What was found in ZIP 11771
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 3550 µg/L 36% of the EPA limit 10000 µg/L Main supplier: OYSTER BAY WD · 8,700 people · 2019 | 1/1 | SYR4 |
| Nitrate | 3480 µg/L 35% of the EPA limit 10000 µg/L Main supplier: OYSTER BAY WD · 8,700 people · 2019 | 1/1 | SYR4 |
| Fluoride | 110 µg/L 2.8% of the EPA limit 4000 µg/L Main supplier: OYSTER BAY WD · 8,700 people · 2019 | 1/1 | SYR4 |
| Copper | 71.55 µg/L 5.5% of the EPA limit 1300 µg/L Main supplier: OYSTER BAY WD · 8,700 people · 2019 | 1/1 | SYR4 |
| Barium | 9.88 µg/L 0.5% of the EPA limit 2000 µg/L Main supplier: OYSTER BAY WD · 8,700 people · 2019 | 1/1 | SYR4 |
| Tetrachloroethylene | 5.655 µg/L 113% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: OYSTER BAY WD · 8,700 people · 2019 | 1/1 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 5.5 µg/L 92% of the EPA limit 6 µg/L Main supplier: OYSTER BAY WD · 8,700 people · 2018 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 2.5 pCi/L 50% of the EPA limit 5 pCi/L Main supplier: OYSTER BAY WD · 8,700 people · 2019 | 1/1 | SYR4 |
| Trichloroethylene | 1.5 µg/L 30% of the EPA limit 5 µg/L Main supplier: OYSTER BAY WD · 8,700 people · 2019 | 1/1 | SYR4 |
| Gross Beta Particle Activity | 0.9183 pCi/L No EPA limit set Main supplier: OYSTER BAY WD · 8,700 people · 2016 | 1/1 | SYR4 |
| 1,1-Dichloroethylene | 0.5800 µg/L 8.3% of the EPA limit 7 µg/L Main supplier: OYSTER BAY WD · 8,700 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 0.3535 µg/L 1.2% of the EPA limit 30 µg/L Main supplier: OYSTER BAY WD · 8,700 people · 2019 | 1/1 | SYR4 |
| Pfba | 0.0059 µg/L No EPA limit set Main supplier: OYSTER BAY WD · 8,700 people · 2025 | 1/1 | UCMR-5 |
| Lead | 0.0057 mg/L 38% of the EPA limit 0.0150 mg/L Main supplier: OYSTER BAY WD · 8,700 people · 2023 | 1/1 | LCR |
| Pfpea | 0.0049 µg/L No EPA limit set Main supplier: OYSTER BAY WD · 8,700 people · 2025 | 1/1 | UCMR-5 |
| Pfhxa | 0.0041 µg/L No EPA limit set Main supplier: OYSTER BAY WD · 8,700 people · 2025 | 1/1 | UCMR-5 |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
Water suppliers serving ZIP 11771
| Supplier | State | Population served |
|---|---|---|
| OYSTER BAY WD | NY | 8,700 |
Frequently asked questions about ZIP 11771 tap water
Is the tap water in ZIP 11771 safe to drink?
EPA testing detected 16 contaminants across the water suppliers serving ZIP 11771. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 11771?
1 public water supplier report EPA drinking-water monitoring for ZIP 11771. Each is listed above with its population served.
What contaminants are in ZIP 11771's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.