683 community and non-transient non-community water systems are listed for Arkansas in EPA SDWIS. 172 were sampled under UCMR 5; 10 of those had at least one PFAS result at or above the reporting level, and 1 had a highest single result at or above a 2024 EPA limit (PFOA or PFOS 4 ppt, or Hazard Index 1).
Arkansas 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 (172)
| System | PWSID | City | Population | Highest PFOA (ppt) | Highest PFOS (ppt) | Highest HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Adc - Cummins Unit Maint | AR0000315 | Grady | 4,362 | <MRL | <MRL | 0 | No PFAS detected |
| Alma Waterworks | AR0000144 | Alma | 6,123 | <MRL | <MRL | 0 | No PFAS detected |
| Arkadelphia Waterworks | AR0000085 | Arkadelphia | 11,855 | <MRL | <MRL | 0 | No PFAS detected |
| Ashdown Waterworks | AR0000320 | Ashdown | 4,261 | <MRL | <MRL | 0 | No PFAS detected |
| Atkins Water System | AR0000441 | Atkins | 4,439 | <MRL | <MRL | 0 | No PFAS detected |
| Barling Waterworks | AR0000512 | Barling | 5,822 | <MRL | <MRL | 0 | No PFAS detected |
| Barton Lexa Water Association | AR0000415 | Poplar Grove | 3,565 | <MRL | <MRL | 0 | No PFAS detected |
| Batesville Water Utilities | AR0000250 | Batesville | 15,621 | <MRL | <MRL | 0 | No PFAS detected |
| Batts-Lapile Water Association | AR0000622 | Strong | 583 | <MRL | <MRL | 0 | No PFAS detected |
| Beaverfork Pwa | AR0000844 | Conway | 4,220 | <MRL | <MRL | 0 | No PFAS detected |
| Beebe Waterworks | AR0000592 | Beebe | 9,490 | <MRL | <MRL | 0 | Other PFAS detected |
| Bella Vista Poa | AR0000039 | Bella Vista | 39,419 | <MRL | <MRL | 0 | No PFAS detected |
| Benton County Water District #1 | AR0000037 | Avoca | 6,730 | <MRL | <MRL | 0 | No PFAS detected |
| Benton Waterworks | AR0000484 | Benton | 30,681 | <MRL | <MRL | 0 | No PFAS detected |
| Bentonville Water Utilities | AR0000041 | Bentonville | 51,250 | <MRL | <MRL | 0 | Other PFAS detected |
| Berryville Waterworks | AR0000074 | Berryville | 6,813 | <MRL | <MRL | 0 | No PFAS detected |
| Blytheville Waterworks | AR0000365 | Blytheville | 12,981 | <MRL | <MRL | 0 | No PFAS detected |
| Booneville Waterworks | AR0000326 | Booneville | 3,847 | <MRL | <MRL | 0 | No PFAS detected |
| Bradley Co Rural Water Association | AR0000054 | Warren | 1,163 | <MRL | <MRL | 0 | No PFAS detected |
| Brinkley Waterworks | AR0000384 | Brinkley | 3,125 | <MRL | <MRL | 0 | No PFAS detected |
| Bryant Waterworks | AR0000486 | Bryant | 19,607 | <MRL | <MRL | 0 | No PFAS detected |
| Buffalo Island Reg Water Dist | AR0000671 | Caraway | 3,055 | <MRL | <MRL | 0 | No PFAS detected |
| Cabot Waterworks | AR0000338 | Cabot | 27,578 | <MRL | <MRL | 0 | No PFAS detected |
| Camden Waterworks | AR0000404 | Camden | 13,275 | <MRL | <MRL | 0 | No PFAS detected |
| Cave Springs Waterworks | AR0000043 | Cave Springs | 5,365 | <MRL | <MRL | 0 | No PFAS detected |
| Cedarville Waterworks Fbcc | AR0000138 | Cedarville | 8,529 | <MRL | <MRL | 0 | No PFAS detected |
| Center Grove Water Association | AR0000213 | Sheridan | 3,858 | <MRL | <MRL | 0 | No PFAS detected |
| Centerton Waterworks | AR0000044 | Centerton | 27,243 | <MRL | <MRL | 0 | No PFAS detected |
| Central Arkansas Water | AR0000465 | Little Rock | 368,455 | <MRL | <MRL | 0 | No PFAS detected |
| Cherokee Village Water Assoc | AR0000521 | Cherokee Village | 4,780 | <MRL | <MRL | 0 | No PFAS detected |
| City Corporation | AR0000446 | Russellville | 29,260 | <MRL | <MRL | 0 | No PFAS detected |
| Clarksville Connected Utilities | AR0000289 | Clarksville | 9,410 | <MRL | <MRL | 0 | No PFAS detected |
| Clay Co Reg Water District | AR0000722 | Mcdougal | 5,633 | <MRL | <MRL | 0 | No PFAS detected |
| Clinton Waterworks | AR0000564 | Clinton | 11,013 | <MRL | <MRL | 0 | No PFAS detected |
| Community Water System | AR0000101 | Greers Ferry | 18,628 | <MRL | <MRL | 0 | No PFAS detected |
| Conway Co Regional Water Dist | AR0000119 | Morrilton | 21,393 | <MRL | <MRL | 0 | No PFAS detected |
| Conway Water System | AR0000189 | Conway | 65,233 | <MRL | <MRL | 0 | No PFAS detected |
| Corning Waterworks | AR0000096 | Corning | 3,388 | <MRL | <MRL | 0 | No PFAS detected |
| Cross County Rural Water Sys | AR0000459 | Hickory Ridge | 8,750 | <MRL | <MRL | 0 | No PFAS detected |
| Crossett Water Commission | AR0000017 | Crossett | 7,900 | <MRL | <MRL | 0 | No PFAS detected |
| Crowleys Ridge Water Assoc | AR0000180 | Harrisburg | 3,873 | <MRL | <MRL | 0 | Other PFAS detected |
| Dardanelle Waterworks | AR0000601 | Dardanelle | 4,517 | <MRL | 4.4 | 0.53 | PFOS 1–3 × its limit |
| Decatur Waterworks | AR0000052 | Decatur | 2,468 | <MRL | <MRL | 0 | No PFAS detected |
| Dequeen Water Work | AR0000520 | Dequeen | 6,105 | <MRL | <MRL | 0 | No PFAS detected |
| Des Arc Waterworks | AR0000449 | Des Arc | 4,245 | <MRL | <MRL | 0 | No PFAS detected |
| Dumas Waterworks | AR0000171 | Dumas | 6,338 | <MRL | <MRL | 0 | No PFAS detected |
| East End Water | AR0000646 | Little Rock | 5,954 | <MRL | <MRL | 0 | No PFAS detected |
| East Johnson Co Water Assn | AR0000772 | Lamar | 5,200 | <MRL | <MRL | 0 | No PFAS detected |
| El Dorado Waterworks | AR0000550 | El Dorado | 17,932 | <MRL | <MRL | 0 | No PFAS detected |
| Elkins Waterworks | AR0000567 | Elkins | 3,905 | <MRL | <MRL | 0 | No PFAS detected |
| Eureka Springs Waterworks | AR0000075 | Eureka Springs | 4,053 | <MRL | <MRL | 0 | No PFAS detected |
| Fayetteville Waterworks | AR0000569 | Fayetteville | 116,398 | <MRL | <MRL | 0 | No PFAS detected |
| Flippin Waterworks | AR0000351 | Flippin | 3,870 | <MRL | <MRL | 0 | Other PFAS detected |
| Fordyce Water Co | AR0000164 | Fordyce | 3,191 | <MRL | <MRL | 0 | No PFAS detected |
| Forrest City Waterworks | AR0000004 | Forrest City | 9,986 | <MRL | <MRL | 0 | No PFAS detected |
| Fort Smith Water Utilities | AR0000507 | Fort Smith | 86,209 | <MRL | <MRL | 0 | No PFAS detected |
| Four Mile Hill Public Facilities Board | AR0000586 | Searcy | 4,877 | <MRL | <MRL | 0 | No PFAS detected |
| Gentry Waterworks | AR0000048 | Gentry | 8,870 | <MRL | <MRL | 0 | No PFAS detected |
| Grand Prairie Bayou 2 Pwa | AR0000734 | Austin | 13,138 | <MRL | <MRL | 0 | No PFAS detected |
| Grand Prairie Regional Water | AR0000738 | Stuttgart | 16,330 | <MRL | <MRL | 0 | No PFAS detected |
| Gravette Waterworks | AR0000051 | Gravette | 4,900 | <MRL | <MRL | 0 | No PFAS detected |
| Green Forest Waterworks | AR0000077 | Green Forest | 6,265 | <MRL | <MRL | 0 | No PFAS detected |
| Greenbrier Waterworks | AR0000191 | Greenbrier | 12,938 | <MRL | <MRL | 0 | No PFAS detected |
| Greenwood Waterworks | AR0000504 | Greenwood | 9,905 | <MRL | <MRL | 0 | No PFAS detected |
| Guy Waterworks | AR0000192 | Guy | 2,438 | <MRL | <MRL | 0 | No PFAS detected |
| Hamburg Waterworks | AR0000015 | Hamburg | 5,600 | <MRL | <MRL | 0 | No PFAS detected |
| Hardin Water Association | AR0000273 | Pine Bluff | 4,600 | <MRL | <MRL | 0 | No PFAS detected |
| Harrisburg Waterworks | AR0000431 | Harrisburg | 2,824 | <MRL | <MRL | 0 | No PFAS detected |
| Harrison Waterworks | AR0000062 | Harrison | 17,455 | <MRL | <MRL | 0 | No PFAS detected |
| Hartford Waterworks | AR0000506 | Hartford | 725 | <MRL | <MRL | 0 | No PFAS detected |
| Hartman Waterworks | AR0000286 | Hartman | 947 | <MRL | <MRL | 0 | No PFAS detected |
| Haskell Water System | AR0000488 | Haskell | 4,000 | <MRL | <MRL | 0 | No PFAS detected |
| Heber Springs Water System | AR0000104 | Heber Springs | 14,015 | <MRL | <MRL | 0 | No PFAS detected |
