | 92 | La Plata County |
| Fort Lyon | CO0106900 | CWS | Las Animas | 300 | Bent County |
| Fountain Valley Authority | CO0121300 | CWS | Colorado Springs | 13 | El Paso County |
| Four Mile Ranch Hoa | CO0223279 | CWS | Glenwood Springs | 70 | Garfield County |
| Fowler Town Of | CO0145210 | CWS | Fowler | 1,169 | Otero County |
| Fox Acres Comm Serv Corp | CO0235285 | NTNCWS | Red Feather Lakes | 306 | Larimer County |
| Fox Estates Hoa | CO0154285 | CWS | Steamboat Springs | 50 | Routt County |
| Fox Hill Water Association Inc | CO0162285 | CWS | Fort Lupton | 44 | Weld County |
| Fox Run Meadows Hoa | CO0123295 | CWS | Aspen | 36 | Eagle County |
| Foxhill Md | CO0118285 | CWS | Denver | 123 | Denver County, Douglas County |
| Foxridge Farms Mhp | CO0103050 | CWS | Littleton | 1,440 | Arapahoe County |
| Franklin Mobile Home Park | CO0101288 | CWS | Littleton | 513 | Adams County |
| Franktown Elem School | CO0218006 | NTNCWS | Castle Rock | 365 | Douglas County |
| Fraser Town Of | CO0125288 | CWS | Fraser | 2,150 | Grand County |
| Freeman Creek | CO0234388 | CWS | Bayfield | 88 | La Plata County |
| Friendly Village Of Aurora Mhp | CO0101287 | CWS | Lakewood | 1,786 | Adams County |
| Friendly Village Of Greeley Mhp | CO0162275 | CWS | Lakewood | 660 | Weld County |
| Friendly Village Of The Rockies | CO0101283 | CWS | Thornton | 1,046 | Adams County |
| Friends School | CO0207151 | NTNCWS | Boulder | 39 | Boulder County |
| Front Range | CO0180288 | CWS | Broomfield | 1,620 | Broomfield County |
| Fruitland Domestic Wc | CO0115288 | CWS | Hotchkiss | 335 | Montrose County |
| Ft Garland Wsd | CO0112500 | CWS | Ft Garland | 477 | Costilla County |
| G And M Mobile Home Park | CO0153300 | CWS | Thornton | 30 | Rio Grande County |
| Galambs Mobile Home And Rv Park | CO0101060 | CWS | Aurora | 130 | Adams County |
| Gambel Oaks Hoa | CO0120300 | CWS | Elizabeth | 350 | Elbert County |
| Game Trail Association Inc | CO0108415 | CWS | Buena Vista | 480 | Chaffee County |
| Garcia Domestic Wua | CO0112700 | CWS | Garcia | 100 | Costilla County |
| Garden Meadows | CO0101300 | CWS | Lakewood | 250 | Adams County |
| Garden Valley | CO0121325 | CWS | Colorado Springs | 900 | El Paso County |
| Gardner Water And Sanitation Dist | CO0128300 | CWS | Walsenburg | 400 | Huerfano County |
| Garfield Estates Mhp | CO0139301 | CWS | Boise | 178 | Mesa County |
| Gateway Canyons Ws | CO0139220 | CWS | Gateway | 370 | Mesa County |
| Gateway Childcare And Preschool | CO0221302 | NTNCWS | Windsor | 116 | El Paso County |
| Gateway Md | CO0149300 | CWS | Glenwood Springs | 160 | Pitkin County |
| Gateway School | CO0239300 | NTNCWS | Grand Junction | 75 | Mesa County |
| Gaytan Ws | CO0263299 | NTNCWS | Yuma | 38 | Yuma County |
| Gcc Energy Water System | CO0234301 | NTNCWS | Hesperus | 120 | La Plata County |
| Gcc Rio Grande Red Rock Plant | CO0251303 | NTNCWS | Pueblo | 124 | Pueblo County |
| Genoa Town Of | CO0137005 | CWS | Genoa | 153 | Lincoln County |
| Georgetown Town Of | CO0110015 | CWS | Georgetown | 5,315 | Clear Creek County |
| Gilcrest Town Of | CO0162310 | CWS | Gilcrest | 1,150 | Weld County |
| Gilpin County Justice Center | CO0224200 | NTNCWS | Wheat Ridge | 69 | Gilpin County |
| Gilpin County School | CO0224210 | NTNCWS | Windsor | 562 | Gilpin County |
| Ginters Grove Domestic Water Corp | CO0115310 | CWS | Cedaredge | 62 | Delta County |
| Glendale City Of | CO0103055 | CWS | Glendale | 4,400 | Arapahoe County, Denver County |
| Glenview Owners Assoc | CO0108313 | CWS | Colorado Springs | 195 | Chaffee County |
| Gold Rush Wc | CO0160180 | CWS | Florissant | 132 | Teller County |
| Golden Terrace South | CO0130318 | CWS | Wheat Ridge | 425 | Jefferson County |
| Golden Terrace Village | CO0130317 | CWS | Wheat Ridge | 580 | Jefferson County |
| Goodman Poa | CO0134480 | CWS | Durango | 96 | La Plata County |
| Grace Mar Wua | CO0107321 | CWS | Wheat Ridge | 50 | Boulder County |
| Granada Rural Water Authority | CO0150400 | CWS | Lamar | 378 | Prowers County |
| Granada Town Of | CO0150300 | CWS | Granada | 515 | Prowers County |
| Granby Jones Mhp | CO0125320 | CWS | Golden | 201 | Grand County |
| Granby Town Of North Service Area | CO0125321 | CWS | Granby | 2,025 | Grand County |
| Granby Town Of South Service Area | CO0125710 | CWS | Granby | 2,300 | Grand County |
| Granby Town Of West Service Area | CO0125674 | CWS | Granby | 0 | Grand County |
| Grand Lake Town Of | CO0125322 | CWS | Grand Lake | 2,035 | Grand County |
| Grand Meadow Of Longmont Mhp | CO0107322 | CWS | Lakewood | 255 | Boulder County |
| Grand View Mhp | CO0121345 | CWS | Calhan | 250 | El Paso County |
| Grandview Mhp | CO0121350 | CWS | Palmer Lake | 90 | El Paso County |
| Great Sand Dunes Hq | CO0202300 | NTNCWS | Mosca | 1,400 | Alamosa County |
| Greatrock North Wsd | CO0101063 | CWS | Broomfield | 1,250 | Adams County |
| Greeley Mobile Manor | CO0162326 | CWS | Greeley | 180 | Weld County |
| Greeley Rv Park | CO0162302 | CWS | Los Altos | 164 | Weld County |
| Green Acres Mhp | CO0101065 | CWS | Wheat Ridge | 325 | Adams County |
| Green Acres Mhp | CO0119321 | CWS | Eagle | 130 | Eagle County |
| Green Acres Mobile Home Park | CO0162327 | CWS | Greeley | 180 | Weld County |
| Green Mountain Wsd | CO0130321 | CWS | Lakewood | 49,400 | Jefferson County |
| Greetville Carbondale Water | CO0136321 | CWS | Trinidad | 210 | Las Animas County |
| Grizzly Peak Water Sales | CO0156300 | NTNCWS | Durango | 503 | San Juan County |
| Grover Town Of | CO0162322 | CWS | Windsor | 154 | Weld County |
| Guadalupe Wa | CO0111500 | CWS | Conejos | 42 | Conejos County |
| Guffey Charter School | CO0247326 | NTNCWS | Guffey | 70 | Park County |
| Gunnison County Wsd | CO0126220 | CWS | Gunnison | 800 | Gunnison County |
| Hamilton Creek Md | CO0159063 | CWS | Dillon | 200 | Summit County |
| Hammond Pipeline | CO0115340 | CWS | Paonia | 70 | Delta County |
| Hanover School | CO0221455 | NTNCWS | Colorado Springs | 363 | El Paso County |
| Hanson Mesa Domestic Pipeline Co Inc | CO0115333 | CWS | Hotchkiss | 250 | Delta County |
| Happy Scenes Ws Inc | CO0234390 | CWS | Bayfield | 209 | La Plata County |
| Harmony Village Mhp | CO0135333 | CWS | Lakewood | 1,215 | Larimer County |
| Hartman Town Of | CO0150500 | CWS | Administrative Contact | 61 | Prowers County |
| Harvey Martinez Trailer Court | CO0143335 | CWS | Montrose | 25 | Montrose County |
| Hasty Water Authority | CO0106200 | CWS | Hasty | 244 | Bent County |
| Haswell Town Of | CO0131600 | CWS | Haswell | 55 | Kiowa County |
| Hawkridge Hoa | CO0123345 | CWS | Carbondale | 42 | Garfield County |
| Haxtun Town Of | CO0148001 | CWS | Haxtun | 963 | Phillips County |
| Hazeltine Heights Water | CO0101070 | CWS | Henderson | 261 | Adams County |
| Heartwood Co Op Housing | CO0134338 | CWS | Bayfield | 60 | La Plata County |
| Heeney Water District | CO0159060 | CWS | Silverthorne | 150 | Summit County |
| Hermitage Trailer Park | CO0122338 | CWS | Penrose | 34 | Fremont County |
| Hermosa Village | CO0134450 | CWS | Durango | 98 | La Plata County |
