Drinking water / RI
PFAS in Rhode Island drinking water
29 Rhode Island public water systems tested under UCMR5. 15 detected at least one PFAS compound; 14 detected none at the reporting thresholds. Values are the highest single result per compound, in ng/L (parts per trillion). The federal limit for PFOA and PFOS is 4 ng/L.
| Water system | Serves | Highest results (ng/L) | Reading |
|---|---|---|---|
| CUMBERLAND, TOWN OF RI1647530 | Providence | PFPeA 8.3PFOA 7.7 *PFHxA 7.3PFOS 6.7 * | above final limit |
| KENT COUNTY WATER AUTHORITY RI1559511 | Kent | 6:2 FTS 8.4PFPeA 8.3PFOA 7.5 *PFHxA 6.7 | above final limit |
| KINGSTON WATER DISTRICT RI1858421 | Washington | PFBS 36.8PFHxA 11.2PFPeA 9.1PFOA 6.2 * | above final limit |
| NARRAGANSETT WATER DEPT-NORTH END RI1858429 | Washington | PFBS 5.4PFOA 4.3 *PFOS 4PFHxA 3.5 | above final limit |
| NORTH KINGSTOWN TOWN OF RI1559517 | Washington | PFOA 8.1 *PFBS 7.7PFHxA 6.3PFPeA 6.1 | above final limit |
| NORTH TIVERTON FIRE DISTRICT RI1592018 | Newport | PFOA 5.1 *PFPeA 3.2 | above final limit |
| QUONSET BUSINESS PARK RI1592025 | Washington | PFOA 15 *PFPeA 9PFHxA 8.8PFHxS 8.6 | above final limit |
| SOUTH KINGSTOWN-SOUTH SHORE RI1615623 | Washington | PFPeA 12.3PFHxA 8.9PFOA 6.1 *PFHpA 5.5 | above final limit |
| UNIVERSITY OF RHODE ISLAND RI1858422 | Washington | PFOA 16 *PFBS 9PFHxA 8PFPeA 7 | above final limit |
| WESTERLY WATER DEPARTMENT RI1559512 | Washington | PFBA 10PFOA 9 *PFOS 7 *PFPeA 6 | above final limit |
| WOONSOCKET WATER DIVISION RI1559518 | Providence | PFPeA 7.5PFBA 6.7PFOA 5.8 *PFHxA 5 | above final limit |
| JAMESTOWN WATER DEPARTMENT RI1858419 | Newport | PFBA 12 | detected |
| NAVAL STATION, NEWPORT RI1000016 | Newport | PFBA 5PFPeA 4.3PFHxA 3.2 | detected |
| NEWPORT-CITY OF RI1592010 | Newport | PFPeA 6.1PFBA 5.9PFHxA 5.1 | detected |
| PAWTUCKET-CITY OF RI1592021 | Providence | 6:2 FTS 6 | detected |
* exceeds the final federal MCL for that compound. Detections of compounds whose limits EPA proposed to rescind in May 2026 are shown for information.
Systems with no PFAS detected
14 tested systems reported no PFAS above the laboratory reporting limits. Each has its own page with its sampling detail.
- BLOCK ISLAND WATER COMPANY
- BRISTOL COUNTY WATER AUTHORITY
- CNE - NEW LONDON TURNPIKE ENTRY POINT
- EAST PROVIDENCE-CITY OF
- GREENVILLE WATER DISTRICT
- LINCOLN WATER COMMISSION
- NARRAGANSETT WATER SYSTEM-POINT JUDITH
- PONAGANSET HIGH SCHOOL
- PORTSMOUTH WATER & FIRE DISTRICT
- PROVIDENCE-CITY OF
- RHODE ISLAND HOSPITAL - LIFESPAN
- SMITHFIELD WATER SUPPLY BOARD
- SUEZ WATER RI
- WARWICK-CITY OF
A detection at the system level does not tell you what reaches one specific tap: levels vary by entry point, treatment train and plumbing. A certified lab test of your own tap settles it. Testing and treatment options