Tap Water Quality Report
Tap water quality in WEST GREENWICH, Rhode Island
Tap water in WEST GREENWICH, Rhode Island receives a grade of F (53/100) from TapWaterSafety.org. It's served by KENT COUNTY WATER AUTHORITY. The most significant water quality concerns are: PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Arsenic detected. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in WEST GREENWICH's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving WEST GREENWICH.
PFAS contamination
Severe concernPerfluorooctane sulfonate (PFOS), Perfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 0.848 ppt, 848x above the EWG health guideline of 0.001 ppt.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 49.9 ppb, 333x above the EWG health guideline of 0.15 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 16.4 ppb, 273x above the EWG health guideline of 0.06 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.25 ppb.
Recommended filters for WEST GREENWICH
Filters matched to the specific contaminants in WEST GREENWICH's water supply.
Reverse Osmosis or NSF P473 certified carbon
$80-$750Activated carbon and RO are the only technologies proven to remove PFAS at certified levels.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in WEST GREENWICH's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.848 ppt | 0.001 | 10.0 | — | — | — | — | 848× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
49.9 ppb | 0.15 | 80.0 | 100 | — | — | — | 333× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
16.4 ppb | 0.06 | — | — | — | — | — | 273× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
17.8 ppb | 0.1 | 60.0 | 60 | — | — | — | 178× over |
| Chloroform Disinfection byproduct |
38.0 ppb | 0.4 | — | — | — | — | — | 95× over |
| Dichloroacetic acid Disinfection byproduct |
14.1 ppb | 0.2 | — | — | — | — | — | 71× over |
| Bromodichloromethane Disinfection byproduct |
4.04 ppb | 0.06 | — | — | — | — | — | 67× over |
| Arsenic Heavy metal |
0.25 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 63× over |
| Perfluorooctanoic acid (PFOA) PFAS |
3.89 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 43× over |
| Trichloroacetic acid Disinfection byproduct |
1.95 ppb | 0.1 | — | — | — | — | — | 20× over |
| Nitrate Inorganic |
1.29 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 9.2× over |
| Nitrate and nitrite Inorganic |
1.23 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 8.8× over |
| Dibromochloromethane Disinfection byproduct |
0.792 ppb | 0.1 | — | — | — | — | — | 7.9× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
1.8 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 6.0× over |
| Cadmium Heavy metal |
0.15 ppb | 0.04 | 5.0 | 5 | 3 | 0.04 | — | 3.8× over |
| Radium, combined (-226 and -228) Radiological |
0.09 pCi/L | 0.05 | 5.0 | — | — | — | — | 1.8× over |
| 6:2 Fluorotelomer Sulfonic Acid (6:2 FTSA) Other |
1.4 ppt | 1.0 | — | — | — | — | — | 1.4× over |
| Dibromoacetic acid Disinfection byproduct |
0.025 ppb | 0.03 | — | — | — | — | — | Below guideline |
| Chromium (hexavalent) Heavy metal |
0.016 ppb | 0.02 | — | — | — | — | — | Below guideline |
| Uranium Radiological |
0.19 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | Below guideline |
| Manganese Heavy metal |
34.5 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.0373 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Perfluoropentane sulfonic acid (PFPeS) PFAS |
0.069 ppt | 1.0 | — | — | — | — | — | Below guideline |
| Beryllium Heavy metal |
0.0625 ppb | 1.0 | 4.0 | — | — | 1 | — | Below guideline |
| Chlorate Disinfection byproduct |
10.5 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
1.73 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
9.88 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Vanadium Other |
0.137 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
4.24 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
4.2 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
0.145 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
2.53 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| MTBE Volatile organic compound |
0.0313 ppb | 13.0 | — | — | — | — | — | Below guideline |
| 1,1-Dichloroethane Volatile organic compound |
0.00627 ppb | 3.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
1.03 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
1.13 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0685 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.475 ppb | — | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.179 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from KENT COUNTY WATER AUTHORITY.