| Helena Water Sewer | AR0000419 | Helena | 2,708 | <MRL | <MRL | 0 | No PFAS detected |
| Holiday Island Waterworks | AR0000078 | Holiday Island | 2,446 | <MRL | <MRL | 0 | No PFAS detected |
| Hope Water Light Comm | AR0000230 | Hope | 11,500 | <MRL | <MRL | 0 | No PFAS detected |
| Horsehead Water Association | AR0000617 | Clarksville | 5,792 | <MRL | <MRL | 0 | No PFAS detected |
| Hot Spring Co Water Assoc | AR0000236 | Donaldson | 3,528 | <MRL | <MRL | 0 | Other PFAS detected |
| Hot Springs Utilities | AR0000209 | Hot Springs | 75,343 | <MRL | <MRL | 0 | No PFAS detected |
| Hot Springs Village Waterworks | AR0000208 | Hot Springs Village | 15,985 | <MRL | <MRL | 0 | No PFAS detected |
| Hwy 63 Water Association | AR0000107 | Rison | 7,187 | <MRL | <MRL | 0 | No PFAS detected |
| Hwy 71 Water District #1 Pwa | AR0000145 | Alma | 6,275 | <MRL | <MRL | 0 | No PFAS detected |
| Jacksonville Waterworks | AR0000466 | Jacksonville | 32,875 | <MRL | <MRL | 0 | No PFAS detected |
| James Fork Regional Water District | AR0000513 | Greenwood | 11,538 | <MRL | <MRL | 0 | No PFAS detected |
| Jonesboro Water System | AR0000124 | Jonesboro | 81,888 | <MRL | <MRL | 0 | No PFAS detected |
| Kimzey Regional Water District | AR0000821 | Malvern | 12,718 | <MRL | <MRL | 0 | No PFAS detected |
| Lakeview-Midway Public Water Authority | AR0000027 | Lakeview | 4,344 | <MRL | <MRL | 0 | Other PFAS detected |
| Lavaca Waterworks | AR0000510 | Lavaca | 3,650 | <MRL | <MRL | 0 | No PFAS detected |
| Lawrence Co Reg Water Dist | AR0000688 | Pocahontas | 7,469 | <MRL | <MRL | 0 | No PFAS detected |
| Lee County Water Association | AR0000313 | Marianna | 3,770 | <MRL | <MRL | 0 | No PFAS detected |
| Liberty Utilities | AR0000272 | Pine Bluff | 43,438 | <MRL | <MRL | 0 | No PFAS detected |
| Lincoln Waterworks | AR0000572 | Lincoln | 6,690 | <MRL | <MRL | 0 | No PFAS detected |
| Little Creek Water Association | AR0000214 | Sheridan | 2,561 | <MRL | <MRL | 0 | No PFAS detected |
| Little River Co Rda | AR0000787 | Foreman | 5,268 | <MRL | <MRL | 0 | No PFAS detected |
| Lonoke Waterworks | AR0000343 | Lonoke | 4,277 | <MRL | <MRL | 0 | No PFAS detected |
| Madison Co Water Facilities Bd | AR0000349 | Huntsville | 11,435 | <MRL | <MRL | 0 | No PFAS detected |
| Magnolia Waterworks | AR0000109 | Magnolia | 11,657 | <MRL | <MRL | 0 | No PFAS detected |
| Malvern Waterworks | AR0000237 | Malvern | 14,410 | <MRL | <MRL | 0 | No PFAS detected |
| Manila Waterworks | AR0000378 | Manila | 4,165 | <MRL | <MRL | 0 | No PFAS detected |
| Marianna Waterworks | AR0000310 | Marianna | 3,238 | <MRL | <MRL | 0 | No PFAS detected |
| Marion Waterworks | AR0000152 | Marion | 14,185 | <MRL | <MRL | 0 | No PFAS detected |
| Marvell Waterworks | AR0000421 | Marvell | 1,000 | <MRL | <MRL | 0 | No PFAS detected |
| Mayflower Waterworks | AR0000193 | Mayflower | 7,390 | <MRL | <MRL | 0 | No PFAS detected |
| Mc Crory Waterworks | AR0000599 | Mc Crory | 1,736 | <MRL | <MRL | 0 | No PFAS detected |
| Mc Gehee Waterworks | AR0000170 | Mcgehee | 3,849 | <MRL | <MRL | 0 | No PFAS detected |
| Melbourne Waterworks | AR0000256 | Melbourne | 4,126 | <MRL | <MRL | 0 | No PFAS detected |
| Mena Water Department | AR0000438 | Mena | 5,604 | <MRL | <MRL | 0 | No PFAS detected |
| Mid-Arkansas Utilities P.W.A | AR0000725 | Cabot | 11,745 | <MRL | <MRL | 0 | No PFAS detected |
| Milltown-Washburn Water Users | AR0000773 | Greenwood | 4,325 | <MRL | <MRL | 0 | No PFAS detected |
| Monticello Water Department | AR0000184 | Monticello | 8,442 | <MRL | <MRL | 0 | No PFAS detected |
| Mount Olive Water Association | AR0000668 | Elkins | 6,308 | <MRL | <MRL | 0 | No PFAS detected |
| Mountain Home Waterworks | AR0000025 | Mountain Home | 19,618 | <MRL | <MRL | 0 | No PFAS detected |
| Mountain Top Water Association | AR0000454 | Heber Springs | 9,253 | <MRL | <MRL | 0 | No PFAS detected |
| Mountain View Waterworks | AR0000542 | Mountain View | 6,153 | <MRL | <MRL | 0 | No PFAS detected |
| N Garland Co Reg Water Dist | AR0000867 | Hot Springs | 7,913 | <MRL | <MRL | 0 | No PFAS detected |
| Nashville Rural Water Authority | AR0000805 | Nashville | 7,291 | <MRL | <MRL | 0 | No PFAS detected |
| Nashville Waterworks | AR0000244 | Nashville | 4,153 | <MRL | <MRL | 0 | Other PFAS detected |
| Ne Yell County Water Assoc | AR0000697 | Dardanelle | 7,198 | <MRL | <MRL | 0 | No PFAS detected |
| Newport Waterworks | AR0000264 | Newport | 6,204 | <MRL | <MRL | 0 | No PFAS detected |
| North East Public Water Auth | AR0000033 | Mountain Home | 4,665 | <MRL | <MRL | 0 | No PFAS detected |
| North White Co Rural Water Pfb | AR0000583 | Judsonia | 5,295 | <MRL | <MRL | 0 | No PFAS detected |
| Osceola Waterworks | AR0000375 | Osceola | 6,053 | <MRL | <MRL | 0 | No PFAS detected |
| Ozark Waterworks | AR0000201 | Ozark | 4,368 | <MRL | <MRL | 0 | No PFAS detected |
| Paragould Municipal Utilities | AR0000222 | Paragould | 31,188 | <MRL | <MRL | 0 | No PFAS detected |
| Paris Waterworks | AR0000328 | Paris | 4,935 | <MRL | <MRL | 0 | No PFAS detected |
| Pea Ridge Waterworks | AR0000053 | Pea Ridge | 12,795 | <MRL | <MRL | 0 | No PFAS detected |
| Piggott Waterworks | AR0000090 | Piggott | 4,620 | <MRL | <MRL | 0 | No PFAS detected |
| Pocahontas Waterworks | AR0000474 | Pocahontas | 7,752 | <MRL | <MRL | 0 | No PFAS detected |
| Pottsville Water Association | AR0000445 | Pottsville | 4,045 | <MRL | <MRL | 0 | No PFAS detected |
| Prairie Grove Waterworks | AR0000573 | Prairie Grove | 9,615 | <MRL | <MRL | 0 | No PFAS detected |
| Prescott Waterworks | AR0000394 | Prescott | 3,000 | <MRL | <MRL | 0 | No PFAS detected |
| Riversouth Rural Water Dist | AR0000674 | Ozark | 4,275 | <MRL | <MRL | 0 | No PFAS detected |
| Rogers Water Utilities | AR0000055 | Rogers | 81,443 | <MRL | <MRL | 0 | No PFAS detected |
| Salem Water Users Llc | AR0000492 | Benton | 22,775 | <MRL | <MRL | 0 | No PFAS detected |
| Salesville Community Water Association | AR0000036 | Salesville | 715 | <MRL | <MRL | 0 | No PFAS detected |
| Sardis Water Association | AR0000493 | Mabelvale | 15,660 | <MRL | <MRL | 0 | No PFAS detected |
| Se White County Water Assoc | AR0000594 | Searcy | 5,018 | <MRL | <MRL | 0 | No PFAS detected |
| Searcy Waterworks | AR0000590 | Searcy | 28,196 | <MRL | <MRL | 0 | No PFAS detected |
| Sevier Co Water Association | AR0000868 | Dequeen | 5,365 | <MRL | <MRL | 0 | No PFAS detected |
| Shannon Hills Water Dept | AR0000800 | Shannon Hills | 4,263 | <MRL | <MRL | 0 | No PFAS detected |
| Siloam Springs Waterworks | AR0000056 | Siloam Springs | 23,940 | <MRL | <MRL | 0.004 | Hazard Index below its limit |
| South Sheridan Water Assoc | AR0000219 | Sheridan | 3,887 | <MRL | <MRL | 0 | No PFAS detected |
| Southside Pub Water Authority | AR0000254 | Batesville | 9,108 | <MRL | <MRL | 0 | No PFAS detected |
| Southwest Water Users Llc | AR0000495 | Benton | 9,573 | <MRL | <MRL | 0 | No PFAS detected |
| Springdale Water Utilities | AR0000575 | Springdale | 100,795 | <MRL | <MRL | 0 | No PFAS detected |
| Stuttgart Waterworks | AR0000013 | Stuttgart | 7,393 | <MRL | <MRL | 0 | No PFAS detected |
| Sw Boone County Water Assoc | AR0000628 | Harrison | 4,558 | <MRL | <MRL | 0 | No PFAS detected |
| Sw White County Water Assn | AR0000185 | Searcy | 12,173 | <MRL | <MRL | 0 | No PFAS detected |
| Texarkana Water Utilities | AR0000360 | Texarkana | 50,815 | <MRL | <MRL | 0 | No PFAS detected |
