Tap Water Quality Report
Tap water quality in OYSTER BAY (T), New York
Tap water in OYSTER BAY (T), New York receives a grade of D (68/100) from TapWaterSafety.org. It's served by JERICHO WD. The most significant water quality concerns are: PFAS contamination; Nitrate significantly above health guideline; Nitrate and nitrite significantly above health guideline; Chromium (hexavalent) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in OYSTER BAY (T)'s tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving OYSTER BAY (T).
PFAS contamination
Severe concernPerfluorooctanoic acid (PFOA), Perfluorooctane sulfonate (PFOS) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Nitrate significantly above health guideline
Moderate concernNitrate detected at 3.32 ppm, 24x above the EWG health guideline of 0.14 ppm.
Nitrate and nitrite significantly above health guideline
Moderate concernNitrate and nitrite detected at 3.32 ppm, 24x above the EWG health guideline of 0.14 ppm.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 0.432 ppb, 22x above the EWG health guideline of 0.02 ppb.
Recommended filters for OYSTER BAY (T)
Filters matched to the specific contaminants in OYSTER BAY (T)'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.
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 OYSTER BAY (T)'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 |
|---|---|---|---|---|---|---|---|---|
| Nitrate Inorganic |
3.32 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 24× over |
| Nitrate and nitrite Inorganic |
3.32 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 24× over |
| Chromium (hexavalent) Heavy metal |
0.432 ppb | 0.02 | — | — | — | — | — | 22× over |
| 1,2,3-Trichloropropane Other |
0.00747 ppb | 0.0007 | — | — | — | — | — | 11× over |
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.006 ppt | 0.001 | 10.0 | — | — | — | — | 6.0× over |
| Radium, combined (-226 and -228) Radiological |
0.17 pCi/L | 0.05 | 5.0 | — | — | — | — | 3.3× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
0.165 ppb | 0.06 | — | — | — | — | — | 2.8× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.254 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 2.8× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
0.238 ppb | 0.15 | 80.0 | 100 | — | — | — | 1.6× over |
| 1,4-Dioxane Semi-volatile organic compound |
0.292 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Bromodichloromethane Disinfection byproduct |
0.0486 ppb | 0.06 | — | — | — | — | — | Below guideline |
| Dibromochloromethane Disinfection byproduct |
0.0594 ppb | 0.1 | — | — | — | — | — | Below guideline |
| 6:2 Fluorotelomer Sulfonic Acid (6:2 FTSA) Other |
0.396 ppt | 1.0 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
78.1 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Trichloroethylene Volatile organic compound |
0.127 ppb | 0.4 | 5.0 | 10 | 20 | 1.7 | — | Below guideline |
| Chloroform Disinfection byproduct |
0.102 ppb | 0.4 | — | — | — | — | — | Below guideline |
| 1,2-Dichloropropane Volatile organic compound |
0.127 ppb | 0.5 | 5.0 | — | — | — | — | Below guideline |
| Tetrachloroethylene (perchloroethylene) Volatile organic compound |
0.00873 ppb | 0.06 | 5.0 | — | — | — | — | Below guideline |
| 6:2 Fluorotelomer sulfonate (6 2FTS) Other |
0.11 ppt | 1.0 | — | — | — | — | — | Below guideline |
| Bromoform Disinfection byproduct |
0.0297 ppb | 0.5 | — | — | — | — | — | Below guideline |
| 1,1-Dichloroethane Volatile organic compound |
0.124 ppb | 3.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
2.92 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Barium Heavy metal |
8.78 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.003 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | Below guideline |
| Cobalt Other |
0.68 ppb | 70.0 | — | — | — | — | — | Below guideline |
| Perfluoropentane sulfonic acid (PFPeS) PFAS |
0.006 ppt | 1.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
4.13 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
2.43 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
1.56 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Chloromethane Other |
0.00162 ppb | 2.69 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.41 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.0076 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0377 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.005 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| 1,1-Dichloroethylene Volatile organic compound |
0.00356 ppb | — | 7.0 | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.191 ppb | — | — | — | — | — | — | 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 JERICHO WD.