| Herons Nest Rv Park | CO0223810 | CWS | Carbondale | 90 | Garfield County |
| Hi Land Acres Wsd | CO0101075 | CWS | Brighton | 350 | Adams County |
| Hickory Village | CO0135343 | CWS | Windsor | 816 | Larimer County |
| Hidden Lake Community | CO0143337 | CWS | Montrose | 83 | Montrose County |
| Hidden Springs Ranch | CO0254342 | CWS | Hayden | 27 | Routt County |
| Hidden Valley Hoa Water Company | CO0115342 | CWS | Paonia | 120 | Delta County |
| Hidden Valley Water District | CO0130045 | CWS | Evergreen | 155 | Jefferson County |
| High Plains Wua | CO0101080 | CWS | Eastlake | 200 | Adams County |
| High View Wd | CO0130344 | CWS | Denver | 4,000 | Jefferson County |
| Highland Lakes Wd | CO0160200 | CWS | Divide | 875 | Teller County |
| Highland Mobile Home Park | CO0162343 | CWS | Detroit Lakes | 107 | Weld County |
| Hillcrest Village Mhp | CO0101085 | CWS | Wheat Ridge | 1,505 | Adams County |
| Hillrose Town Of | CO0144010 | CWS | Hillrose | 310 | Morgan County |
| Hilltop Wc | CO0145300 | CWS | Rocky Ford | 285 | Otero County |
| Holbrook Center Soft Wa | CO0145330 | CWS | La Junta | 54 | Otero County |
| Holiday Hills Village | CO0101352 | CWS | Wheat Ridge | 1,190 | Adams County |
| Holiday Village Mobile Home Community | CO0121352 | CWS | Colorado Springs | 360 | El Paso County |
| Holland Hills Md | CO0149352 | CWS | Glenwood Springs | 225 | Pitkin County |
| Holly Town Of | CO0150600 | CWS | Holly | 800 | Prowers County |
| Holyoke City Of | CO0148005 | CWS | Holyoke | 2,540 | Phillips County |
| Homestead Improvement Association Inc | CO0145360 | CWS | La Junta | 87 | Otero County |
| Homestead Trails | CO0134809 | CWS | Bayfield | 258 | La Plata County |
| Homestead Wc | CO0130050 | CWS | Evergreen | 1,000 | Jefferson County |
| Hoover Hills Wsd | CO0107352 | CWS | Golden | 662 | Boulder County |
| Hope Ditch Co | CO0101175 | CWS | Brighton | 63 | Adams County |
| Horca Subd Red Bear Inn | CO0111525 | NTNCWS | Antonito | 307 | Conejos County |
| Hot Sulphur Springs Town Of | CO0125352 | CWS | Hot Sulphur Springs | 687 | Grand County |
| Hotchkiss Town Of | CO0115352 | CWS | Hotchkiss | 2,050 | Delta County |
| Huajatolla Valley Estates Inc | CO0128400 | CWS | La Veta | 132 | Huerfano County |
| Hugo Town Of | CO0137010 | CWS | Hugo | 885 | Lincoln County |
| Idalia School | CO0263003 | NTNCWS | Idalia | 452 | Yuma County |
| Idledale Wsd | CO0130055 | CWS | Denver | 350 | Jefferson County |
| Ignacio Town Of | CO0134500 | CWS | Ignacio | 800 | La Plata County |
| Ignacio-Southern Ute Rural Water System | 080890001 | CWS | Ignacio | 1,777 | Archuleta County, La Plata County |
| Iliff Town Of | CO0138015 | CWS | Iliff | 328 | Logan County |
| Ilium Valley Ws | CO0157250 | CWS | Ridgway | 322 | San Miguel County |
| Independence Wsd | CO0120384 | CWS | Denver | 567 | Elbert County |
| Indian Hills Wd | CO0130065 | CWS | Lakewood | 1,300 | Jefferson County |
| Indian Trails Water Llc | CO0153450 | CWS | South Fork | 110 | Rio Grande County |
| Inspiration Valley Mhp | CO0130070 | CWS | Lakewood | 250 | Denver County, Jefferson County |
| Iron Clad Modular Home Park | CO0141388 | CWS | Craig | 30 | Moffat County |
| Island Cove Park | CO0134389 | CWS | Durango | 143 | La Plata County |
| Jacobs Corner | CO0207401 | NTNCWS | Boulder | 250 | Boulder County |
| Jamestown Town Of | CO0107401 | CWS | Jamestown | 280 | Boulder County |
| Johnson Auto Plaza | CO0201417 | NTNCWS | Brighton | 247 | Adams County |
| Joint Water Purification Plant | CO0103418 | CWS | Centennial | 0 | Arapahoe County |
| Joseph T Ryerson And Son Inc | CO0201039 | NTNCWS | Wheat Ridge | 44 | Adams County |
| Julesburg Town Of | CO0158001 | CWS | Julesburg | 1,225 | Sedgwick County |
| Kannah Creek | CO0139434 | CWS | Grand Junction | 435 | Mesa County |
| Karval Water Users Inc | CO0137012 | CWS | Karval | 102 | Lincoln County |
| Keenesburg Town Of | CO0162438 | CWS | Keenesburg | 4,650 | Weld County |
| Keeton Ranch Water | CO0121415 | CWS | Aurora | 70 | El Paso County |
| Ken Caryl West Ranch Wd | CO0130075 | CWS | Aurora | 140 | Jefferson County |
| Ken Caryl Wsd | CO0103075 | CWS | Littleton | 12,000 | Jefferson County |
| Kersey Wd | CO0162439 | CWS | Kersey | 2,101 | Weld County |
| Keystone Ranch | CO0159065 | CWS | Keystone | 670 | Summit County |
| Kim Town Of | CO0136400 | CWS | Kim | 116 | Las Animas County |
| Kimberly Hills Mhp | CO0101443 | CWS | Lakewood | 2,005 | Adams County |
| King Murphy Elementary | CO0210023 | NTNCWS | Wheat Ridge | 276 | Clear Creek County |
| Kingdom Park Court | CO0159070 | CWS | St Louis | 70 | Summit County |
| Kings Row Hoa | CO0123443 | CWS | Carbondale | 100 | Garfield County |
| Kiowa Water And Wastewater Authority | CO0120015 | CWS | Kiowa | 910 | Elbert County |
| Kit Carson Town Of | CO0109011 | CWS | Holly | 326 | Cheyenne County |
| Kk Water Assoc | CO0149218 | CWS | Glenwood Springs | 70 | Pitkin County |
| Knolls At Durango Hoa | CO0134515 | CWS | Durango | 150 | La Plata County |
| Koury Transport | CO0251452 | CWS | Pueblo West | 215 | Pueblo County |
| Kremmling Town Of | CO0125455 | CWS | Kremmling | 1,859 | Grand County |
| Kv Hoa Inc | CO0155700 | CWS | Moffat | 580 | Saguache County |
| La Jara Town Of | CO0111600 | CWS | La Jara | 825 | Conejos County |
| La Plata Archuleta Water District | CO0134191 | CWS | Ignacio | 510 | La Plata County |
| La Plata West Water Authority | CO0134466 | CWS | Hesperus | 354 | La Plata County |
| La Salle Town Of | CO0162466 | CWS | Lasalle | 2,010 | Weld County |
| La Veta Town Of | CO0128500 | CWS | La Veta | 850 | Huerfano County |
| Lafayette Gardens | CO0107466 | CWS | Lakewood | 207 | Boulder County |
| Lago Vista Mobile Home Park | CO0135428 | CWS | Aurora | 842 | Larimer County |
| Lake City Town Of | CO0127467 | CWS | Lake City | 587 | Hinsdale County |
| Lake Creek Meadows Md | CO0119467 | CWS | Edwards | 407 | Eagle County |
| Lake Durango Wa | CO0134530 | CWS | Durango | 1,577 | La Plata County |
| Lake Forest Mutual Wc | CO0125466 | CWS | Grand Lake | 250 | Grand County |
| Lake Fork Mhp | CO0133100 | CWS | Littleton | 487 | Lake County |
| Lake George Charter School | CO0247466 | NTNCWS | Lake George | 250 | Park County |
| Lake Sanchez Estates | CO0212466 | CWS | Alamosa | 34 | Costilla County |
| Lakehurst Wsd | CO0130466 | CWS | Littleton | 12,000 | Jefferson County |
| Lakeshore Mobile Home Park | CO0125467 | CWS | Winter Park | 58 | Grand County |
| Lakewood City Of | CO0130467 | CWS | Lakewood | 6,000 | Jefferson County |
| Lamplighter Estates Mhp | CO0141467 | CWS | Cedaredge | 250 | Moffat County |
| Lamplighter Mhp | CO0101467 | CWS | Lakewood | 651 | Adams County |
| Lamplighter Mobile Home Park | CO0122467 | CWS | Denver | 420 | Fremont County |
| Lamplighter Rhp | CO0121488 | CWS | Lakewood | 643 | El Paso County |
| Laplata Vista Estates Hoa | CO0134540 | CWS | Durango | 68 | La Plata County |
| Lark Meadows Wa | CO0107489 | CWS | Lafayette | 75 | Boulder County |
| Larkspur Subd | CO0126466 | CWS | Crested Butte | 118 | Gunnison County |
| Larkspur Town Of | CO0118030 | CWS | Larkspur | 275 | Douglas County |