| Tontitown Waterworks | AR0000566 | Tontitown | 7,355 | <MRL | <MRL | 0 | No PFAS detected |
| Tri-County Water Distbr Dist | AR0000782 | Russelville | 16,084 | <MRL | <MRL | 0 | No PFAS detected |
| Trumann Waterworks | AR0000435 | Trumann | 10,000 | <MRL | <MRL | 0 | No PFAS detected |
| Tuckerman Waterworks | AR0000266 | Tuckerman | 1,817 | <MRL | <MRL | 0 | No PFAS detected |
| Tumbling Shoals Water Assoc | AR0000579 | Tumbling Shoals | 6,608 | <MRL | <MRL | 0 | No PFAS detected |
| Us Air Force Base Little Rock | AR0000690 | Jacksonville | 8,618 | <MRL | <MRL | 0 | No PFAS detected |
| Van Buren County Pwa | AR0000727 | Clinton | 3,500 | <MRL | <MRL | 0 | No PFAS detected |
| Van Buren Waterworks | AR0000142 | Van Buren | 22,725 | <MRL | <MRL | 0 | No PFAS detected |
| Vilonia Waterworks | AR0000195 | Vilonia | 24,690 | <MRL | <MRL | 0 | No PFAS detected |
| Waldron Waterworks | AR0000498 | Waldron | 3,550 | <MRL | <MRL | 0 | No PFAS detected |
| Walnut Ridge Waterworks | AR0000309 | Walnut Ridge | 5,823 | <MRL | <MRL | 0 | No PFAS detected |
| Ward Waterworks | AR0000345 | Ward | 12,579 | <MRL | <MRL | 0 | No PFAS detected |
| Warren Waterworks | AR0000066 | Warren | 6,001 | <MRL | <MRL | 0 | No PFAS detected |
| Washington Water Authority Wwa | AR0000574 | Farmington | 20,140 | <MRL | <MRL | 0 | No PFAS detected |
| Washington Water System | AR0000232 | Hope | 142 | <MRL | <MRL | 0 | No PFAS detected |
| Watson Chapel Water Assoc | AR0000284 | Pine Bluff | 5,590 | <MRL | <MRL | 0 | No PFAS detected |
| West Helena Water Works | AR0000416 | Helena | 5,693 | <MRL | <MRL | 0 | No PFAS detected |
| West Memphis Waterworks | AR0000156 | West Memphis | 24,419 | <MRL | <MRL | 0 | No PFAS detected |
| West Stone County Water Assn | AR0000735 | Fox | 5,188 | <MRL | <MRL | 0 | Other PFAS detected |
| Western Greene County R W D | AR0000704 | Walcott | 7,095 | <MRL | <MRL | 0 | No PFAS detected |
| Wooster Waterworks | AR0000196 | Wooster | 5,000 | <MRL | <MRL | 0 | No PFAS detected |
| Wynne Waterworks | AR0000163 | Wynne | 8,391 | <MRL | <MRL | 0 | No PFAS detected |
| Yorktown Water Association | AR0000319 | Star City | 7,364 | <MRL | <MRL | 0 | No PFAS detected |
Not tested under UCMR 5 (511)
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 |
|---|---|---|---|---|---|
| Acorn Rural Water Assn | AR0000811 | CWS | Mena | 1,975 | Polk County |
| Adc - Tucker Unit Maint | AR0000282 | CWS | Grady | 2,000 | Jefferson County |
| Adc East Arkansas Regional | AR0000796 | CWS | Marianna | 1,650 | Lee County |
| Ahtd Marion County | ARN000129 | NTNCWS | Flippin | 25 | Marion County |
| Airport Road Water Association | AR0000663 | CWS | Lake Village | 525 | Chicot County |
| Albemarle Corporation South | ARN000022 | NTNCWS | Magnolia | 550 | Columbia County |
| Albemarle Corporation West | ARN000021 | NTNCWS | Magnolia | 150 | Columbia County |
| Alicia Water System | AR0000303 | CWS | Batesville | 146 | Lawrence County |
| Almyra Waterworks | AR0000006 | CWS | Almyra | 368 | Arkansas County |
| Alpena Waterworks | AR0000058 | CWS | Alpena | 568 | Boone County, Carroll County |
| Alpine Water Association | AR0000764 | CWS | Amity | 750 | Clark County |
| Altheimer Waterworks | AR0000271 | CWS | Altheimer | 765 | Jefferson County |
| Altus Waterworks | AR0000197 | CWS | Altus | 1,820 | Franklin County |
| Amity Waterworks | AR0000088 | CWS | Amity | 506 | Clark County |
| Ammunition Operations, Llc | ARN000057 | NTNCWS | Lonoke | 650 | Lonoke County |
| Antoine Waterworks | AR0000424 | CWS | Antoine | 563 | Clark County, Pike County |
| Ar Dept Of Correction Izard Co | AR0000790 | CWS | Calico Rock | 907 | Izard County |
| Ark St Park-Queen Wilhelmina | ART000045 | NTNCWS | Mena | 223 | Polk County |
| Ark State Park Mt Magazine | ART001110 | NTNCWS | Paris | 142 | Logan County |
| Arkansas City Waterworks | AR0000167 | CWS | Arkansas City | 360 | Desha County |
| Arkansas Health Center | AR0000485 | CWS | Benton | 700 | Saline County |
| Arsenal Water System | AR0000667 | CWS | White Hall | 600 | Jefferson County |
| Ash Flat Water Company | AR0000527 | CWS | Ash Flat | 1,186 | Fulton County, Sharp County |
| Augusta Waterworks | AR0000597 | CWS | Augusta | 2,228 | Woodruff County |
| Austin Waterworks | AR0000346 | CWS | Austin | 3,600 | Lonoke County |
| Autumn Acres Mhp | AR0000890 | CWS | Mountain Home | 68 | Baxter County |
| Bald Knob North Water Assoc | AR0000689 | CWS | Bald Knob | 2,610 | Jackson County, White County |
| Bald Knob Waterworks | AR0000584 | CWS | Bald Knob | 3,305 | White County |
| Banks Waterworks | AR0000068 | CWS | El Dorado | 244 | Bradley County |
| Barkada Water Association | AR0000785 | CWS | Wilmar | 403 | Drew County |
| Basin Valley Water System | AR0000819 | CWS | Harrison | 513 | Newton County |
| Bauxite Water | AR0000497 | CWS | Bauxite | 705 | Saline County |
| Baxter Marion Regional Water Association | AR0001178 | CWS | Oakland | 465 | Baxter County, Marion County |
| Bay Waterworks | AR0000129 | CWS | Bay | 1,938 | Craighead County |
| Bearden Waterworks | AR0000401 | CWS | Bearden | 2,511 | Dallas County, Ouachita County |
| Beaver Water District | AR0000038 | CWS | Lowell | 66 | Benton County |
| Beedeville Water Works | AR0000262 | CWS | Beedeville | 98 | Jackson County |
| Bellefonte Water | AR0000059 | CWS | Everton | 503 | Boone County |
| Belleville Water | AR0000600 | CWS | Belleville | 1,103 | Yell County |
| Ben Lomond Waterworks | AR0000519 | CWS | Ben Lomond | 210 | Sevier County |
| Benton County Water Authority4 | AR0000899 | CWS | Lowell | 673 | Benton County |
| Benton County Water Authority5 | AR0000913 | CWS | Lowell | 1,900 | Benton County |
| Benton-Washington Regional Pwa | AR0000871 | CWS | Rogers | 30 | Benton County, Washington County |
| Bergman Waterworks | AR0000060 | CWS | Bergman | 3,285 | Boone County |
| Big Flat Waterworks | AR0000026 | CWS | Big Flat | 523 | Baxter County, Searcy County, Stone County |
| Bigelow Waterworks | AR0000411 | CWS | Perryville | 605 | Perry County |
| Biggers Waterworks | AR0000476 | CWS | Biggers | 404 | Randolph County |
| Birdsong Whitton Water Assoc | AR0000417 | CWS | Blytheville | 431 | Mississippi County |
| Biscoe Waterworks | AR0000448 | CWS | Biscoe | 463 | Prairie County |
| Black Oak Waterworks | AR0000123 | CWS | Lake City | 245 | Craighead County |
| Black Rock Waterworks | AR0000302 | CWS | Black Rock | 1,807 | Lawrence County |
| Blevins Waterworks | AR0000233 | CWS | Blevins | 383 | Hempstead County |
| Blue Mountain Waterworks | AR0000638 | CWS | Blue Mountain | 357 | Logan County, Yell County |
| Bluebird Water, Llc | AR0000799 | CWS | Eureka Springs | 205 | Carroll County |
| Bodcaw Rural Water System | AR0000887 | CWS | Rosston | 1,430 | Hempstead County, Nevada County |
| Bonanza Waterworks | AR0000979 | CWS | Bonanza | 610 | Sebastian County |
| Bono Waterworks | AR0000126 | CWS | Bono | 2,550 | Craighead County |
| Booneville Development Center | AR0000336 | CWS | Booneville | 275 | Logan County |
| Bowser Water Assn | AR0000179 | CWS | Monticello | 635 | Drew County |
| Bradford Waterworks | AR0000587 | CWS | Bradford | 986 | White County |
| Bradley Waterworks | AR0000294 | CWS | Bradley | 567 | Lafayette County |
| Branch Water Works | AR0000653 | CWS | Branch | 500 | Franklin County |
| Breckenridge Union Water Assoc | AR0000223 | CWS | Bradford | 1,225 | Jackson County, Woodruff County |
