169 community and non-transient non-community water systems are listed for Rhode Island in EPA SDWIS. 29 were sampled under UCMR 5; 15 of those had at least one PFAS result at or above the reporting level, and 11 had a highest single result at or above a 2024 EPA limit (PFOA or PFOS 4 ppt, or Hazard Index 1).
Rhode Island 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 (29)
| System | PWSID | City | Population | Highest PFOA (ppt) | Highest PFOS (ppt) | Highest HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Block Island Water Company | RI1858430 | Block Island | 9,999 | <MRL | <MRL | 0 | No PFAS detected |
| Bristol County Water Authority | RI1647515 | Warren | 49,000 | <MRL | <MRL | 0 | No PFAS detected |
| Brown University Health-Ri Hospital | RI2980469 | Newton | 8,040 | <MRL | <MRL | 0 | No PFAS detected |
| Cne - New London Turnpike Entry Point | RI2980453 | Warwick | 9,999 | <MRL | <MRL | 0 | No PFAS detected |
| Cumberland, Town Of | RI1647530 | Cumberland | 21,235 | 7.7 | 6.7 | 0.002 | PFOA 1–3 × its limit |
| East Providence-City Of | RI1615610 | East Providence | 47,961 | <MRL | <MRL | 0 | No PFAS detected |
| Greenville Water District | RI1858410 | Greenville | 9,500 | <MRL | <MRL | 0 | No PFAS detected |
| Jamestown Water Department | RI1858419 | Jamestown | 3,348 | <MRL | <MRL | 0 | Other PFAS detected |
| Kent County Water Authority | RI1559511 | West Greenwich | 94,107 | 7.5 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Kingston Water District | RI1858421 | West Kingston | 3,968 | 6.2 | <MRL | 0.018 | PFOA 1–3 × its limit |
| Lincoln Water Commission | RI1858423 | Lincoln | 21,664 | <MRL | <MRL | 0 | No PFAS detected |
| Narragansett Water Dept-North End | RI1858429 | Narragansett | 4,432 | 4.3 | 4 | 0.003 | PFOA 1–3 × its limit |
| Narragansett Water System-Point Judith | RI1858428 | Narragansett | 8,210 | <MRL | <MRL | 0 | No PFAS detected |
| Naval Station, Newport | RI1000016 | Newport | 7,870 | <MRL | <MRL | 0 | Other PFAS detected |
| Newport-City Of | RI1592010 | Newport | 42,155 | <MRL | <MRL | 0 | Other PFAS detected |
| North Kingstown Town Of | RI1559517 | North Kingstown | 27,732 | 8.1 | 4.6 | 0.322 | PFOA 1–3 × its limit |
| North Tiverton Fire District | RI1592018 | Tiverton | 8,969 | 5.1 | <MRL | 0 | PFOA 1–3 × its limit |
| Pawtucket Water Supply Board Veolia-Na | RI1592021 | Pawtucket | 98,130 | <MRL | <MRL | 0 | Other PFAS detected |
| Ponaganset High School | RI1583829 | North Scituate | 1,600 | <MRL | <MRL | 0 | No PFAS detected |
| Portsmouth Water & Fire District | RI1592022 | Portsmouth | 17,090 | <MRL | <MRL | 0 | No PFAS detected |
| Providence-City Of | RI1592024 | Providence | 333,142 | <MRL | <MRL | 0 | No PFAS detected |
| Quonset Business Park | RI1592025 | North Kingstown | 13,000 | 15 | 5 | 0.86 | PFOA ≥ 3 × its limit |
| Smithfield Water Supply Board | RI1615616 | Smithfield | 9,460 | <MRL | <MRL | 0 | No PFAS detected |
| South Kingstown-South Shore | RI1615623 | Wakefield | 6,170 | 6.1 | <MRL | 0 | PFOA 1–3 × its limit |
| University Of Rhode Island | RI1858422 | Kingston | 19,354 | 16 | 5 | 1.103 | PFOA ≥ 3 × its limit |
| Veolia Water Wakefield Rhode Island Inc | RI1615624 | Wakefield | 21,225 | <MRL | <MRL | 0 | No PFAS detected |