| Las Animas City Of | CO0106300 | CWS | Las Animas | 2,139 | Bent County |
| Last Dollar Pud | CO0157300 | CWS | Telluride | 96 | San Miguel County |
| Lazear Domestic Wc | CO0115467 | CWS | Hotchkiss | 178 | Delta County |
| Lazy Diamond A Subd | CO0123360 | CWS | Glenwood Springs | 25 | Garfield County |
| Lazy Glen Hoa | CO0149466 | CWS | Snowmass | 322 | Pitkin County |
| Lazy O Ranch | CO0149467 | CWS | Snowmass | 27 | Pitkin County |
| Lefthand Wsd Lake Pines | CO0107472 | CWS | Boulder | 250 | Boulder County |
| Liberty School | CO0263400 | NTNCWS | Joes | 102 | Yuma County |
| Lightner Creek Mhp | CO0134570 | CWS | Bayfield | 90 | La Plata County |
| Lilly Belle Mhp | CO0134635 | NTNCWS | Ignacio | 30 | La Plata County |
| Limon Correctional Facility | CO0137016 | CWS | Limon | 1,289 | Lincoln County |
| Lions Ridge Estates | CO0123470 | CWS | Glenwood Springs | 63 | Garfield County |
| Little Elk Creek | CO0149476 | CWS | Snowmass | 150 | Pitkin County |
| Little Park Water Coop | CO0139475 | CWS | Grand Junction | 51 | Mesa County |
| Lmp Coop Mhp | CO0107483 | CWS | Greeley | 75 | Boulder County |
| Log Lane Village Town Of | CO0144015 | CWS | Log Lane Village | 1,006 | Morgan County |
| Lone Star School | CO0261001 | NTNCWS | Otis | 149 | Washington County |
| Longs Peak Wd | CO0107486 | CWS | Longmont | 3,200 | Boulder County, Weld County |
| Longview Mhp | CO0107384 | CWS | Lakewood | 1,000 | Weld County |
| Longview Mobile Home Park | CO0116484 | CWS | San Francisco | 147 | Denver County |
| Lookout Mountain Wd | CO0110026 | CWS | Wheat Ridge | 1,378 | Clear Creek County, Jefferson County |
| Los Prados Hoa | CO0134192 | CWS | Durango | 45 | La Plata County |
| Los Ranchitos Hoa | CO0134580 | CWS | Durango | 120 | La Plata County |
| Lost Valley Ranch Corp | CO0230041 | NTNCWS | Sedalia | 106 | Jefferson County |
| Louviers Wsd | CO0118035 | CWS | Castle Rock | 238 | Douglas County |
| Loveland Basin Ski Area | CO0210015 | NTNCWS | Georgetown | 1,025 | Clear Creek County |
| Loveland Mhp | CO0135486 | CWS | Lakewood | 283 | Larimer County |
| Lyons Town Of | CO0107496 | CWS | Lyons | 2,990 | Boulder County |
| Mad Dog Wc | CO0215538 | CWS | Crawford | 60 | Delta County |
| Majestic Mhp | CO0130501 | CWS | Lakewood | 232 | Jefferson County |
| Manassa Town Of | CO0111700 | CWS | Manassa | 976 | Conejos County |
| Mancos Rural Water Company | CO0142600 | CWS | Mancos | 1,300 | Montezuma County |
| Mancos Town Of | CO0142700 | CWS | Mancos | 1,390 | Montezuma County |
| Manzanola Town Of | CO0145450 | CWS | Manzanola | 497 | Otero County |
| Maple Grove Wd | CO0107502 | CWS | Lafayette | 35 | Boulder County |
| Marabou Hoa | CO0154500 | CWS | Steamboat | 68 | Routt County |
| Marble Wc | CO0226500 | CWS | Carbondale | 113 | Gunnison County |
| Marshdale Elem School | CO0230043 | NTNCWS | Lakewood | 920 | Jefferson County |
| May Valley Wa | CO0150800 | CWS | Wiley | 1,500 | Prowers County |
| Mcclave Wa Inc | CO0106500 | CWS | Mcclave | 378 | Bent County |
| Mcdonald Farms Enterprises Inc | CO0207500 | CWS | Denver | 772 | Weld County |
| Meadow Mtn Water Supply | CO0207504 | CWS | Allenspark | 76 | Boulder County |
| Meadow Village Mobile Home Park | CO0162505 | CWS | Loveland | 150 | Weld County |
| Meadowbrook Wd | CO0130500 | CWS | Lakewood | 3,290 | Jefferson County |
| Meadowlark Mobile Home Park | CO0135505 | CWS | Orem | 125 | Larimer County |
| Meadowood Village Mhp | CO0103506 | CWS | Denver | 125 | Arapahoe County |
| Meeker Town Of | CO0152505 | CWS | Meeker | 2,473 | Rio Blanco County |
| Meridian Lake Park | CO0126505 | CWS | Mt Crested Butte | 250 | Gunnison County |
| Merino Town Of | CO0138025 | CWS | Weldona | 235 | Logan County |
| Mesa Antero Subd | CO0108525 | CWS | Nathrop | 250 | Chaffee County |
| Mesa Cortina Wsd | CO0159080 | CWS | Wheat Ridge | 466 | Summit County |
| Mesa Mobile Park | CO0134507 | CWS | Bayfield | 30 | La Plata County |
| Mesa Verde National Park | CO0142750 | NTNCWS | Mesa Verde | 3,177 | Montezuma County |
| Mesa Wsd | CO0139505 | CWS | Mesa | 330 | Mesa County |
| Miami Yoder School District Jt60 | CO0221620 | NTNCWS | Rush | 400 | El Paso County |
| Mid Colorado Investment | CO0121465 | CWS | Colorado Springs | 0 | El Paso County |
| Midlands Village | CO0139510 | CWS | Montrose | 893 | Mesa County |
| Mile Hi Water Inc Hauler | CO0107510 | CWS | Boulder | 1,000 | Boulder County |
| Mile High Mobile Home Park | CO0101511 | CWS | San Francisco | 209 | Adams County |
| Mile High Wc | CO0101510 | CWS | Broomfield | 700 | Adams County, Boulder County |
| Mill Creek Wia | CO0210017 | CWS | Dumont | 67 | Clear Creek County |
| Millard Mobile Home Park | CO0143510 | CWS | Montrose | 90 | Montrose County |
| Milner Park | CO0154510 | CWS | Clark | 100 | Routt County |
| Mineota Estates Hoa | CO0123010 | CWS | Silt | 105 | Garfield County |
| Minnesota Pipeline | CO0115513 | CWS | Paonia | 72 | Delta County |
| Minturn Town Of | CO0119510 | CWS | Minturn | 1,200 | Eagle County |
| Mitchell Cooper Ditch Pipeline | CO0123510 | CWS | Glenwood Springs | 415 | Garfield County |
| Moffat School | CO0255600 | NTNCWS | Moffat | 150 | Saguache County |
| Moffat Town Of | CO0155518 | NTNCWS | Moffat | 12 | Saguache County |
| Molson Coors Beverage Company | CO0230020 | NTNCWS | Golden | 2,725 | Jefferson County |
| Monarch Mountain Lodge | CO0108420 | NTNCWS | Katy | 247 | Chaffee County |
| Monte Vista Co Op | CO0253560 | NTNCWS | Monte Vista | 150 | Rio Grande County |
| Montessori Middle School | CO0230514 | NTNCWS | Evergreen | 75 | Jefferson County |
| Montessori School Of Evergreen | CO0230045 | NTNCWS | Evergreen | 100 | Jefferson County |
| Montezuma Cnty Wd No 1 | CO0142800 | CWS | Cortez | 490 | Montezuma County |
| Monument Meadow Village Mhp | CO0121518 | CWS | Monument | 250 | El Paso County |
| Monument Work Center No 1 | CO0321525 | NTNCWS | Pueblo | 36 | El Paso County |
| Moose Haven Condos | CO0233700 | CWS | Colorado Springs | 48 | Lake County |
| Moraine Park Ws | CO0125518 | CWS | Granby | 100 | Grand County |
| Morrison Creek Metro District | CO0154518 | CWS | Oak Creek | 800 | Routt County |
| Mount Crested Butte Wsd | CO0126190 | CWS | Mt Crested Butte | 3,296 | Gunnison County |
| Mountain Coal Co Llc West Elk Mine | CO0226838 | NTNCWS | Somerset | 300 | Gunnison County |
| Mountain Man Water Service | CO0134516 | CWS | Bayfield | 200 | La Plata County |
| Mountain Meadows | CO0123518 | CWS | Glenwood Springs | 115 | Garfield County |
| Mountain Mutual Wa | CO0160350 | CWS | Cripple Creek | 681 | Teller County |
| Mountain Prairie Llc | CO0206524 | NTNCWS | Las Animas | 126 | Bent County |
| Mountain Shadows Mhp | CO0121519 | CWS | Fountain | 56 | El Paso County |
| Mountain Shadows Mobile Estates | CO0151350 | CWS | Centennial | 45 | Pueblo County |
| Mountain Valley Estates | CO0133300 | CWS | Leadville | 200 | Lake County |
| Mountain Valley Mhp | CO0123519 | CWS | Denver | 338 | Garfield County |
| Mountain View Mhp | CO0107517 | CWS | Loveland | 211 | Boulder County |
| Mountain View Mobile Home Park | CO0143520 | CWS | Glendale | 193 | Montrose County |