| Briarcliff Waterworks | AR0000024 | CWS | Mountain Home | 338 | Baxter County |
| Brookland Waterworks | AR0000131 | CWS | Brookland | 4,283 | Craighead County |
| Brunner Hill Public Water Authority | AR0000837 | CWS | Jordan | 1,325 | Baxter County, Izard County |
| Buckner Waterworks | AR0000295 | CWS | Buckner | 290 | Lafayette County |
| Buena Vista-Ogemaw Water Association | AR0000737 | CWS | Camden | 384 | Ouachita County |
| Bull Shoals Water System | AR0000352 | CWS | Bull Shoals | 2,835 | Marion County |
| Burdette Waterworks | AR0000366 | CWS | Burdette | 798 | Mississippi County |
| Caddo Valley Waterworks | AR0000515 | CWS | Caddo Valley | 595 | Clark County |
| Caldwell Water | AR0000532 | CWS | Caldwell | 1,585 | St. Francis County |
| Calhoun County Water Assn | AR0000919 | CWS | Hampton | 1,591 | Calhoun County |
| Calico Rock Waterworks | AR0000003 | CWS | Calico Rock | 1,726 | Izard County |
| Calion Water Works | AR0000551 | CWS | Calion | 494 | Union County |
| Camp Robinson | AR0000877 | CWS | North Little Rock | 1,500 | Pulaski County |
| Campbell Station Waterworks | AR0000261 | CWS | Tuckerman | 230 | Jackson County |
| Caraway Waterworks | AR0000127 | CWS | Caraway | 1,432 | Craighead County |
| Carlisle Waterworks | AR0000339 | CWS | Carlisle | 2,300 | Lonoke County |
| Carroll-Boone Water District | AR0000675 | CWS | Eureka Springs | 20 | Boone County, Carroll County |
| Carthage Forest Products | AR0001254 | NTNCWS | Carthage | 140 | Dallas County |
| Carthage Water And Sewer | AR0000165 | CWS | Fordyce | 345 | Dallas County |
| Casa Water Dept | AR0000660 | CWS | Casa | 1,153 | Conway County, Perry County, Yell County |
| Cash Waterworks | AR0000130 | CWS | Cash | 342 | Craighead County |
| Cave City Waterworks | AR0000526 | CWS | Cave City | 3,045 | Independence County, Sharp County |
| Central Arkansas Water Paron | AR0000883 | CWS | Little Rock | 2,025 | Hot Spring County, Saline County |
| Central City Water Department | AR0000503 | CWS | Central City | 1,227 | Sebastian County |
| Central Logan County Pwfb | AR0000845 | CWS | Paris | 1,268 | Logan County |
| Charleston Waterworks | AR0000200 | CWS | Charleston | 3,386 | Franklin County, Sebastian County |
| Cherry Valley Waterworks | AR0000158 | CWS | Cherry Valley | 650 | Cross County |
| Chester Water Works | AR0000647 | CWS | Alma | 223 | Crawford County |
| Chicot Junction Water Assoc | AR0000661 | CWS | Lake Village | 616 | Chicot County |
| Chidester Water Works | AR0000403 | CWS | Chidester | 336 | Ouachita County |
| Christian Ministry Academy | ARN000237 | NTNCWS | Hot Springs Village | 300 | Garland County |
| Clarendon Waterworks | AR0000385 | CWS | Clarendon | 1,320 | Monroe County |
| Clark County Country Water Facilities | AR0000741 | CWS | Arkadelphia | 2,590 | Clark County |
| Clarkedale-Jericho Water Assoc | AR0000148 | CWS | Proctor | 925 | Crittenden County |
| Clearwater Paper Corporation | ARN000052 | NTNCWS | Mc Gehee | 339 | Desha County |
| Cleveland Co Rural Water Users Assoc | AR0000069 | CWS | Rison | 2,244 | Cleveland County, Jefferson County |
| Coal Hill Waterworks | AR0000290 | CWS | Coal Hill | 1,372 | Johnson County |
| Collins Water Association | AR0000181 | CWS | Dermott | 214 | Drew County |
| Colt Water Association | AR0000533 | CWS | Colt | 997 | Cross County, St. Francis County |
| Compton Waterworks | AR0000669 | CWS | Compton | 1,038 | Madison County, Newton County |
| Concord Water & Sewer Pfb Of Crawford Co | AR0000147 | CWS | Van Buren | 3,071 | Crawford County |
| Corinth Valley Water System | AR0000927 | CWS | Warren | 33 | Bradley County |
| Cotter Waterworks | AR0000028 | CWS | Cotter | 1,233 | Baxter County |
| Cotton Plant Waterworks | AR0000596 | CWS | Cotton Plant | 893 | Monroe County, Woodruff County |
| Cottonshed Waterworks | AR0000620 | CWS | Texarkana | 62 | Howard County |
| Cottonwood Water Association | AR0000813 | CWS | Harrison | 820 | Boone County |
| Cove Waterworks | AR0000439 | CWS | Cove | 651 | Polk County |
| Coy Waterworks | AR0000340 | CWS | Humnoke | 218 | Lonoke County |
| Crawfordsville Waterworks | AR0000149 | CWS | Crawfordsville | 2,103 | Crittenden County |
| Crestwood Mobile Home Park | AR0000873 | CWS | Mountain Home | 48 | Baxter County |
| Cushman Water System | AR0000249 | CWS | Batesville | 1,423 | Independence County |
| Damascus Water Works | AR0000190 | CWS | Damascus | 2,235 | Faulkner County, Van Buren County |
| Danville Waterworks | AR0000603 | CWS | Danville | 2,810 | Yell County |
| Deer Run Water Company | AR0000685 | CWS | Batesville | 119 | Sharp County |
| Deer Water Association | AR0000670 | CWS | Deer | 938 | Newton County |
| Delaplaine Waterworks | AR0000224 | CWS | Mc Dougal | 183 | Greene County |
| Delight Waterworks | AR0000423 | CWS | Delight | 1,577 | Pike County |
| Dell Waterworks | AR0000367 | CWS | Dell | 1,077 | Mississippi County |
| Denning Waterworks | AR0000199 | CWS | Ozark | 712 | Franklin County |
| Dermott Waterworks | AR0000082 | CWS | Mcgehee | 2,604 | Chicot County, Desha County |
| Devalls Bluff Waterworks | AR0000450 | CWS | Devalls Bluff | 600 | Prairie County |
| Dewitt Waterworks | AR0000008 | CWS | Dewitt | 3,208 | Arkansas County |
| Diamond City Water | AR0000061 | CWS | Diamond City | 1,290 | Boone County |
| Diaz Waterworks | AR0000269 | CWS | New Port | 1,215 | Jackson County |
| Dierks Water Works | AR0000243 | CWS | Dierks | 1,317 | Howard County |
| Dogwood Water Association | AR0000585 | CWS | Blytheville | 1,345 | Mississippi County |
| Dorcheat Water Association | AR0000714 | CWS | Magnolia | 1,860 | Columbia County |
| Dota Public Water Authority | AR0000698 | CWS | Cord | 2,722 | Independence County |
| Dover Waterworks | AR0000444 | CWS | Dover | 1,797 | Pope County |
| Dyer Waterworks | AR0000143 | CWS | Dyer | 1,028 | Crawford County |
| Dyess Rural Water | AR0000730 | CWS | Dyess | 254 | Mississippi County |
| Dyess Waterworks | AR0000376 | CWS | Dyess | 430 | Mississippi County |
| E Cass Water Supply Corp | AR0000886 | CWS | Bivins | 150 | Miller County |
| Earle Waterworks | AR0000150 | CWS | Earle | 1,305 | Crittenden County |
| East Logan Co Rural Water | AR0000809 | CWS | New Blaine | 2,263 | Logan County |
| East Monroe County Water Users | AR0000715 | CWS | Brinkley | 833 | Monroe County |
| East Newton County Water Assn | AR0000768 | CWS | Vendor | 1,920 | Newton County |
| East Prairie County Pwa | AR0000458 | CWS | Batesville | 545 | Prairie County, Woodruff County |
| Edgewood Bay Water | AR0000350 | CWS | Lakeview | 308 | Baxter County |
| Elaine Waterworks | AR0000418 | CWS | Elaine | 1,233 | Desha County, Phillips County |
| Emerson Waterworks | AR0000111 | CWS | Emerson | 1,145 | Columbia County |
| Emmet Waterworks | AR0000393 | CWS | Emmet | 550 | Hempstead County, Nevada County |
| England Waterworks | AR0000341 | CWS | England | 3,128 | Lonoke County |
| Enon Water Association | AR0000183 | CWS | Monticello | 488 | Drew County |
| Entergy - Independence | ARN000009 | NTNCWS | Newark | 150 | Independence County |
| Eudora Waterworks | AR0000083 | CWS | Eudora | 2,600 | Chicot County |
| Evening Shade Waterworks | AR0000525 | CWS | Evening Shade | 750 | Sharp County |
| Faircrest Water Association | AR0000544 | CWS | El Dorado | 1,329 | Union County |
| Fcmtc Waterworks | AR0000514 | CWS | Fort Chaffee | 500 | Sebastian County |
| Felsenthal Water And Sewer | AR0000545 | CWS | Felsenthal | 150 | Union County |