| Warwick-City Of | RI1615627 | Warwick | 73,289 | <MRL | <MRL | 0 | No PFAS detected |
| Westerly Water Department | RI1559512 | Westerly | 35,298 | 9 | 7 | 0.002 | PFOA 1–3 × its limit |
| Woonsocket Water Division | RI1559518 | Woonsocket | 45,828 | 5.8 | <MRL | 0 | PFOA 1–3 × its limit |
Not tested under UCMR 5 (140)
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 |
|---|---|---|---|---|---|
| Abbey Lane Community Assn., Inc. | RI1000009 | CWS | Foster | 45 | Providence County |
| Acorn Academy, Llc | RI2980271 | NTNCWS | Chepachet | 82 | Providence County |
| Adcare Rhode Island Inc | RI2980002 | NTNCWS | North Kingstown | 70 | Washington County |
| Alpine Nursing Home | RI2519426 | CWS | Coventry | 105 | Kent County |
| Ashaway Elementary School | RI1858417 | NTNCWS | Wood River Junction | 300 | Washington County |
| Ashaway Line & Twine Mfg. Co.-Lower Mill | RI1858415 | NTNCWS | Ashaway | 50 | Washington County |
| Beadery Industrial, The | RI1858414 | NTNCWS | Hope Valley | 50 | Washington County |
| Beadery Warehouse, The | RI1900035 | NTNCWS | Hope Valley | 30 | Washington County |
| Benoit Realty Llc Dba Anchor Subaru | RI2980466 | NTNCWS | North Smithfield | 125 | Providence County |
| Bethany Home Of Rhode Island | RI2980490 | CWS | Providence | 83 | Providence County |
| Bethel Village Water Assn | RI1000045 | CWS | Ashaway | 180 | Washington County |
| Blueberry Heights Housing Cooperative Co | RI2814410 | CWS | Warwick | 44 | Kent County |
| Border Hill Mobile Home Park | RI2674924 | CWS | Charlestown | 75 | Washington County |
| Briarwood Child Academy Smithfield | RI2980354 | NTNCWS | North Smithfield | 111 | Providence County |
| Brown University Health-Miriam Hospital | RI2980468 | NTNCWS | Newton | 2,401 | Providence County |
| Brown University Health-Newport Hospital | RI2980471 | NTNCWS | Newton | 981 | Newport County |
| Bruin Plastics Company, Inc. | RI2980311 | NTNCWS | Glendale | 50 | Providence County |
| Burrillville Middle School | RI1900028 | NTNCWS | Burrillville | 650 | Providence County |
| Canonchet Cliffs Water Association Inc. | RI1900053 | CWS | Hope Valley | 154 | Washington County |
| Captain Isaac Paine School | RI1583823 | NTNCWS | Foster | 460 | Providence County |
| Carousel Industries Of North America Llc | RI2980192 | NTNCWS | Exeter | 200 | Washington County |
| Carpenter Hall Llc Dba Zinnia Exeter | RI2980264 | NTNCWS | Exeter | 74 | Washington County |
| Castle Rock Condominiums | RI1000035 | CWS | Warwick | 292 | Washington County |
| Central Beach Fire District | RI1647512 | CWS | Charlestown | 470 | Washington County |
| Chariho Regional High School | RI1592030 | NTNCWS | Wood River Junction | 1,300 | Washington County |
| Chariho Regional Middle School | RI2980185 | NTNCWS | Wood River Junction | 1,500 | Washington County |
| Charlestown Cedars Llc | RI2674925 | CWS | Wakefield | 150 | Washington County |
| Charlestown Elementary School | RI1647525 | NTNCWS | Wood River Junction | 350 | Washington County |
| Charlestown Municipal Offices | RI1900027 | NTNCWS | Charlestown | 30 | Washington County |
| Charlestown Police Station | RI2980421 | NTNCWS | Charlestown | 28 | Washington County |