| Mountain View Village East | CO0133600 | CWS | Bloomfield Hills | 226 | Lake County |
| Mountain View Village West | CO0133150 | CWS | Bloomfield Hills | 440 | Lake County |
| Mountain View Wua | CO0101100 | CWS | Brighton | 320 | Adams County |
| Mountain Vista Village | CO0108600 | CWS | Salida | 100 | Chaffee County, Fremont County |
| Mountain Wsd | CO0130100 | CWS | Conifer | 1,941 | Jefferson County |
| Mountaindale Cg And Cabins | CO0222518 | CWS | Colorado Springs | 228 | Fremont County |
| Mountainside Estates Mhp | CO0130517 | CWS | Lakewood | 473 | Jefferson County |
| Mt Elbert Wa | CO0133500 | CWS | Leadville | 170 | Lake County |
| Mt Princeton Hoa | CO0108501 | CWS | Nathrop | 79 | Chaffee County |
| Mt Princeton Hot Springs | CO0108500 | NTNCWS | Nathrop | 278 | Chaffee County |
| Mt Vernon Country Club | CO0130090 | CWS | Castle Rock | 734 | Jefferson County |
| Mustang Water Authority | CO0143525 | CWS | Nucla | 0 | Montrose County |
| Narrow Gauge Mhp | CO0134630 | CWS | Durango | 150 | La Plata County |
| National Laboratory Of The Rockies | CO0230860 | NTNCWS | Golden | 168 | Jefferson County |
| Native Water | CO0260533 | CWS | Woodland Park | 100 | Teller County |
| Naturita Town Of | CO0143533 | CWS | Naturita | 585 | Montrose County |
| Navajo Western Water District Estates | CO0128625 | CWS | Walsenburg | 145 | Huerfano County |
| Navajo Western Wd Resorts | CO0128600 | CWS | Walsenburg | 341 | Huerfano County |
| Nederland Town Of | CO0107538 | CWS | Nederland | 2,406 | Boulder County |
| Needles Country Square Llc | CO0234565 | NTNCWS | Durango | 285 | La Plata County |
| Neighbors Of 7Th Street Mhp | CO0142538 | CWS | Cortez | 96 | Montezuma County |
| Neighbors Of Dreamland Mhp | CO0151538 | CWS | Pueblo | 115 | Pueblo County |
| New Creation Church Of Glenwood | CO0223168 | NTNCWS | Glenwood Springs | 499 | Garfield County |
| New Raymer Town Of | CO0162666 | CWS | New Raymer | 73 | Weld County |
| New Vision Mhp | CO0162710 | CWS | Santa Ana | 200 | Weld County |
| Newdale Grand Valley Wc | CO0145480 | CWS | Rocky Ford | 458 | Otero County |
| Newell Warnock Wa | CO0135538 | CWS | Loveland | 160 | Larimer County |
| No Name Creek Ws | CO0123552 | CWS | Glenwood Springs | 160 | Garfield County |
| North Carter Lake Wd | CO0135553 | CWS | Berthoud | 328 | Larimer County |
| North Lincoln Wsd | CO0116552 | CWS | Denver | 1,000 | Adams County, Jefferson County |
| North Pecos Wsd | CO0116553 | CWS | Denver | 2,500 | Adams County |
| North Point Estates Mhp | CO0151552 | CWS | Pueblo | 271 | Pueblo County |
| North Routt Community Charter School | CO0254552 | NTNCWS | Clark | 120 | Routt County |
| North Shore Wsd | CO0125552 | CWS | Grand Lake | 378 | Grand County |
| North Valley Subdivision Utility Company | CO0126580 | CWS | Gunnison | 79 | Gunnison County |
| North Washington Street Wsd | CO0101105 | CWS | Denver | 14,500 | Adams County |
| North Washington Wua | CO0101110 | CWS | Brighton | 90 | Adams County |
| Northbrook Villas Mhc | CO0143552 | CWS | Littleton | 1,052 | Montrose County |
| Northside Village Mhp | CO0101553 | CWS | Windsor | 55 | Adams County |
| Northstar Mobile Home Park | CO0135552 | CWS | Windsor | 136 | Larimer County |
| Norwood Water Commission | CO0157500 | CWS | Norwood | 1,700 | Montrose County, San Miguel County |
| Nucla Town Of | CO0143559 | CWS | Nucla | 875 | Montrose County |
| Nueva Vida Mobile Home Park | CO0135600 | CWS | Fort Collins | 266 | Larimer County |
| Nunn Town Of | CO0162559 | CWS | Nunn | 499 | Weld County |
| Oak Creek Town Of | CO0154566 | CWS | Oak Creek | 950 | Routt County |
| Oak Meadows Mhp | CO0142567 | CWS | Cortez | 200 | Montezuma County |
| Oak Meadows Service Company | CO0123566 | CWS | Glenwood Springs | 180 | Garfield County |
| Oak Meadows Water Association | CO0123567 | CWS | Glenwood Springs | 50 | Garfield County |
| Olathe Town Of | CO0143582 | CWS | Olathe | 3,015 | Montrose County |
| Old Homestead Mhp | CO0134660 | CWS | Durango | 120 | La Plata County |
| Olde Stage Wd | CO0107582 | CWS | Wheat Ridge | 250 | Boulder County |
| Olney Springs Town Of | CO0113500 | CWS | Olney Springs | 399 | Crowley County |
| Olympic Village | CO0125246 | CWS | Fraser | 75 | Grand County |
| Opal Foods Llc Hudson Farm | CO0262508 | NTNCWS | Windsor | 49 | Weld County |
| Opal Foods Llc Roggen Farm | CO0262153 | NTNCWS | Windsor | 27 | Weld County |
| Ophir Town Of | CO0157600 | CWS | Ophir | 193 | San Miguel County |
| Orchard City Town Of | CO0115588 | CWS | Austin | 3,100 | Delta County |
| Orchard Estates | CO0149588 | CWS | Glenwood Springs | 64 | Pitkin County |
| Orchard Park Wa Inc | CO0122580 | CWS | Canon City | 78 | Fremont County |
| Ordway Town Of | CO0113700 | CWS | Ordway | 1,300 | Crowley County |
| Otis Town Of | CO0161010 | CWS | Otis | 600 | Washington County |
| Ouray City Of | CO0146588 | CWS | Ouray | 1,460 | Ouray County |
| Overlook Mutual Wc | CO0121525 | CWS | Colorado Springs | 50 | El Paso County |
| Ovid Town Of | CO0158005 | CWS | Ovid | 259 | Sedgwick County |
| Pacheco Trailer Park | CO0153400 | CWS | Monte Vista | 36 | Rio Grande County |
| Pagels Tp | CO0144025 | CWS | Ft Morgan | 300 | Morgan County |
| Palisade Town Of | CO0139600 | CWS | Palisade | 3,060 | Mesa County |
| Palmer Lake Mobile Home Ranch | CO0121550 | CWS | Administrative Contact | 268 | El Paso County |
| Palmer Lake Town Of | CO0121575 | CWS | Palmer Lake | 2,686 | El Paso County |
| Panorama Ranches Hoa | CO0123595 | CWS | Carbondale | 120 | Garfield County |
| Paoli Town Of | CO0148010 | CWS | Paoli | 42 | Phillips County |
| Paonia Town Of | CO0115601 | CWS | Paonia | 2,499 | Delta County |
| Parachute Town Of | CO0123602 | CWS | Parachute | 1,320 | Garfield County |
| Paradise Park Mhp | CO0139602 | CWS | Boise | 375 | Mesa County |
| Paradise Village Coop Mobile Home Park | CO0162601 | CWS | Greeley | 140 | Weld County |
| Paradox Pipeline Co | CO0143600 | CWS | Paradox | 200 | Montrose County |
| Park Forest | CO0121600 | CWS | Colorado Springs | 930 | El Paso County |
| Park Place Mhp | CO0139603 | CWS | Grand Junction | 35 | Mesa County |
| Park Wc Wonderview | CO0130115 | CWS | Evergreen | 90 | Jefferson County |
| Parker Evangelical Pres Church Pepc | CO0218600 | NTNCWS | Aurora | 950 | Douglas County |
| Peach Valley Orchard Subd | CO0123605 | CWS | Silt | 27 | Garfield County |
| Peak View Park Llc | CO0160095 | CWS | Woodland Park | 106 | Teller County |
| Peaks Shadow Llc | CO0121220 | CWS | Calhan | 67 | El Paso County |
| Peetz Town Of | CO0138030 | CWS | Peetz | 295 | Logan County |
| Penrose Wd | CO0122700 | CWS | Penrose | 3,149 | Fremont County |
| Peyton Ctef School | CO0221700 | NTNCWS | Peyton | 420 | El Paso County |
| Peyton Elem School Grade K 5 | CO0221701 | NTNCWS | Peyton | 388 | El Paso County |
| Peyton High School | CO0221601 | NTNCWS | Peyton | 265 | El Paso County |
| Peyton Pines | CO0121610 | CWS | Peyton | 56 | El Paso County |
| Phillips Mobile Home Park | CO0149609 | CWS | Aspen | 44 | Pitkin County |
| Phippsburg Town Of | CO0154609 | CWS | Steamboat Springs | 200 | Routt County |