| Fifty Six Waterworks | AR0000046 | CWS | Fifty Six | 593 | Stone County |
| Fordyce Rural Water Assoc | AR0000635 | CWS | Fordyce | 1,274 | Calhoun County, Dallas County |
| Foreman Waterworks | AR0000323 | CWS | Foreman | 1,011 | Little River County |
| Fouke Waterworks | AR0000358 | CWS | Fouke | 955 | Miller County |
| Fountain Hill Waterworks | AR0000016 | CWS | Fountain Hill | 1,028 | Ashley County |
| Franklin Waterworks | AR0000257 | CWS | Franklin | 192 | Izard County, Sebastian County |
| Franklin-Sebastian Pwa | AR0001077 | CWS | Lavaca | 0 | Sebastian County |
| Freedom Public Water Authority | AR0000812 | CWS | Mena | 1,935 | Polk County |
| Frenchport Water Association | AR0000636 | CWS | Smackover | 1,793 | Ouachita County |
| Fulton County Water Authori | AR0000814 | CWS | Salem | 2,411 | Fulton County |
| Fulton Waterworks | AR0000231 | CWS | Emmet | 379 | Hempstead County |
| Furlow Public Water Authority | AR0000645 | CWS | Cabot | 3,138 | Lonoke County |
| Garfield Waterworks | AR0000047 | CWS | Garfield | 788 | Benton County |
| Garland Towers Apartments | AR0001266 | NTNCWS | Hot Springs | 74 | Garland County |
| Garland Waterworks | AR0000357 | CWS | Garland | 342 | Miller County |
| Gassville Waterworks | AR0000034 | CWS | Gassville | 2,058 | Baxter County |
| Gateway Public Water Authority | AR0000693 | CWS | Gateway | 2,325 | Benton County |
| Gentryville Public Water Auth | AR0000699 | CWS | Ash Flat | 469 | Sharp County |
| Georgia Pacific Wood Products Llc | ARN000214 | NTNCWS | Fordyce | 135 | Calhoun County |
| Gillett Water Dept | AR0000009 | CWS | Gillett | 655 | Arkansas County |
| Gillham Regional Water Dist | AR0000658 | CWS | Wicks | 3 | Polk County |
| Gillham Waterworks | AR0000516 | CWS | Gillham | 255 | Sevier County |
| Gilmore Waterworks | AR0000154 | CWS | Wynne | 248 | Crittenden County |
| Glen Acres | AR0000857 | CWS | Rogers | 68 | Carroll County |
| Glenwood Water Department | AR0000422 | CWS | Glenwood | 2,073 | Montgomery County, Pike County |
| Gosnell Water Association | AR0000374 | CWS | Gosnell | 3,083 | Mississippi County |
| Gould Municipal Water-Sewer | AR0000316 | CWS | Gould | 837 | Lincoln County |
| Grady Waterworks | AR0000317 | CWS | Grady | 313 | Lincoln County |
| Grange-Calamine Water Assoc | AR0000759 | CWS | Cave City | 3,015 | Independence County, Sharp County |
| Grannis Waterworks | AR0000437 | CWS | Grannis | 548 | Polk County |
| Grassy Knob Subordinate Sd | ART001101 | CWS | Fayetteville | 88 | Carroll County |
| Gray Rock Water Association | AR0000076 | CWS | Paris | 750 | Logan County |
| Greasy Valley Wpfb Logan Co. | AR0000696 | CWS | Paris | 700 | Logan County |
| Green Hill-Brooks Chapel Water | AR0000701 | CWS | Monticello | 597 | Drew County |
| Greenway Waterworks | AR0000097 | CWS | Piggott | 322 | Clay County |
| Grubbs Waterworks | AR0000267 | CWS | Grubbs | 823 | Craighead County, Jackson County |
| Guion Water Department | AR0000626 | CWS | Pleasant Grove | 268 | Izard County |
| Gurdon Waterworks | AR0000087 | CWS | Gurdon | 2,988 | Clark County |
| Hackett Waterworks | AR0000505 | CWS | Hackett | 1,090 | Sebastian County |
| Hampton Waterworks | AR0000070 | CWS | Hampton | 1,906 | Calhoun County |
| Hardy Waterworks | AR0000524 | CWS | Hardy | 1,101 | Sharp County |
| Harmony Grove Water Assoc | AR0000402 | CWS | Camden | 2,192 | Ouachita County |
| Harmony Water Association | AR0000546 | CWS | El Dorado | 336 | Union County |
| Harrell Waterworks | AR0000071 | CWS | Harrell | 251 | Calhoun County |
| Hatfield Waterworks | AR0000436 | CWS | Hatfield | 641 | Polk County |
| Havana Waterworks | AR0000602 | CWS | Havana | 1,411 | Yell County |
| Hazen Waterworks | AR0000452 | CWS | Hazen | 1,838 | Prairie County |
| Heafer-Black Oak Water Assoc | AR0000427 | CWS | Proctor | 436 | Crittenden County, Poinsett County |
| Hermitage Waterworks | AR0000067 | CWS | Hermitage | 830 | Bradley County |
| Hickory Ridge Waterworks | AR0000159 | CWS | Hickory Ridge | 424 | Cross County |
| Highfill Water Department | AR0000885 | CWS | Highfall | 3,970 | Benton County |
| Highland Water Association | AR0000672 | CWS | Hardy | 2,390 | Fulton County, Sharp County |
| Holly Grove Waterworks | AR0000388 | CWS | Holly Grove | 1,557 | Monroe County |
| Horatio Waterworks | AR0000518 | CWS | Horatio | 1,278 | Sevier County |
| Horseshoe Bend Waterworks | AR0000255 | CWS | Horseshoe Bend | 3,217 | Izard County |
| Horseshoe Lake Utilities | AR0000151 | CWS | Horseshoe Lake | 603 | Crittenden County |
| Hosanna Heights Water | AR0000884 | CWS | Mammoth Spring | 52 | Fulton County |
| Houston Waterworks | AR0000414 | CWS | Perryville | 808 | Perry County |
| Hoxie Water Department | AR0000301 | CWS | Hoxie | 2,666 | Lawrence County |
| Hughes Community Water Assoc | AR0000011 | CWS | Hughes | 2,195 | Crittenden County, Cross County, Lee County, St. Francis County |
| Hughes Waterworks | AR0000531 | CWS | Hughes | 987 | St. Francis County |
| Humphrey Waterworks | AR0000010 | CWS | Humphrey | 578 | Arkansas County, Jefferson County |
| Huntington Waterworks | AR0000508 | CWS | Huntington | 782 | Sebastian County |
| Huntsville Waterworks | AR0000348 | CWS | Huntsville | 3,648 | Madison County |
| Huttig Waterworks | AR0000553 | CWS | Huttig | 733 | Union County |
| Hwy 4 24 Water Association | AR0000765 | CWS | Camden | 2,135 | Nevada County, Ouachita County |
| Hwy 64 Water Association | AR0000749 | CWS | Crawfordsville | 215 | Crittenden County |
| Imboden Waterworks | AR0000300 | CWS | Imboden | 825 | Lawrence County |
| Independence Jackson Regional | AR0000774 | CWS | Bradford | 2,922 | Independence County, Jackson County, White County |
| Indian Switch Rural Water Assn | AR0000781 | CWS | Eudora | 670 | Chicot County |
| Jacksonport Waterworks | AR0000263 | CWS | Jacksonport | 233 | Jackson County |
| Jasper Waterworks | AR0000397 | CWS | Jasper | 580 | Newton County |
| Jefferson Public Water Authority | AR0000276 | CWS | Jefferson | 2,551 | Jefferson County |
| Johnson Township Water Assoc | AR0000640 | CWS | Strong | 600 | Union County |
| Joiner Rural Water | AR0000377 | CWS | Joiner | 343 | Mississippi County |
| Joiner Waterworks | AR0000372 | CWS | Osceola | 486 | Mississippi County |
| Judsonia Waterworks | AR0000582 | CWS | Judsonia | 2,956 | White County |
| Junction City Waterworks | AR0000552 | CWS | Junction City | 726 | Union County |
| Keiser Waterworks | AR0000373 | CWS | Keiser | 810 | Mississippi County |
| Kelso-Rohwer Water Association | AR0000168 | CWS | Rohwer | 563 | Desha County |
| Kensett Waterworks | AR0000588 | CWS | Kensett | 1,624 | White County |
| Keo Water Works | AR0000337 | CWS | Keo | 388 | Lonoke County |
| Kibler Water System | AR0000140 | CWS | Van Buren | 1,753 | Crawford County |
| Kings Hill Estates | AR0000827 | CWS | Fayetteville | 28 | Carroll County |
| Kingsland Waterworks | AR0000108 | CWS | Kingsland | 447 | Cleveland County |
| Knobel Waterworks | AR0000099 | CWS | Knobel | 249 | Clay County |
| Knoxville Waterworks | AR0000287 | CWS | Knoxville | 2,087 | Johnson County |
| Krooked Kreek Water Assn | AR0000706 | CWS | Harrison | 2,275 | Boone County, Newton County |
| Lacey-Ladelle Water Associatio | AR0000684 | CWS | Monticello | 1,438 | Drew County |
| Ladd Water Association | AR0000277 | CWS | Pine Bluff | 1,773 | Jefferson County, Lincoln County |
| Lafe Regional Water Distribution Distric | AR0000483 | CWS | Marmaduke | 2,583 | Clay County, Greene County |
