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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 systemServesHighest results (ng/L)Reading
CUMBERLAND, TOWN OF

RI1647530

ProvidencePFPeA 8.3PFOA 7.7 *PFHxA 7.3PFOS 6.7 *above final limit
KENT COUNTY WATER AUTHORITY

RI1559511

Kent6:2 FTS 8.4PFPeA 8.3PFOA 7.5 *PFHxA 6.7above final limit
KINGSTON WATER DISTRICT

RI1858421

WashingtonPFBS 36.8PFHxA 11.2PFPeA 9.1PFOA 6.2 *above final limit
NARRAGANSETT WATER DEPT-NORTH END

RI1858429

WashingtonPFBS 5.4PFOA 4.3 *PFOS 4PFHxA 3.5above final limit
NORTH KINGSTOWN TOWN OF

RI1559517

WashingtonPFOA 8.1 *PFBS 7.7PFHxA 6.3PFPeA 6.1above final limit
NORTH TIVERTON FIRE DISTRICT

RI1592018

NewportPFOA 5.1 *PFPeA 3.2above final limit
QUONSET BUSINESS PARK

RI1592025

WashingtonPFOA 15 *PFPeA 9PFHxA 8.8PFHxS 8.6above final limit
SOUTH KINGSTOWN-SOUTH SHORE

RI1615623

WashingtonPFPeA 12.3PFHxA 8.9PFOA 6.1 *PFHpA 5.5above final limit
UNIVERSITY OF RHODE ISLAND

RI1858422

WashingtonPFOA 16 *PFBS 9PFHxA 8PFPeA 7above final limit
WESTERLY WATER DEPARTMENT

RI1559512

WashingtonPFBA 10PFOA 9 *PFOS 7 *PFPeA 6above final limit
WOONSOCKET WATER DIVISION

RI1559518

ProvidencePFPeA 7.5PFBA 6.7PFOA 5.8 *PFHxA 5above final limit
JAMESTOWN WATER DEPARTMENT

RI1858419

NewportPFBA 12detected
NAVAL STATION, NEWPORT

RI1000016

NewportPFBA 5PFPeA 4.3PFHxA 3.2detected
NEWPORT-CITY OF

RI1592010

NewportPFPeA 6.1PFBA 5.9PFHxA 5.1detected
PAWTUCKET-CITY OF

RI1592021

Providence6:2 FTS 6detected

* 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.

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