| Picture Ranch Mhp | CO0139610 | CWS | Boise | 220 | Mesa County |
| Piedra Park Md | CO0104700 | CWS | Bayfield | 850 | Archuleta County |
| Pierce Town Of | CO0162610 | CWS | Pierce | 1,094 | Weld County |
| Pikes Peak School Of Expeditionary Learn | CO0221607 | NTNCWS | Falcon | 400 | El Paso County |
| Pine Brook Hills Wd | CO0107610 | CWS | Boulder | 1,100 | Boulder County |
| Pine Drive Wd | CO0151450 | CWS | Beulah | 416 | Pueblo County |
| Pine Lake Village | CO0162612 | CWS | Boulder | 65 | Weld County |
| Pine Lakes Ranch | CO0101610 | CWS | Lakewood | 1,905 | Adams County |
| Pine Lane Plaza | CO0218041 | NTNCWS | Wheat Ridge | 226 | Douglas County |
| Pine Tree Plaza West | CO0218040 | NTNCWS | Denver | 170 | Douglas County |
| Pine Wind Mhp | CO0134720 | CWS | Seminole | 60 | La Plata County |
| Pinewood Mobile Home Park | CO0135611 | CWS | Fort Collins | 65 | Larimer County |
| Pinewood Springs Wd | CO0135610 | CWS | Greenwood Village | 745 | Larimer County |
| Pinon Heights Mhp | CO0134730 | CWS | Durango | 43 | La Plata County |
| Pinon Hills Water Users Association | CO0128650 | CWS | Walsenburg | 75 | Huerfano County |
| Pinon Pines Property Llc | CO0108050 | CWS | Denver | 100 | Chaffee County |
| Pinon Wsd | CO0136610 | CWS | Trinidad | 50 | Las Animas County |
| Pinyon Mesa Hoa | CO0123609 | CWS | New Castle | 125 | Garfield County |
| Pioneer Lookout Wd | CO0121625 | CWS | Monument | 120 | El Paso County |
| Pioneer Mobile Home Park | CO0116610 | CWS | Windsor | 250 | Adams County |
| Pitkin Iron Hoa | CO0149611 | CWS | Aspen | 41 | Pitkin County |
| Pitkin Mesa Pipeline Co | CO0115610 | CWS | Paonia | 295 | Delta County |
| Platte Canyon High Fitzsimmons Middle | CO0247011 | NTNCWS | Bailey | 480 | Park County |
| Platte Canyon Wsd | CO0103614 | CWS | Littleton | 19,485 | Arapahoe County, Jefferson County |
| Platte River Power Authority | CO0235668 | NTNCWS | Fort Collins | 88 | Larimer County |
| Platteville Town Of | CO0162615 | CWS | Platteville | 2,900 | Weld County |
| Pleasant Grove Mhp | CO0135614 | CWS | Lakewood | 285 | Larimer County |
| Pleasant View Estates | CO0130604 | CWS | Denver | 122 | Jefferson County |
| Pole Creek Golf Club | CO0225624 | NTNCWS | Winter Park | 490 | Grand County |
| Poncha Springs Town Of | CO0108650 | CWS | Poncha Springs | 2,118 | Chaffee County |
| Ponderosa Park Assoc | CO0126618 | CWS | Crested Butte | 100 | Gunnison County |
| Poudre Valley Mhc | CO0135627 | CWS | Aurora | 985 | Larimer County |
| Prairie Elem At New Raymer | CO0262622 | NTNCWS | New Raymer | 275 | Weld County |
| Prairie Estates | CO0121650 | CWS | Calhan | 220 | El Paso County |
| Prairie Greens Mhp | CO0162621 | CWS | Frederick | 654 | Weld County |
| Prairie View Poa | CO0101125 | CWS | Watkins | 175 | Adams County |
| Prairie View Ranch Wd | CO0144621 | CWS | Wiggins | 140 | Morgan County |
| Prairie Wc | CO0120020 | CWS | Englewood | 300 | Elbert County |
| Prince Creek Village Hoa | CO0149621 | CWS | Carbondale | 50 | Pitkin County |
| Princeton Estates Subd | CO0108655 | CWS | Buena Vista | 150 | Chaffee County |
| Pritchett Town Of | CO0105300 | CWS | Pritchett | 125 | Baca County |
| Project 7 Wa | CO0143621 | CWS | Montrose | 0 | Montrose County |
| Prosperity Lane Wa | CO0150850 | CWS | Lamar | 260 | Prowers County |
| Pueblo Grande Village | CO0151608 | CWS | Wheat Ridge | 504 | Pueblo County |
| Pueblo Pointe Mhc, Llc | CO0151620 | CWS | York | 289 | Pueblo County |
| Purgatory Md | CO0134750 | CWS | Durango | 1,364 | La Plata County |
| Quail Hill Mobile Home Park | CO0121633 | CWS | Los Angeles | 878 | El Paso County |
| Rainbow Valley Wd | CO0160375 | CWS | Divide | 130 | Teller County |
| Ralston Valley Wsd | CO0130667 | CWS | Arvada | 1,610 | Jefferson County |
| Ramah Town Of | CO0121675 | CWS | Ramah | 125 | El Paso County |
| Ranch At Coulter Creek Hoa | CO0123666 | CWS | Carbondale | 27 | Garfield County |
| Ranch At Roaring Fork | CO0123667 | CWS | Carbondale | 300 | Garfield County |
| Rangely Town Of | CO0152666 | CWS | Rangely | 2,495 | Rio Blanco County |
| Rangeview Md | CO0103666 | CWS | Watkins | 2,487 | Arapahoe County |
| Ravencrest Chalet | CO0235666 | NTNCWS | Windsor | 55 | Larimer County |
| Rd Nixon Plant Clear Spring Ranch | CO0221750 | NTNCWS | Colorado Springs | 124 | El Paso County |
| Recovery Village At Palmer Lake Llc | CO0221336 | NTNCWS | Lakewood | 125 | El Paso County |
| Red Cliff Town Of | CO0119671 | CWS | Red Cliff | 469 | Eagle County |
| Red Rock Valley Wd | CO0121700 | CWS | Colorado Springs | 200 | El Paso County |
| Red Sky Ranch | CO0119673 | CWS | Edwards | 291 | Eagle County |
| Red Table Acres Hoa | CO0119672 | CWS | Basalt | 90 | Eagle County |
| Redhill Forest Pomwaca | CO0147040 | CWS | Littleton | 388 | Park County |
| Redi Services West | CO0252671 | NTNCWS | Windsor | 115 | Rio Blanco County |
| Redstone Wsd | CO0149671 | CWS | Redstone | 180 | Pitkin County |
| Redtail Gas Plant | CO0262673 | NTNCWS | Windsor | 48 | Weld County |
| Redwood Estates | CO0101667 | CWS | Lakewood | 1,500 | Adams County |
| Rico Town Of | CO0117700 | CWS | Rico | 437 | Dolores County |
| Ridge Estates Homeowners Association | CO0152677 | CWS | Meeker | 28 | Rio Blanco County |
| Ridgewood Mobile Home Park | CO0130676 | CWS | San Francisco | 196 | Jefferson County |
| Ridgewood Wd | CO0160400 | CWS | Woodland Park | 84 | Teller County |
| Ridgway Town Of | CO0146676 | CWS | Ridgway | 1,000 | Ouray County |
| Rifle Correctional Center | CO0123677 | CWS | Rifle | 287 | Garfield County |
| Rifle Creek Estates Hoa | CO0123675 | CWS | Glenwood Springs | 90 | Garfield County |
| Rio Grande Water Company | CO0253860 | CWS | South Fork | 265 | Rio Grande County |
| River Green Poa | CO0126674 | CWS | Crested Butte | 47 | Gunnison County |
| River Meadows The | CO0143505 | CWS | Montrose | 490 | Montrose County |
| River Ranch Village Mhp Llc | CO0125676 | CWS | Kremmling | 140 | Grand County |
| River Valley Mhc | CO0162677 | CWS | Littleton | 803 | Weld County |
| River Village Llc | CO0108450 | CWS | Buena Vista | 90 | Chaffee County |
| River-Dale Ranch | CO0247010 | CWS | Bailey | 83 | Park County |
| Riverbend Cabins | CO0254676 | CWS | Steamboat Springs | 55 | Routt County |
| Riverbend Water And Sewer Company | CO0123679 | CWS | New Castle | 156 | Garfield County |
| Riverdale Animal Shelter | CO0201674 | NTNCWS | Windsor | 62 | Adams County |
| Riverdale Peaks Ii Md | CO0101675 | CWS | Lakewood | 209 | Adams County |
| Riverland Lot Owners Assoc | CO0126677 | CWS | Crested Butte | 368 | Gunnison County |
| Rivers Bend Condo Assoc | CO0149843 | CWS | Basalt | 32 | Pitkin County |
| Riverside Wc | CO0145570 | CWS | Rocky Ford | 90 | Otero County |
| Riverview Cg | CO0235676 | CWS | Windsor | 450 | Larimer County |
| Riverview Subd | CO0123670 | CWS | Glenwood Springs | 55 | Garfield County |
| Riverwood Mobile Home Park | CO0115675 | CWS | Cedaredge | 37 | Delta County |
| Riviere Estates | CO0253690 | CWS | South Fork | 211 | Rio Grande County |
| Rmnp Headquarters East | CO0135685 | CWS | Estes Park | 900 | Larimer County |