| Lake Bull Shoals Estates Water | AR0000031 | CWS | Lead Hill | 60 | Marion County |
| Lake Chicot Water Supply Association | AR0000080 | CWS | Lake Village | 1,909 | Chicot County |
| Lake City Waterworks | AR0000122 | CWS | Lake City | 2,186 | Craighead County |
| Lake Forest Subordinate Dist | AR0000677 | CWS | Fayetteville | 125 | Carroll County |
| Lake Lucerne Estates | AR0000780 | CWS | Eureka Springs | 65 | Carroll County |
| Lake View Municipal Water | AR0000420 | CWS | Lake View-Phillips | 665 | Phillips County |
| Lake Village Waterworks | AR0000081 | CWS | Lake Village | 2,065 | Chicot County |
| Lakeshore Estates Water Assn | AR0000726 | CWS | Crawfordsville | 568 | Crittenden County |
| Lakeside Water Association | AR0000822 | CWS | Waldo | 1,876 | Columbia County |
| Lamar Waterworks | AR0000288 | CWS | Lamar | 1,885 | Johnson County |
| Lanxess Corporation | ARN000029 | NTNCWS | El Dorada | 144 | Union County |
| Laurelwood Homeowners Association | AR0000793 | CWS | Henderson | 105 | Baxter County |
| Lawson-Urbana Water Assoc | AR0000548 | CWS | El Dorado | 1,108 | Union County |
| Leachville Waterworks | AR0000362 | CWS | Leachville | 2,030 | Mississippi County |
| Lead Hill Waterworks | AR0000063 | CWS | Lead Hill | 550 | Boone County |
| Leatherwood View Estates | AR0001091 | CWS | Springdale | 38 | Carroll County |
| Leisure Hills Mobile Home Park | AR0000747 | CWS | Siloam Springs | 113 | Benton County |
| Leola Waterworks | AR0000218 | CWS | Leola | 564 | Grant County |
| Lepanto Waterworks | AR0000432 | CWS | Lepanto | 2,231 | Mississippi County, Poinsett County |
| Leslie Water System | AR0000500 | CWS | Leslie | 730 | Searcy County |
| Lewisville Waterworks | AR0000297 | CWS | Lewisville | 1,951 | Lafayette County |
| Liberty - Woodson / Hensley Wat | AR0000471 | CWS | Pine Bluff | 963 | Pulaski County, Saline County |
| Lisbon Water Association | AR0000716 | CWS | El Dorado | 439 | Union County |
| Little Explorers Cdc | AR0001243 | NTNCWS | Ash Flat | 42 | Fulton County |
| Little Portion Hermitage | AR0000808 | CWS | Berryville | 25 | Carroll County |
| Little River Country Club | AR0000467 | CWS | Foreman | 120 | Little River County |
| Little River Water Association | AR0000371 | CWS | Osceola | 619 | Mississippi County |
| Locke-Fern Dollard Rd Ww Pfb | AR0000912 | CWS | Mountainburg | 1,135 | Crawford County, Franklin County |
| Lockesburg Waterworks | AR0000517 | CWS | Lockesburg | 739 | Sevier County |
| Locust Bayou Water Association | AR0000102 | CWS | Camden | 531 | Calhoun County |
| London Waterworks | AR0000443 | CWS | London | 1,443 | Pope County |
| Long Lake Water Association | AR0000274 | CWS | Helena | 188 | Phillips County |
| Lonoke White Public Water Authority | AR0001076 | CWS | Quitman | 0 | Cleburne County, Faulkner County, Lonoke County, White County |
| Lost Bridge Vill Wat-Sew Dists | AR0000049 | CWS | Garfield | 1,010 | Benton County |
| Louann Waterworks | AR0000406 | CWS | El Dorado | 170 | Ouachita County |
| Ludwig Water Association | AR0000292 | CWS | Clarksville | 1,610 | Johnson County |
| Lurton-Pelsor Water Assoc | AR0000718 | CWS | Pelsor | 353 | Newton County, Pope County |
| Luxora Waterworks | AR0000361 | CWS | Luxora | 868 | Mississippi County |
| Lydesdale Water Association | AR0000713 | CWS | Stephens | 405 | Columbia County |
| Lynn Waterworks | AR0000299 | CWS | Lynn | 773 | Lawrence County |
| Madison Co Regional Water | AR0000803 | CWS | Rogers | 4 | Benton County, Carroll County, Madison County |
| Magazine Waterworks | AR0000327 | CWS | Magazine | 1,000 | Logan County |
| Magness Water Association | AR0000246 | CWS | Newark | 391 | Independence County |
| Magnet-Butterfield Water Authority | AR0000241 | CWS | Malvern | 1,950 | Hot Spring County |
| Mammoth Spring Waterworks | AR0000206 | CWS | Mammoth Spring | 1,777 | Fulton County |
| Mansfield Waterworks | AR0000509 | CWS | Mansfield | 2,367 | Scott County, Sebastian County |
| Marion County Reg Water Dist | AR0000770 | CWS | Bull Shoals | 0 | Marion County |
| Marked Tree Waterworks | AR0000430 | CWS | Marked Tree | 2,610 | Poinsett County |
| Marmaduke Waterworks | AR0000225 | CWS | Marmaduke | 1,410 | Greene County |
| Marshall Waterworks | AR0000501 | CWS | Marshall | 2,595 | Searcy County |
| Marvell Rural Water Assoc | AR0000637 | CWS | Marvell | 1,305 | Monroe County, Phillips County |
| Marysville Water Association | AR0000001 | CWS | Mount Holly | 867 | Union County |
| Maumelle Water Corporation | AR0000464 | CWS | Roland | 2,832 | Pulaski County |
| Maynard Waterworks | AR0000619 | CWS | Maynard | 375 | Randolph County |
| Mc Dougal Waterworks | AR0000098 | CWS | Mc Dougal | 271 | Clay County |
| Mc Neil Rural Water Assoc | AR0000705 | CWS | Mc Neil | 900 | Columbia County |
| Mc Neil Waterworks | AR0000110 | CWS | Mc Neil | 515 | Columbia County |
| Mc Rae Waterworks | AR0000589 | CWS | Mccrae | 870 | White County |
| Midway Water Association | AR0000153 | CWS | Proctor | 1,899 | Crittenden County |
| Mill Pond Village Mhp | AR0000786 | CWS | Hot Springs | 288 | Garland County |
| Miller County Public Water Authority | AR0001141 | CWS | Texarkana | 803 | Miller County |
| Millwood Water Corporation | AR0000409 | CWS | Ashdown | 545 | Little River County |
| Mineral Springs Waterworks | AR0000242 | CWS | Mineral Springs | 1,364 | Howard County |
| Mitchellville Waterworks | AR0000169 | CWS | Dumas | 293 | Desha County |
| Mockingbird Hill Water Assoc | AR0000042 | CWS | Jasper | 875 | Newton County |
| Monette Waterworks | AR0000128 | CWS | Monette | 1,385 | Craighead County |
| Montgomery Co Regional Pwa | AR0000951 | CWS | Mount Ida | 0 | Montgomery County |
| Montrose Boydell Water System | AR0000014 | CWS | Montrose | 473 | Ashley County, Drew County |
| Morning Star Public Water Authority | AR0000681 | CWS | Marshall | 1,575 | Searcy County |
| Moro Waterworks | AR0000314 | CWS | Moro | 219 | Lee County |
| Morrison Bluff Water System | AR0000709 | CWS | Scranton | 312 | Logan County |
| Mount Holly Waterworks | AR0000002 | CWS | El Dorado | 384 | Union County |
| Mount Ida Waterworks | AR0000392 | CWS | Mount Ida | 3,218 | Montgomery County |
| Mountain Development | AR0000932 | NTNCWS | Sulphur Springs | 50 | Benton County |
| Mountain Pine Waterworks | AR0000176 | CWS | Mountain Pine | 805 | Garland County |
| Mountainburg Water And Sewer | AR0000141 | CWS | Mountainburg | 1,052 | Crawford County |
| Mt Pleasant Waterworks | AR0000258 | CWS | Mount Pleasant | 1,338 | Izard County, Sharp County |
| Mt Sherman Water Association | AR0000680 | CWS | Deer | 903 | Newton County |
| Mulberry Waterworks | AR0000136 | CWS | Mulberry | 1,648 | Crawford County |
| Mundell Heights Waterworks | AR0000633 | CWS | Eureka Springs | 203 | Carroll County |
| Murfreesboro Waterworks | AR0000425 | CWS | Murfreesboro | 1,645 | Pike County |
| N E White County Public Facilities Board | AR0001069 | CWS | Searcy | 0 | White County |
| Nail-Swain Water Association | AR0000856 | CWS | Deer | 970 | Johnson County, Newton County |
| Nat Ctr For Toxicological Res | ARN000046 | NTNCWS | Jefferson | 600 | Jefferson County |
| Ne Mississippi Co Water Assoc | AR0000673 | CWS | Blytheville | 1,040 | Mississippi County |
| Neapwa | AR0001070 | CWS | Pocahontas | 25 | Lawrence County, Randolph County |
| New Hope Water Association | AR0000683 | CWS | Junction City | 1,136 | Union County |