| Charlestown Senior Community Center | RI2980019 | NTNCWS | Charlestown | 40 | Washington County |
| Chepachet Professional Building | RI2980296 | NTNCWS | Greenville | 66 | Providence County |
| Chimera Inc | RI2519424 | CWS | Narragansett | 133 | Providence County |
| Chopmist Hill Community Center | RI2000111 | NTNCWS | North Scituate | 50 | Providence County |
| Church Woods | RI2980017 | CWS | Charlestown | 98 | Washington County |
| Clayville Elementary School | RI1615611 | NTNCWS | Clayville | 140 | Providence County |
| Clear River Electric And Water District | RI1858411 | CWS | Pascoag | 6,000 | Providence County |
| Cne - Hopkins Hill Road Entry Point | RI2980452 | CWS | Warwick | 317 | Kent County, Providence County |
| Cooper Hill Office Complex | RI2980134 | NTNCWS | Greenville | 75 | Providence County |
| Coventry National Guard | RI1900003 | NTNCWS | East Greenwich | 50 | Kent County |
| Crandall House-Sr. Citizens | RI2000145 | NTNCWS | Hopkinton | 30 | Washington County |
| Daedalus Office Park | RI2980474 | NTNCWS | North Kingstown | 120 | Washington County |
| Dawn Hill Home Rehab And Healthcare, The | RI2980478 | CWS | Bristol | 220 | Bristol County |
| Dean Warehouse Services | RI1559516 | NTNCWS | Blackstone | 25 | Washington County |
| Dowling Village | RI2980476 | CWS | Warwick | 2,720 | Providence County |
| Early Learning Centers Of Risaunderstown | RI2980346 | NTNCWS | Saunderstown | 40 | Washington County |
| Echo Lake Water District | RI2980414 | CWS | Chepachet | 160 | Providence County |
| Eleanor Slater Hospital Zambarano Unit | RI1647516 | CWS | Providence | 270 | Providence County |
| Exeter Job Corps Center | RI2980475 | CWS | Exeter | 300 | Washington County |
| Exeter-W.Greenwich Jr/Sr High School | RI1900024 | NTNCWS | West Greenwich | 906 | Kent County |
| Fm Global Research Campus | RI2980393 | NTNCWS | West Glocester | 110 | Providence County |
| Fogarty Memorial School | RI1000007 | NTNCWS | Chepachet | 427 | Providence County |
| Foster Senior Housing Inc. | RI1858435 | CWS | Foster | 31 | Providence County |
| Foster Town Hall | RI2980322 | NTNCWS | Foster | 90 | Providence County |
| Four Seasons Mhp Co-Op Assn. | RI2980001 | CWS | Tiverton | 40 | Newport County |
| Glendale Water Assn | RI1583825 | CWS | Glendale | 75 | Providence County |
| Glocester Senior Center, Memorial Park | RI2980316 | NTNCWS | Chepachet | 100 | Providence County |
| Glocester Town Hall-School Administratio | RI1583827 | NTNCWS | Chepachet | 170 | Providence County |
| Greene School - Building 1, The | RI2980050 | NTNCWS | West Greenwich | 250 | Kent County |
| Greene School - Building 2 & 3, The | RI2980310 | NTNCWS | West Greenwich | 65 | Kent County |
| Greenwich Village Nursery School, Inc. | RI2000135 | NTNCWS | Coventry | 35 | Kent County |
| Harmony Hill School, Inc. | RI2000059 | CWS | Chepachet | 199 | Providence County |
| Heritage Park Home Co-Operative | RI2051311 | CWS | Middletown | 60 | Newport County |
| Hillsdale Housing Cooperative, Inc. | RI2942525 | CWS | Warwick | 170 | Washington County |
| Hopkinton Industrial Park, Llc | RI2980430 | NTNCWS | Ashaway | 125 | Washington County |
| Hopkinton, Town Of | RI2980473 | CWS | Hopkinton | 125 | Washington County |
| Jemp 1 Llc | RI2980323 | CWS | Canton | 38 | Providence County |