| Roaring Fork Club | CO0249685 | NTNCWS | Basalt | 364 | Pitkin County |
| Roaring Fork Mhp | CO0149685 | CWS | Northbrook | 200 | Pitkin County |
| Roaring Fork Wsd | CO0123125 | CWS | Glenwood Springs | 1,912 | Garfield County |
| Rock Creek Mesa | CO0121725 | CWS | Colorado Springs | 225 | El Paso County |
| Rockvale Town Of | CO0122800 | CWS | Rockvale | 504 | Fremont County |
| Rocky Mountain Energy Center | CO0262687 | NTNCWS | Denver | 39 | Weld County |
| Rocky Mountain Rail Park | CO0201683 | NTNCWS | Broomfield | 65 | Adams County |
| Rogers Mesa Wc | CO0115685 | CWS | Hotchkiss | 840 | Delta County |
| Rolling Plains Estate | CO0103081 | CWS | Strasburg | 40 | Arapahoe County |
| Romeo Town Of | CO0111800 | CWS | Romeo | 365 | Conejos County |
| Rose Park Mhp | CO0139685 | CWS | Boise | 220 | Mesa County |
| Rosewood Hills Property Hoa | CO0160450 | CWS | Woodland Park | 135 | Teller County |
| Round Mountain Wsd | CO0114500 | CWS | Westcliffe | 1,950 | Custer County |
| Roundup River Ranch | CO0219685 | NTNCWS | Gypsum | 167 | Eagle County |
| Roxborough Nw Douglas County | CO0118070 | CWS | Littleton | 860 | Douglas County |
| Ruedi Shores Md | CO0119692 | CWS | Edwards | 165 | Eagle County |
| Rye Town Of | CO0151700 | CWS | Rye | 745 | Pueblo County |
| Saddle Ridge Ranch Estates Wc | CO0126716 | CWS | Crested Butte | 55 | Gunnison County |
| Saddlehorn Ranch Md | CO0121703 | CWS | Colorado Springs | 39 | El Paso County |
| Sage Creek Canyon Corp | CO0159090 | CWS | Silverthorne | 192 | Summit County |
| Sage Pointe Hoa | CO0138042 | CWS | Sterling | 194 | Logan County |
| Sage Wua | CO0121745 | CWS | Peyton | 800 | El Paso County |
| Saguache Town Of | CO0155800 | CWS | Saguache | 504 | Saguache County |
| San Acacio Domestic Wa | CO0112850 | CWS | San Luis | 40 | Costilla County |
| San Bernardo Hoa | CO0157701 | CWS | Telluride | 132 | San Miguel County |
| San Juan Ranch Estates Association, Inc | CO0227700 | CWS | Lake City | 67 | Hinsdale County |
| San Juan River Village Md | CO0104900 | CWS | Pagosa Springs | 877 | Archuleta County |
| San Lazaro Mfctd Housing Community | CO0107701 | CWS | Lafayette | 844 | Boulder County |
| San Luis Valley Research Center | CO0153701 | NTNCWS | Fort Collins | 45 | Rio Grande County |
| San Luis Wsd | CO0112900 | CWS | San Luis | 629 | Costilla County |
| Sanborn Western Camps | CO0260700 | NTNCWS | Florissant | 736 | Teller County |
| Sanctuary Of Peace Poa | CO0121702 | CWS | Colorado Springs | 20 | El Paso County |
| Sanford Town Of | CO0111900 | CWS | Sanford | 850 | Conejos County |
| Sangre De Cristo Lane Seven School | CO0202701 | NTNCWS | Mosca | 445 | Alamosa County |
| Sans Souci Cooperative | CO0107702 | CWS | Boulder | 150 | Boulder County |
| Santa Fe Trail Ranch Md | CO0136700 | CWS | Trinidad | 360 | Las Animas County |
| Sargent Elem And New High School Re33 | CO0253750 | NTNCWS | Windsor | 426 | Rio Grande County |
| Satank Wa | CO0123726 | CWS | Windsor | 80 | Garfield County |
| Sawpit Town Of | CO0157700 | CWS | Placerville | 59 | San Miguel County |
| School In The Woods Acad Sd20 | CO0221810 | NTNCWS | Colorado Springs | 130 | El Paso County |
| Seaboard Foods Llc | CO0163706 | CWS | Holyoke | 132 | Yuma County |
| Security Mhp | CO0121750 | CWS | Stockton | 150 | El Paso County |
| Sedalia Wsd | CO0118060 | CWS | Lakewood | 215 | Douglas County |
| Sedgwick Town Of | CO0158010 | CWS | Sedgwick | 227 | Sedgwick County |
| Seedorf Ws | CO0263705 | NTNCWS | Yuma | 38 | Yuma County |
| Seibert Town Of | CO0132015 | CWS | Seibert | 296 | Kit Carson County |
| Serenity Ridge Vault Connection | CO0135704 | CWS | Berthoud | 157 | Weld County |
| Shadow Mountain Mobile Home Park | CO0121709 | CWS | Colorado Springs | 132 | El Paso County |
| Shadow Mountain Village | CO0125709 | NTNCWS | Fort Collins | 115 | Grand County |
| Shady Lane Mhp | CO0101130 | CWS | Lakewood | 165 | Adams County |
| Shambhala Mountain Center | CO0235685 | CWS | Red Feather Lakes | 90 | Larimer County |
| Shangrila Mhp | CO0121710 | CWS | Colorado Springs | 260 | El Paso County |
| Shannon Wsd | CO0107710 | CWS | Boulder | 450 | Boulder County |
| Shawnee Wca | CO0147090 | CWS | Buffalo Creek | 50 | Park County |
| Sheridan Lake Wd | CO0131800 | CWS | Sheridan Lake | 148 | Kiowa County |
| Sheridan Mhp | CO0130125 | CWS | Lakewood | 480 | Jefferson County |
| Sidney Peak Ranch | CO0154709 | CWS | Steamboat Springs | 42 | Routt County |
| Sierra Bonita Estates | CO0103710 | CWS | Lakewood | 122 | Arapahoe County |
| Sierra Grande School District | CO0212800 | NTNCWS | Blanca | 304 | Costilla County |
| Sierra Middle School | CO0218018 | NTNCWS | Castle Rock | 750 | Douglas County |
| Sierra Verde Water Inc. | CO0234750 | CWS | Durango | 60 | La Plata County |
| Sierra Vista Hoa | CO0118065 | CWS | Wheat Ridge | 120 | Douglas County |
| Signal Mountain Ranch Property Owners Wc | CO0251743 | CWS | Beulah | 66 | Pueblo County |
| Silt Town Of | CO0123710 | CWS | Silt | 3,536 | Garfield County |
| Silver Bonnett Park | CO0121410 | CWS | Falcon | 45 | El Paso County |
| Silver Heights Wsd | CO0118075 | CWS | Castle Rock | 301 | Douglas County |
| Silver Plume Town Of | CO0110035 | CWS | Silver Plume | 180 | Clear Creek County |
| Silverton Town Of | CO0156600 | CWS | Silverton | 2,387 | San Juan County |
| Simla Town Of | CO0120025 | CWS | Simla | 618 | Elbert County |
| Singing Hills Elem School | CO0220700 | NTNCWS | Elizabeth | 520 | Elbert County |
| Ski Town Village | CO0126185 | CWS | Almont | 113 | Gunnison County |
| Skyland Md | CO0226712 | CWS | Crested Butte | 335 | Gunnison County |
| Skylark Mobile Home Community | CO0107712 | CWS | Lafayette | 342 | Boulder County |
| Skyline | CO0135676 | CWS | Fort Collins | 402 | Larimer County |
| Sleepy Bear Mhp | CO0154715 | CWS | Steamboat Springs | 150 | Routt County |
| Sleepy Valley Community Mhp | CO0121717 | CWS | Colorado Springs | 260 | El Paso County |
| Smith Creek Crossing | CO0125716 | CWS | Windsor | 518 | Grand County |
| Soda Springs Wa | CO0125718 | CWS | Grand Lake | 280 | Grand County |
| Soldier Canyon Filter Plant | CO0135718 | CWS | Fort Collins | 0 | Larimer County |
| Solitude Md | CO0118715 | CWS | Castle Rock | 40 | Douglas County |
| Somerset Domestic Wd | CO0126715 | CWS | Somerset | 100 | Gunnison County |
| Sopris Village Hoa | CO0119718 | CWS | Aspen | 425 | Eagle County |
| South Fork Heights Apartments | CO0153718 | CWS | Fort Smith | 80 | Rio Grande County |
| South Fork West Municipal Town Of | CO0253718 | CWS | South Fork | 566 | Rio Grande County |
| South Lamborn Mesa Water Company | CO0115716 | CWS | Paonia | 47 | Delta County |
| South Sheridan Water And Sewer Dist | CO0130718 | CWS | Greenwood Village | 2,500 | Jefferson County |
| South Side Wa | CO0145660 | CWS | La Junta | 44 | Otero County |
| South Swink Water Authority | CO0145690 | CWS | La Junta | 622 | Otero County |
| Southgate Wsd | CO0103721 | CWS | Centennial | 55,000 | Arapahoe County, Douglas County |
| Southwest Horizon Ranch | CO0134717 | CWS | Durango | 323 | La Plata County |