| New London Water Association | AR0000557 | CWS | Strong | 850 | Union County |
| Newark Waterworks | AR0000248 | CWS | Newark | 1,091 | Independence County |
| Norfork Waterworks | AR0000035 | CWS | Norfork | 1,003 | Baxter County |
| Norman Waterworks | AR0000391 | CWS | Norman | 750 | Montgomery County |
| Norphlet Waterworks | AR0000554 | CWS | Norphlet | 1,112 | Union County |
| North Crossett Utilities | AR0000022 | CWS | Crossett | 3,222 | Ashley County |
| North Howard Rural Water Association | AR0001075 | CWS | Umpire | 710 | Howard County |
| North Jackson Co Rural Water Assn | AR0000767 | CWS | Tuckerman | 807 | Jackson County |
| North Lagrue Water Assoc | AR0000012 | CWS | Dewitt | 284 | Arkansas County |
| North Pike Co Rural Water Assn | AR0000826 | CWS | Kirby | 1,932 | Pike County |
| Northeast Dewitt Water Assoc | AR0000007 | CWS | Dewitt | 610 | Arkansas County |
| Northern Ohio Water Assoc | AR0000175 | CWS | Proctor | 720 | Poinsett County |
| Nw Arkansas Regional Airport | ARN000188 | NTNCWS | Rogers | 3,538 | Benton County |
| O Kean Waterworks | AR0000473 | CWS | Mcdougal | 230 | Randolph County |
| Oak Grove Water | AR0000801 | CWS | Oak Grove | 485 | Carroll County |
| Oak Grove Water Association | AR0000146 | CWS | Van Buren | 2,963 | Crawford County |
| Oak Manor Water Association | AR0000558 | CWS | El Dorado | 338 | Union County |
| Oakhills Surb Improvment Dist | AR0000676 | CWS | Bentonville | 133 | Benton County |
| Oden-Pencil Bluff Water Assn | AR0000616 | CWS | Oden | 393 | Montgomery County |
| Ogden Waterworks | AR0000322 | CWS | Ogden | 495 | Little River County |
| Oil Trough Waterworks | AR0000247 | CWS | Oil Trough | 235 | Independence County |
| Okolona Waterworks | AR0000089 | CWS | Okolona | 562 | Clark County |
| Ola Waterworks | AR0000604 | CWS | Ola | 1,204 | Yell County |
| Old Bella Vista Poa | AR0000753 | CWS | Bella Vista | 83 | Benton County |
| Old Union Public Water Authority | AR0000559 | CWS | El Dorado | 1,200 | Union County |
| Omaha Waterworks | AR0000064 | CWS | Omaha | 1,188 | Boone County |
| Oppelo Water Department | AR0000120 | CWS | Oppelo | 1,300 | Conway County |
| Outside Kingsland Water Assoc | AR0000802 | CWS | Fordyce | 308 | Cleveland County, Dallas County |
| Oxford Waterworks | AR0000259 | CWS | Oxford | 1,402 | Izard County |
| Ozan Creek Water System | AR0001078 | CWS | Blevins | 787 | Hempstead County |
| Ozan Waterworks | AR0000227 | CWS | Ozan | 425 | Hempstead County |
| Ozark Acres Water Association | AR0000530 | CWS | Bates Ville | 830 | Sharp County |
| Ozark Mtn Regional Pwa | AR0000998 | CWS | Lead Hill | 0 | Boone County, Marion County, Newton County, Searcy County |
| Palestine Water Association | AR0000536 | CWS | Palestine | 1,649 | St. Francis County |
| Pangburn Waterworks | AR0000580 | CWS | Pangburn | 2,936 | White County |
| Parkdale Waterworks | AR0000019 | CWS | Wilmot | 377 | Ashley County |
| Parkers Chapel Public Water | AR0000560 | CWS | El Dorado | 2,391 | Union County |
| Parkin Rural Public Water Authority | AR0000662 | CWS | Earle | 323 | Crittenden County, Cross County |
| Parkin Waterworks | AR0000160 | CWS | Blytheville | 1,045 | Cross County |
| Parthenon Water Association | AR0000736 | CWS | Deer | 408 | Newton County |
| Patterson Waterworks | AR0000598 | CWS | Patterson | 455 | Woodruff County |
| Peach Orchard Waterworks | AR0000091 | CWS | Mc Dougal | 168 | Clay County |
| Peco Foods | AR0001206 | NTNCWS | Pocahontas | 30 | Randolph County |
| Pendleton-Pea Ridge Water Assn | AR0000649 | CWS | Dumas | 845 | Desha County |
| Perry Water System | AR0000412 | CWS | Perry | 736 | Perry County |
| Perrytown Waterworks | AR0000234 | CWS | Hope | 160 | Hempstead County |
| Perryville Waterworks | AR0000413 | CWS | Perryville | 5,550 | Perry County, Pulaski County |
| Pfeiffer Water Authority | AR0000251 | CWS | Batesville | 3,343 | Independence County |
| Pickens Waterworks | AR0000172 | CWS | Pickens | 49 | Desha County |
| Pike City Water Assn | AR0000818 | CWS | Murfreesboro | 333 | Pike County |
| Pine Top Water Facilities Board | AR0001240 | CWS | Rogers | 55 | Benton County |
| Pleasant Grove | AR0000720 | CWS | Pleasant Grove | 2,728 | Cleburne County, Stone County |
| Pleasant View Water Fac Board | AR0000202 | CWS | Mulberry | 1,938 | Crawford County, Franklin County |
| Plumerville Waterworks | AR0000121 | CWS | Plumerville | 1,440 | Conway County |
| Pollard Waterworks | AR0000092 | CWS | Pollard | 247 | Clay County |
| Portia Waterworks | AR0000305 | CWS | Portia | 625 | Lawrence County |
| Portland Waterworks | AR0000018 | CWS | Portland | 625 | Ashley County |
| Poyen Waterworks | AR0000217 | CWS | Malvern | 875 | Grant County |
| Prattsville Waterworks | AR0000216 | CWS | Prattsville | 1,341 | Grant County |
| Pyatt Waterworks | AR0000354 | CWS | Pyatt | 488 | Boone County, Marion County |
| Quinn Water Association | AR0000561 | CWS | Eldorado | 729 | Union County |
| Quitman Waterworks | AR0000105 | CWS | Quitman | 1,400 | Cleburne County, Faulkner County, Van Buren County |
| R V A F Texarkana | ARN000189 | NTNCWS | Texarkana | 120 | Miller County |
| Ratcliff Waterworks | AR0000329 | CWS | Ratcliff | 1,019 | Franklin County, Logan County |
| Ravenden Springs Waterworks | AR0000477 | CWS | Ravenden | 139 | Randolph County |
| Ravenden Waterworks | AR0000306 | CWS | Ravenden | 621 | Lawrence County |
| Rector Waterworks | AR0000093 | CWS | Rector | 2,280 | Clay County |
| Redfield Waterworks | AR0000279 | CWS | Redfield | 2,823 | Jefferson County |
| Redhill Water Association | AR0000732 | CWS | Alma | 475 | Crawford County |
| Reed Waterworks | AR0000173 | CWS | Mcghee | 209 | Desha County |
| Reyno Waterworks | AR0000475 | CWS | Reyno | 437 | Randolph County |
| Richwoods Water Association | AR0000835 | CWS | Mountain View | 1,663 | Stone County |
| Rison Waterworks | AR0000106 | CWS | Rison | 1,344 | Cleveland County |
| River Bend Park Poa | AR0000731 | NTNCWS | Hardy | 523 | Sharp County |
| River Chase Water Association | AR0001297 | CWS | Alma | 96 | Crawford County |
| River Valley Water Assn | AR0000833 | CWS | Arkadelphia | 1,207 | Clark County |
| Riviera Utilities | AR0000239 | CWS | Hot Springs | 1,800 | Garland County, Hot Spring County |
| Rock Moore Water Authority | AR0000252 | CWS | Sulphur Rock | 3,462 | Independence County |
| Roe Waterworks | AR0000389 | CWS | Stuttgart | 124 | Monroe County |
| Rosston Water Department | AR0000395 | CWS | Rosston | 750 | Nevada County |
| Russell Waterworks | AR0000591 | CWS | Russell | 461 | White County |
| S P G Water Association | AR0000678 | CWS | St Joe | 1,808 | Marion County, Searcy County |
| Salem Waterworks | AR0000204 | CWS | Salem | 1,639 | Fulton County, Saline County |
| Saline Co Ww Ss Pfb | AR0000491 | CWS | Alexander | 2,538 | Saline County |
| Scranton Waterworks | AR0000330 | CWS | Scranton | 1,542 | Logan County |
| Sdm Water Association | AR0000758 | CWS | Marshall | 520 | Searcy County |
| Se Bradley Co Water Assn | AR0000870 | CWS | Hermitage | 2,713 | Bradley County |
| Sebastian Lake Utility Operating Company | AR0000511 | CWS | Des Peres | 298 | Sebastian County |
| Sedgwick Waterworks | AR0000304 | CWS | Sedgwick | 249 | Craighead County, Lawrence County |
| Selma Water Association | AR0000182 | CWS | Monticello | 1,600 | Drew County |
| Sheridan Waterworks | AR0000215 | CWS | Sheridan | 4,605 | Grant County |