| Kingston Hill Academy | RI2980411 | NTNCWS | Saunderstown | 285 | Washington County |
| Ladd Center Water System | RI1592012 | CWS | North Kingstown | 129 | Kent County, Washington County |
| Lake Forest Health And Rehabilitation | RI2000083 | CWS | Smithfield | 268 | Providence County |
| Lakeview Charlestown Early Lrning Ctr. | RI2980197 | NTNCWS | Fairfield | 42 | Washington County |
| Laurel Crest Glocester Housing Authority | RI2980146 | CWS | Chepachet | 44 | Providence County |
| Lawrence Sunset Cove Association | RI2980003 | CWS | Tiverton | 36 | Newport County |
| Liberty Hill | RI2980481 | CWS | Exeter | 48 | Washington County |
| Lindhbrook Water Company | RI1000098 | CWS | Harwinton | 200 | Washington County |
| Maplehill Mobile Home Park | RI2973130 | CWS | Slatersville | 750 | Providence County |
| Meadowbrook Waldorf School | RI2980422 | NTNCWS | West Kingston | 150 | Washington County |
| Meadowlark, Inc. | RI2753326 | CWS | Providence | 183 | Newport County |
| Metcalf Elementary School | RI1583819 | NTNCWS | West Greenwich | 687 | Washington County |
| Mildred E Lineham School | RI1559510 | NTNCWS | West Greenwich | 90 | Kent County |
| Mobile Village, Inc. | RI2585313 | CWS | Coventry | 130 | Kent County, Washington County |
| Nach Realty Trust | RI2980341 | NTNCWS | Billerica | 115 | Providence County |
| Narragansett Four Winds Community Center | 010502003 | NTNCWS | Charlestown | 50 | |
| Narragansett Indian Admin Building | 010502002 | NTNCWS | Charlestown | 25 | |
| Nasonville Water District | RI1900034 | CWS | Glendale | 150 | Providence County |
| New Era Enrichment Academy | RI2980135 | NTNCWS | Johnston | 70 | Providence County |
| Ninigret Realty | RI2674928 | CWS | Stamford | 109 | Washington County |
| North Scituate Elementary | RI1615613 | NTNCWS | Scituate | 500 | Providence County |
| North Smithfield Air National Guard Syst | RI1900004 | NTNCWS | North Kingstown | 25 | Providence County |
| North Smithfield Elementary School | RI1900026 | NTNCWS | North Smithfield | 460 | Providence County |
| North Smithfield Jr_Sr High School | RI1592017 | NTNCWS | North Smithfield | 1,200 | Providence County |
| Oak Harbor Village, Llc. | RI2000160 | NTNCWS | Canterbury | 290 | Washington County |
| Ocean State Power Llc | RI1900040 | NTNCWS | Harrisville | 28 | Providence County |
| Ocean State Transit-Chariho | RI2980384 | NTNCWS | Wood River Junction | 25 | Washington County |
| Paige Associates | RI1900020 | CWS | Coventry | 120 | Kent County |
| Pine Acres Alr | RI2000004 | CWS | Coventry | 75 | Kent County |
| Pinewood Park School | RI1900038 | NTNCWS | Chepachet | 125 | Providence County |
| Ponaganset Middle School | RI2980425 | NTNCWS | North Scituate | 923 | Providence County |
| Providence-City Of - Whipple | RI2980461 | CWS | Providence | 471 | Providence County |
| Prudence Island Water District | RI1592023 | CWS | Hudson | 1,500 | Newport County |
| Quonochontaug East Beach Water Associati | RI1647511 | CWS | Charlestown | 300 | Washington County |
| R.I. State Police Headquarters -New | RI2980330 | NTNCWS | North Scituate | 145 | Providence County |
| Richmond Ridge Development | RI2980480 | CWS | Providence | 172 | Washington County |