| Southwest Metropolitan Wsd | CO0103723 | CWS | Littleton | 48,648 | Arapahoe County, Douglas County, Jefferson County |
| Spanish Peaks Village Tract Ii Wa | CO0128800 | CWS | Walsenburg | 138 | Huerfano County |
| Spring Canyon Conference Center | CO0208815 | NTNCWS | Buena Vista | 123 | Chaffee County |
| Spring Canyon Wsd | CO0135721 | CWS | Fort Collins | 2,320 | Larimer County |
| Spring Park Meadows | CO0119717 | CWS | Carbondale | 38 | Eagle County |
| Spring Valley Md No 1 | CO0120717 | CWS | Denver | 1,788 | Elbert County |
| Spring Valley Mutual Wa | CO0107719 | CWS | Boulder | 100 | Boulder County |
| Spring View Tp | CO0143719 | CWS | Montrose | 145 | Montrose County |
| Springfield Town Of | CO0105500 | CWS | Springfield | 1,378 | Baca County |
| Springridge Subd | CO0123718 | CWS | Glenwood Springs | 237 | Garfield County |
| Spruce Hill Development | CO0247760 | CWS | Colorado Springs | 277 | Park County |
| St Marys Glacier Wsd | CO0110040 | CWS | Wheat Ridge | 451 | Clear Creek County |
| St Vrain Mhp Llc | CO0107724 | CWS | Lakewood | 544 | Boulder County |
| Stage Run Hoa | CO0103079 | CWS | Aurora | 150 | Arapahoe County |
| Starkville Town Of | CO0136724 | CWS | Trinidad | 62 | Las Animas County |
| Starwood Metropolitan District | CO0149724 | CWS | Aspen | 300 | Pitkin County |
| Steamboat Ii Md | CO0154724 | CWS | Steamboat Springs | 1,450 | Routt County |
| Steamboat Lake Wd | CO0254724 | CWS | Clark | 411 | Routt County |
| Steamboat Mountain School | CO0254842 | NTNCWS | Steamboat Springs | 83 | Routt County |
| Sterling Ranch Cab | CO0118724 | CWS | Littleton | 11,501 | Douglas County |
| Stewart Mesa Wc | CO0115724 | CWS | Paonia | 250 | Delta County |
| Stewarts Mobile Home Park | CO0162723 | CWS | Ault | 156 | Weld County |
| Stoneybrook Mhp | CO0162725 | CWS | Lakewood | 1,073 | Weld County |
| Stoneybrook Pointe | CO0162726 | CWS | Lakewood | 355 | Weld County |
| Storm King Mhp | CO0123724 | CWS | Windsor | 135 | Garfield County |
| Strasburg Wsd | CO0101145 | CWS | Strasburg | 2,050 | Adams County, Arapahoe County |
| Stratton Town Of | CO0132020 | CWS | Stratton | 960 | Kit Carson County |
| Stucker Mesa Domestic Wc | CO0115726 | CWS | Hotchkiss | 36 | Delta County |
| Suburban Estates Mhp | CO0101725 | CWS | Denver | 115 | Adams County |
| Sugar City Town Of | CO0113900 | CWS | Sugar City | 240 | Crowley County |
| Summit Park Md | CO0220725 | NTNCWS | Elizabeth | 138 | Elbert County |
| Sun Meadow Estates | CO0123500 | CWS | Glenwood Springs | 75 | Garfield County |
| Sunflower Valley Pipeline Assn | CO0136725 | CWS | Trinidad | 312 | Las Animas County |
| Sunlight View Www Company | CO0123725 | CWS | Glenwood Springs | 234 | Garfield County |
| Sunnyslope Homeowners | CO0138725 | CWS | Sterling | 29 | Logan County |
| Sunrise Ranch | CO0135725 | CWS | Loveland | 75 | Larimer County |
| Sunrise Trailer Park | CO0143725 | CWS | Montrose | 60 | Montrose County |
| Sunset Hills Mobile Park | CO0121727 | CWS | Colorado Springs | 157 | El Paso County |
| Sunset Park Mhc | CO0135717 | CWS | Aurora | 462 | Larimer County |
| Sunset Wd | CO0135726 | CWS | Windsor | 425 | Larimer County |
| Sunshine Acres Mhp | CO0135727 | CWS | Cedaredge | 78 | Larimer County |
| Sunshine Mesa Domestic Wc | CO0115725 | CWS | Hotchkiss | 76 | Delta County |
| Swan Meadow Village | CO0159727 | CWS | Windsor | 200 | Summit County |
| Swans Nest Md | CO0159725 | CWS | Edwards | 200 | Summit County |
| Swink Town Of | CO0145720 | CWS | Swink | 660 | Otero County |
| Swiss Village Hoa | CO0149727 | CWS | Redstone | 95 | Pitkin County |
| Tabernash Meadows Wsd | CO0125720 | CWS | Tabernash | 564 | Grand County |
| Table Mesa Village Mhp | CO0107733 | CWS | Wheat Ridge | 75 | Boulder County |
| Tagawa Greenhouses Inc | CO0262735 | NTNCWS | Brighton | 250 | Weld County |
| Tall Pines Village | CO0134810 | CWS | Durango | 60 | La Plata County |
| Tanglewood Ws | CO0159120 | CWS | Silverthorne | 60 | Summit County |
| Teller County Wsd | CO0160600 | CWS | Woodland Park | 600 | Teller County |
| Teller Springs Hoa | CO0123343 | CWS | Glenwood Springs | 84 | Garfield County |
| Telluride Pines Hoa | CO0157900 | CWS | Placerville | 25 | San Miguel County |
| Terrace Park Mhp | CO0162738 | CWS | Lakewood | 297 | Weld County |
| The Aspens Mobile Home Village | CO0119122 | CWS | Centennial | 318 | Eagle County |
| The Grove At Alta Ridge | CO0101320 | CWS | Thornton | 1,300 | Adams County |
| The Hideout At Glenwood Springs | CO0223343 | CWS | San Francisco | 94 | Garfield County |
| The Meadows | CO0103504 | CWS | Lakewood | 758 | Arapahoe County |
| The Springs Mhp | CO0121718 | CWS | Lakewood | 1,229 | El Paso County |
| Third Creek Wua | CO0101155 | CWS | Brighton | 90 | Adams County |
| Thornton Estates | CO0101741 | CWS | Lakewood | 300 | Adams County |
| Three Mile Tp | CO0123742 | CWS | Carbondale | 50 | Garfield County |
| Thunderbird Wsd | CO0118078 | CWS | Sedalia | 490 | Douglas County |
| Timber Creek Wd | CO0259003 | CWS | Silverthorne | 312 | Summit County |
| Timber Ridge Mhp | CO0135742 | CWS | Fort Collins | 1,736 | Larimer County |
| Timberline Lodge | CO0225735 | NTNCWS | Morrison | 68 | Grand County |
| Timbers Wsd | CO0154743 | CWS | Steamboat Springs | 200 | Routt County |
| Todd W Knight | CO0251752 | NTNCWS | Cheyenne | 71 | Pueblo County |
| Towaoc Water System | 080890010 | CWS | Towoac | 2,020 | Montezuma County |
| Town Of Winter Park Lift Transit Wts | CO0225750 | NTNCWS | Winter Park | 55 | Grand County |
| Trail West Assoc | CO0108900 | CWS | Buena Vista | 249 | Chaffee County |
| Tranquil Acres Ws | CO0160650 | CWS | Woodland Park | 180 | Teller County |
| Trapper Mine | CO0241755 | NTNCWS | Craig | 155 | Moffat County |
| Travois Hoa | CO0103090 | CWS | Aurora | 175 | Arapahoe County, Douglas County |
| Tree Haus Md | CO0154755 | CWS | Steamboat Springs | 248 | Routt County |
| Tres Valles West | CO0128726 | CWS | Trinidad | 68 | Huerfano County |
| Tri State Elec Craig Station | CO0241185 | NTNCWS | Denver | 500 | Moffat County |
| Triangle Tp | CO0134640 | CWS | Durango | 39 | La Plata County |
| Trinchera Property Management Inc | CO0212400 | NTNCWS | Blanca | 55 | Costilla County |
| Trinidad Lake Ranches Poa | CO0136850 | CWS | Trinidad | 200 | Las Animas County |
| Trinidad Manufactured Home Community | CO0136755 | CWS | Cedaredge | 133 | Las Animas County |
| Tucson Wc | CO0101158 | CWS | Henderson | 90 | Adams County |
| Turkey Canon Ranch Wd | CO0121841 | CWS | Colorado Springs | 138 | El Paso County |
| Tv Hills Water | CO0114550 | CWS | Wetmore | 38 | Custer County |
| Twenty Mile Coal Co | CO0254200 | NTNCWS | Oak Creek | 475 | Routt County |
| Twilight Wc | CO0134855 | CWS | Durango | 78 | La Plata County |
| Twin Rivers Mhp, Llc | CO0139760 | CWS | York | 67 | Mesa County |
| Two Buttes Town Of | CO0105700 | CWS | Two Buttes | 64 | Baca County |
| United Church Of Christ Parker Hilltop | CO0218766 | NTNCWS | Parker | 95 | Douglas County |
| Upper Surface Creek Domestic Wua | CO0115784 | CWS | Cedaredge | 2,800 | Delta County |