| Shumaker Public Service Co | AR0000407 | CWS | East Camden | 1,399 | Calhoun County, Ouachita County |
| Sidney Water System | AR0000528 | CWS | Sidney | 350 | Sharp County |
| Smackover Waterworks | AR0000555 | CWS | Smackover | 2,821 | Ouachita County, Union County |
| South Logan County Water | AR0000851 | CWS | Boonville | 2,087 | Logan County |
| South Mountain Water Assn | AR0000815 | CWS | Marshall | 948 | Searcy County |
| South Pike Co Water | AR0000978 | CWS | Murfreesboro | 755 | Pike County |
| Southern Hills Water System | AR0000792 | CWS | Rogers | 25 | Carroll County |
| Southwest Arkansas Water System | AR0000889 | CWS | Hope | 2,335 | Hempstead County, Howard County |
| Spadra-Goose Camp Water Assoc | AR0000293 | CWS | Clarksville | 517 | Johnson County |
| Sparkman Waterworks | AR0000166 | CWS | Sparkman | 1,325 | Dallas County |
| St Charles Waterworks | AR0000005 | CWS | St Charles | 326 | Arkansas County |
| St Francis River Reg Water Dd | AR0000836 | CWS | Paragould | 2,465 | Clay County, Craighead County, Greene County |
| St Francis Rural Water Assoc | AR0000537 | CWS | Forrest City | 1,103 | St. Francis County |
| St Francis Water System | AR0000094 | CWS | Piggott | 208 | Clay County |
| Stamps Waterworks | AR0000296 | CWS | Stamps | 1,633 | Lafayette County |
| Star City Waterworks | AR0000318 | CWS | Star City | 2,173 | Lincoln County |
| Starlight Estates | AR0000755 | CWS | Jordan | 67 | Baxter County |
| Stephens Waterworks | AR0000405 | CWS | Stephens | 1,100 | Ouachita County |
| Strawberry Waterworks | AR0000307 | CWS | Strawberry | 1,093 | Lawrence County |
| Strong Waterworks | AR0000556 | CWS | Strong | 1,131 | Union County |
| Subiaco Academy Waterworks | AR0000334 | CWS | Subiaco | 250 | Logan County |
| Subiaco City Waterworks | AR0000135 | CWS | Subiaco | 548 | Logan County |
| Success Waterworks | AR0000095 | CWS | Success | 165 | Clay County |
| Sulphur Springs Waterworks | AR0000057 | CWS | Sulphur Springs | 580 | Benton County |
| Summit Waterworks | AR0000355 | CWS | Summit | 675 | Marion County |
| Sunset Water Association | AR0000472 | CWS | Marion | 690 | Crittenden County |
| Suzano Packaging Inc, Pine Bluff | ARN000032 | NTNCWS | Pine Bluff | 960 | Jefferson County |
| Sw Region Wilderness Camp | ARN000109 | NTNCWS | Bradley | 65 | Lafayette County |
| Sw Warren Water Association | AR0000852 | CWS | Warren | 765 | Bradley County |
| Swifton Waterworks | AR0000265 | CWS | Swifton | 1,013 | Jackson County |
| Sylamore Valley Water Assn | AR0000882 | CWS | Fifty Six | 290 | Izard County, Stone County |
| Sylvan Shores Sd Waterworks | AR0000045 | CWS | Eureka Springs | 65 | Carroll County |
| Table Rock Lake Water Users, Inc. | AR0000824 | CWS | Eureka Springs | 27 | Carroll County |
| Tall Oaks Mhp | AR0000891 | CWS | Mountain Home | 22 | Baxter County |
| Taylor Waterworks | AR0000114 | CWS | Taylor | 566 | Columbia County |
| The Great Passion Play | ARN000088 | NTNCWS | Faietteville | 450 | Carroll County |
| Thornton Waterworks | AR0000072 | CWS | Thornton | 900 | Calhoun County |
| Tillar Waterworks | AR0000186 | CWS | Tillar | 225 | Desha County, Drew County |
| Toad Suck Public Facility Bd | AR0000798 | CWS | Bigelow | 1,340 | Perry County |
| Tollette Water | AR0000618 | CWS | Mineral Springs | 346 | Howard County |
| Tri County Rwdd -Moores Chapel | AR0000846 | CWS | Russellville | 3,112 | Yell County |
| Tulip-Princeton Water Assn | AR0000825 | CWS | Carthage | 1,083 | Dallas County, Grant County, Hot Spring County |
| Tull Water | AR0000220 | CWS | Malvern | 1,987 | Grant County, Saline County |
| Turrell Water Works | AR0000155 | CWS | Proctor | 540 | Crittenden County |
| Tyronza Waterworks | AR0000426 | CWS | Tyronza | 926 | Poinsett County |
| Ulm Waterworks | AR0000451 | CWS | Ulm | 250 | Prairie County |
| United Water Association | AR0000654 | CWS | Brinkley | 473 | Monroe County, Woodruff County |
| Valley Springs Waterworks | AR0000065 | CWS | Valley Springs | 3,400 | Boone County, Marion County |
| Vanndale-Birdeye Water Assoc | AR0000162 | CWS | Cherry Valley | 2,174 | Cross County, Poinsett County |
| Veterans Health Care System Of The Ozark | AR0001221 | NTNCWS | Rogers | 2,254 | Washington County |
| Victoria Water Association | AR0000380 | CWS | Victoria | 33 | Mississippi County |
| Village Water Association | AR0000115 | CWS | Village | 412 | Columbia County |
| Viola Waterworks | AR0000205 | CWS | Viola | 336 | Fulton County |
| Wabbaseka Waterworks | AR0000283 | CWS | Wabbaseka | 286 | Jefferson County |
| Waldo Waterworks | AR0000112 | CWS | Waldo | 1,630 | Columbia County |
| Walker Creek Stateline Rwa | AR0000858 | CWS | Taylor | 1,340 | Lafayette County |
| Walker Water Association | AR0000116 | CWS | Magnolia | 1,182 | Columbia County |
| Walkerville Water Association | AR0000639 | CWS | Emerson | 547 | Columbia County |
| Walnut Hill Water Association | AR0000298 | CWS | Bradley | 275 | Lafayette County |
| Watalula Water Ass0Ciation | AR0000606 | CWS | Ozark | 2,278 | Franklin County, Johnson County |
| Watson Waterworks | AR0000174 | CWS | Watson | 166 | Desha County |
| Weiner Waterworks | AR0000428 | CWS | Weiner | 1,163 | Poinsett County |
| Wesson-Newell Water Assoc | AR0000103 | CWS | El Dorado | 658 | Union County |
| West Ashley County Water Assn | AR0000878 | CWS | Crossett | 683 | Ashley County |
| West Fork Waterworks | AR0000577 | CWS | West Fork | 3,178 | Washington County |
| West Saline Water Users Assn | AR0000682 | CWS | New Edinburgh | 1,825 | Bradley County, Cleveland County |
| West Woodruff Water District | AR0000779 | CWS | Patterson | 402 | Woodruff County |
| Western Grove Municipal Water | AR0000400 | CWS | Western Grove | 930 | Boone County, Newton County, Searcy County |
| Wheatley Waterworks | AR0000535 | CWS | Wheatley | 573 | Monroe County, St. Francis County |
| Whelen Springs Water Dept | AR0000804 | CWS | Gurdon | 559 | Clark County |
| Wickes Waterworks | AR0000440 | CWS | Wickes | 2,014 | Polk County |
| Widener Waterworks | AR0000538 | CWS | Widener | 507 | St. Francis County |
| Wilburn Water Association | AR0000686 | CWS | Heber Springs | 668 | Cleburne County |
| Wildwood Water Association | AR0000562 | CWS | El Dorado | 1,350 | Union County |
| Williford Waterworks | AR0000529 | CWS | Williford | 80 | Sharp County |
| Willisville Waterworks | AR0000650 | CWS | Willisville | 430 | Nevada County |
| Wilmar Waterworks | AR0000187 | CWS | Wilmar | 400 | Drew County |
| Wilmot Waterworks | AR0000021 | CWS | Wilmot | 416 | Ashley County |
| Wilson Gun Shop #2 | AR0001123 | NTNCWS | Berryville | 175 | Carroll County |
| Wilson Water System | AR0000370 | CWS | Wilson | 1,336 | Mississippi County |
| Wilton Waterworks | AR0000321 | CWS | Wilton | 354 | Little River County |
| Winchester Waterworks | AR0000188 | CWS | Winchester | 457 | Desha County, Drew County |
| Winslow Waterworks | AR0000332 | CWS | Winslow | 1,433 | Crawford County, Washington County |
| Winthrop Water Association | AR0000642 | CWS | Foreman | 338 | Little River County |
| Wire Road Water System | AR0000783 | CWS | Camden | 830 | Ouachita County |
| Wkmm Rural Water Association | AR0000700 | CWS | Tillar | 310 | Desha County |
| Wye Mountain Water Association | AR0000410 | CWS | Little Rock | 1,963 | Perry County, Pulaski County |
| Yarbro Waterworks | AR0000383 | CWS | Blytheville | 392 | Mississippi County |
| Yellville Waterworks | AR0000356 | CWS | Yellville | 2,598 | Marion County |