| Richmond, Town Of | RI1000040 | CWS | Richmond | 2,671 | Washington County |
| Rochs Fresh Foods Facility | RI2980450 | NTNCWS | West Greenwich | 50 | Kent County |
| Rockville Mill Hopkinton, Llc | RI2980447 | CWS | Rockville | 28 | Washington County |
| Sakonnet Early Learning Center, Inc. | RI2980138 | NTNCWS | Tiverton | 200 | Newport County |
| Saugatucket Springs | RI2980423 | CWS | Providence | 110 | Washington County |
| Scituate Early Learning Center | RI1900044 | NTNCWS | North Scituate | 86 | Providence County |
| Scituate High School & Middle School | RI1615612 | CWS | Scituate | 1,426 | Providence County |
| Scituate Village Plaza | RI2980030 | NTNCWS | Saunderstown | 450 | Providence County |
| Shadow Woods At Deer Brook | RI2980426 | CWS | Warwick | 300 | Washington County |
| Shady Harbor Fire District | RI1559513 | CWS | Westwood | 300 | Washington County |
| Shannock Water District | RI1647529 | CWS | Shannock | 269 | Washington County |
| Silveira Kindergarten & Nursery School, | RI2980140 | NTNCWS | Middletown | 66 | Newport County |
| Ski Pro, Inc. | RI2051729 | NTNCWS | Slocum | 100 | Washington County |
| Slatersville Public Supply | RI1615614 | CWS | North Smithfield | 3,403 | Providence County |
| South Kingstown Nursing And Rehab | RI2882117 | CWS | West Kingston | 232 | Washington County |
| South Kingstown-Middlebridge | RI1000015 | CWS | Wakefield | 694 | Washington County |
| South Trail Commerce | RI2980487 | CWS | Saunderstown | 175 | Washington County |
| Split Rock Corporation | RI2585312 | CWS | North Kingstown | 138 | Washington County |
| St. Andrew Lutheran Church | RI2980229 | NTNCWS | Charlestown | 85 | Washington County |
| Stone Bridge Fire District | RI1615619 | CWS | Tiverton | 2,793 | Newport County |
| Sunrise Associates, Llc | RI2415415 | NTNCWS | North Scituate | 25 | Providence County |
| Tiverton Four Corners | RI2980458 | NTNCWS | Adamsville | 297 | Newport County |
| Tiverton Water Authority, Town Hall | RI1900042 | CWS | Tiverton | 3,213 | Newport County |
| Touisset Point Water Trust | RI1615626 | CWS | Warren | 225 | Bristol County |
| Trinity Lutheran Pre-School | RI2980127 | NTNCWS | Ashaway | 45 | Washington County |
| United States Navy -Fort Adams | RI1900046 | CWS | Newport | 320 | Newport County |
| Village On Chopmist Hill, The | RI2943224 | CWS | Rye | 250 | Providence County |
| Warwick-Potowomut | RI1900051 | CWS | Warwick | 2,163 | Kent County |
| Washington Oak Elementary School | RI1900055 | NTNCWS | Coventry | 660 | Kent County |
| Wawaloam School | RI1583820 | NTNCWS | West Greenwich | 290 | Washington County |
| West Glocester Elementary School | RI1900041 | NTNCWS | Chepachet | 541 | Providence County |
| West Greenwich Town Hall | RI1900056 | NTNCWS | West Greenwich | 40 | Kent County |
| West Greenwich Travel Center | RI2980015 | NTNCWS | Westlake | 255 | Kent County |
| Western Coventry Elem School | RI1647527 | NTNCWS | Coventry | 496 | Kent County |
| Wilbur And Mcmahon School | RI1858425 | NTNCWS | Little Compton | 458 | Newport County |
| Wood River Health Services | RI2000133 | NTNCWS | Hope Valley | 150 | Washington County |
| Wrights Farm Corp. | RI2973119 | NTNCWS | Harrisville | 1,125 | Providence County |