| Usdot Trans Tech Cnt | CO0251050 | NTNCWS | Windsor | 385 | Pueblo County |
| Ute Heights Community Ws | CO0108925 | CWS | Nathrop | 69 | Chaffee County |
| Ute Pass Wa Inc | CO0134790 | CWS | Durango | 120 | La Plata County |
| Vallecito Village | CO0134828 | NTNCWS | Bayfield | 34 | La Plata County |
| Valley At Winter Park Wd | CO0125840 | CWS | Littleton | 50 | Grand County |
| Valley Maint Corp No 1 | CO0160550 | CWS | Colorado Springs | 470 | Teller County |
| Valley Maint Corp No 2 | CO0160551 | CWS | Divide | 55 | Teller County |
| Valley Mobile Home Llc | CO0102300 | CWS | Carbondale | 85 | Alamosa County |
| Valley View Park Mobile Home Community | CO0114801 | CWS | Westcliffe | 44 | Custer County |
| Valley Vista Estates | CO0101800 | CWS | Denver | 51 | Adams County |
| Valley Wc | CO0145750 | CWS | Manzanola | 270 | Otero County |
| Valley Wd | CO0130800 | CWS | Wheat Ridge | 10,000 | Jefferson County |
| Valley West Park | CO0134870 | CWS | Cedaredge | 93 | La Plata County |
| Valli Hi Mhp | CO0110045 | CWS | Denver | 50 | Clear Creek County |
| Van Den Berg Md | CO0134900 | CWS | Ignacio | 41 | La Plata County |
| Victor City Of | CO0160700 | CWS | Victor | 491 | Teller County |
| Viejo San Acacio | CO0112810 | CWS | San Luis | 45 | Costilla County |
| View Ridge Mutual Wc | CO0118080 | CWS | Sedalia | 35 | Douglas County |
| Vilas Town Of | CO0105800 | CWS | Vilas | 137 | Baca County |
| Villa West | CO0162809 | CWS | Lakewood | 833 | Weld County |
| Vineyards Mhc | CO0139811 | CWS | Boise | 150 | Mesa County |
| Vista Verde Village | CO0142804 | CWS | Ouray | 200 | Montezuma County |
| Vista Village Mhp | CO0107810 | CWS | Los Angeles | 750 | Boulder County |
| Vona Town Of | CO0132025 | CWS | Vona | 160 | Kit Carson County |
| Vroman Wc | CO0145780 | CWS | Manzanola | 125 | Otero County |
| Wagon Wheel Mhp | CO0102900 | CWS | Colorado Springs | 160 | Alamosa County |
| Walden Town Of | CO0129834 | CWS | Walden | 600 | Jackson County |
| Walden Wsd | CO0121850 | CWS | Monument | 1,500 | El Paso County |
| Waldorf School | CO0223833 | NTNCWS | Glenwood Springs | 218 | Garfield County |
| Walsenburg City Of | CO0128900 | CWS | Walsenburg | 3,230 | Huerfano County |
| Walsh Town Of | CO0105900 | CWS | Walsh | 650 | Baca County |
| Ward Town Of | CO0107834 | CWS | Ward | 230 | Boulder County |
| Warm Springs Owners Mutual Wa | CO0147180 | CWS | Fairplay | 250 | Park County |
| Water On The Spot | CO0122875 | CWS | Florence | 284 | Fremont County |
| Water View Condominium Assoc | CO0149710 | CWS | Aspen | 30 | Pitkin County |
| Wattenberg Improvement Assoc | CO0162833 | CWS | Fort Lupton | 350 | Weld County |
| Wayside | CO0259019 | CWS | Frisco | 40 | Summit County |
| Well On Wheels Water Hauler | CO0234837 | CWS | Durango | 25 | La Plata County |
| West End Center Ws | CO0221838 | NTNCWS | Lakewood | 45 | El Paso County |
| West Grand Valley Wa | CO0145810 | CWS | Rocky Ford | 100 | Otero County |
| West Paonia Domestic Water Company | CO0115838 | CWS | Paonia | 57 | Delta County |
| West Ranch Center | CO0230233 | NTNCWS | Denver | 75 | Jefferson County |
| West Ranch Subd | CO0149613 | CWS | Glenwood Springs | 28 | Pitkin County |
| Westbank Mesa Hoa | CO0123836 | CWS | Glenwood Springs | 93 | Garfield County |
| Westbank Ranch Hoa | CO0123838 | CWS | Glenwood Springs | 400 | Garfield County |
| Westcreek Lakes Wd | CO0118085 | CWS | Westcreek | 165 | Douglas County |
| Western Extension Domestic Water Company | CO0115841 | CWS | Paonia | 37 | Delta County |
| Western Hills Mhp | CO0139838 | CWS | Las Vegas | 213 | Mesa County |
| Western Inn Mhp | CO0110050 | CWS | Greenwood Village | 72 | Clear Creek County |
| Western Metals Recycling | CO0203834 | NTNCWS | Salt Lake City | 45 | Arapahoe County |
| Westlake Mhp | CO0139839 | CWS | Boise | 116 | Mesa County |
| Westside Mhp | CO0134690 | CWS | Durango | 236 | La Plata County |
| Westwinds Wd | CO0108960 | CWS | Buena Vista | 63 | Chaffee County |
| Westwood Lakes Wd | CO0160750 | CWS | Woodland Park | 450 | Teller County |
| Wheat Ridge Water District | CO0130842 | CWS | Wheat Ridge | 20,000 | Jefferson County |
| White Haven Mhp | CO0154842 | CWS | Steamboat Springs | 56 | Routt County |
| White Horse Springs Wd | CO0149842 | CWS | Aspen | 70 | Pitkin County |
| Wide Acres Mhp | CO0115842 | CWS | Glendale | 96 | Delta County |
| Wiggins Town Of | CO0144035 | CWS | Wiggins | 1,909 | Morgan County |
| Wigwam Mutual Wc | CO0121470 | CWS | Fountain | 1,300 | El Paso County, Pueblo County |
| Wikiup Mhp | CO0101180 | CWS | Lakewood | 2,500 | Adams County |
| Wildcat Ranch | CO0149185 | CWS | Carbondale | 33 | Pitkin County |
| Wildwood School | CO0249843 | NTNCWS | Aspen | 50 | Pitkin County |
| Wiley Town Of | CO0150900 | CWS | Wiley | 405 | Prowers County |
| Will O Wisp Metro District | CO0147200 | CWS | Bailey | 300 | Park County |
| Williams Creek Water | CO0123842 | CWS | Silt | 60 | Garfield County |
| Williamsburg Town Of | CO0122950 | CWS | Williamsburg | 775 | Fremont County |
| Willow Bend Mhp | CO0154843 | CWS | Dallas | 46 | Routt County |
| Willow Brook Metro District | CO0259020 | CWS | Greenwood Village | 120 | Summit County |
| Willow Crossing Mhp | CO0162835 | CWS | Fort Lupton | 159 | Weld County |
| Willow Hill Mobile Home Park | CO0154844 | CWS | Dallas | 86 | Routt County |
| Willowbrook Wsd | CO0130843 | CWS | Lakewood | 9,348 | Jefferson County |
| Willows Wd | CO0103100 | CWS | Centennial | 19,000 | Arapahoe County |
| Wilson Mesa | CO0157950 | CWS | Telluride | 290 | San Miguel County |
| Windcliff Poa | CO0135001 | CWS | Estes Park | 339 | Larimer County |
| Winter Park Christian Church | CO0225847 | NTNCWS | Tabernash | 135 | Grand County |
| Winter Park Ranch Wsd | CO0125844 | CWS | Fraser | 3,250 | Grand County |
| Wise Project | CO0103843 | CWS | Greenwood Village | 0 | Arapahoe County |
| Wj Metro District | CO0149844 | CWS | Woody Creek | 324 | Pitkin County |
| Wolford Elementary School District 20 | CO0221980 | NTNCWS | Colorado Springs | 475 | El Paso County |
| Wooden Deer Hoa | CO0123860 | CWS | Glenwood Springs | 38 | Garfield County |
| Woodland Hills Mhc | CO0101833 | CWS | Wheat Ridge | 1,740 | Adams County |
| Woodland West Wua | CO0160950 | CWS | Woodland Park | 250 | Teller County |
| Woodlands East | CO0162852 | CWS | Greeley | 350 | Weld County |
| Woodlin School | CO0261003 | NTNCWS | Woodrow | 373 | Washington County |
| Woodshire East Mobile Home Park Ltd | CO0103853 | CWS | Los Angeles | 751 | Arapahoe County |
| Woody Creek Metropolitan District | CO0149852 | CWS | Woody Creek | 220 | Pitkin County |
| Wray City Of | CO0163010 | CWS | Wray | 2,342 | Yuma County |
| Xcel Energy Comanche Plant | CO0251700 | NTNCWS | Denver | 272 | Pueblo County |
| Xcel Energy Hayden Station | CO0254185 | NTNCWS | Denver | 110 | Routt County |
| Yampa Town Of | CO0154900 | CWS | Yampa | 467 | Routt County |
| Yellow Barn Limited | CO0230192 | NTNCWS | Conifer | 75 | Jefferson County |
| Young Life Crooked Creek | CO0225918 | NTNCWS | Fraser | 595 | Grand County |
| Yuma Feedlot | CO0263185 | NTNCWS | Lasalle | 149 | Yuma County |