Home hazard report for 11771 — Oyster Bay, NY
ZIP 11771 is served by Oyster Bay WD: no health-based violations since 2016, latest lead result 5.7 ppb, PFAS 3 detected. Nassau County is in EPA radon zone 3.
No health-based violations reported since 2016.
90th-percentile lead in the latest round (Jan 2021). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
PFAS were detected, with PFOA and PFOS below 4.0 ppt (highest not detected).
Predicted average under 2 pCi/L — but any home can have high radon, so EPA still recommends a test.
FEMA’s overall natural-hazard risk for this census tract, relative to the rest of the U.S.
The nearest active Superfund site is 6.1 miles away.
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Where ZIP 11771 is
Dashed: ZIP area · blue: utility service area · scroll or pinch to zoomDrinking water: Oyster Bay WD
Health-based violations
No health-based violations reported since 2016.
Full record for Oyster Bay WD →
Other systems overlapping this ZIP: Jericho WD, Locust Valley WD.
Lead
90th-percentile lead per sampling round (90% of the homes sampled were at or below this level). Black line: EPA’s 15 ppb action level; under the Lead and Copper Rule Improvements the action level becomes 10 ppb from 2027.
PFAS (“forever chemicals”)
| Compound | Highest result | Samples with detection | EPA limit |
|---|---|---|---|
| PFBA | 5.9 ppt | 1 of 4 | — |
| PFPeA | 4.9 ppt | 1 of 4 | — |
| PFHxA | 4.1 ppt | 1 of 4 | — |
| PFDA | not detected | 0 of 4 | — |
| PFOA | not detected | 0 of 4 | 4 ppt MCL |
| PFOS | not detected | 0 of 4 | 4 ppt MCL |
| PFNA | not detected | 0 of 4 | — |
| PFHxS | not detected | 0 of 4 | — |
| PFHpA | not detected | 0 of 4 | — |
| PFBS | not detected | 0 of 4 | — |
| HFPO-DA (GenX) | not detected | 0 of 4 | — |
EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR 5), samples 2023–2025; ppt = parts per trillion (ng/L). The 4.0 ppt maximum contaminant levels for PFOA and PFOS were set by EPA in 2024; water systems have until the end of the decade to comply.
Radon in Nassau County
EPA radon zone 3 — low potential. Predicted average under 2 pCi/L — but any home can have high radon, so EPA still recommends a test.
Radon is a colorless, odorless radioactive gas from soil and rock, and the leading cause of lung cancer among non-smokers. EPA recommends fixing a home at 4 pCi/L or above and considering it from 2 pCi/L. A short-term test kit costs about $15–30. How radon zones work →
Natural hazard risk
FEMA rates the overall natural-hazard risk of this neighborhood (census tract) as Relatively Low, with relatively moderate social vulnerability and very high community resilience.
FEMA National Risk Index (December 2025): expected annual losses from each hazard combined with social vulnerability and community resilience, rated relative to all U.S. census tracts. Hazards not listed are not applicable here. It describes the area, not a single building; flood insurance maps (FEMA FIRMs) decide flood-insurance requirements.
Live conditions: river gauges and flood levels · tornado warnings · wildfire detections · earthquakes — our sister maps, updated from NOAA, USGS and NASA every few minutes.
Superfund sites nearby
| Site | Status | Distance |
|---|---|---|
| Syosset Landfill Oyster Bay, New York · EPA ID NYD000511360 | Cleaned up & deleted | 5.2 mi |
| Li Tungsten Corp. Glen Cove, New York · EPA ID NYD986882660 | Active (final NPL) | 6.1 mi |
| Mattiace Petrochemical Co., Inc. Glen Cove, New York · EPA ID NYD000512459 | Active (final NPL) | 6.2 mi |
| Applied Environmental Services Glenwood Landing, New York · EPA ID NYD980535652 | Active (final NPL) | 7.2 mi |
| Anchor Chemicals Hicksville, New York · EPA ID NYD001485226 | Cleaned up & deleted | 7.5 mi |
| Hooker Chemical & Plastics Corp./Ruco Polymer Corp. Hicksville, New York · EPA ID NYD002920312 | Active (final NPL) | 8.1 mi |
| Port Washington Landfill Port Washington, New York · EPA ID NYD980654206 | Active (final NPL) | 8.3 mi |
| New Cassel/Hicksville Ground Water Contamination New Cassel/Hicksville, New York · EPA ID NY0001095363 | Active (final NPL) | 8.6 mi |
| Old Bethpage Landfill Oyster Bay, New York · EPA ID NYD980531727 | Active (final NPL) | 9.0 mi |
| Claremont Polychemical Old Bethpage, New York · EPA ID NYD002044584 | Active (final NPL) | 9.1 mi |
EPA Superfund National Priorities List (NPL): the country’s most serious known hazardous-waste sites, each with an EPA cleanup record (linked). Distance is measured from the ZIP center to the site’s reference point; being near a site does not by itself mean exposure — EPA site pages describe what was found and how it is being cleaned up.
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions about 11771
Who supplies drinking water to ZIP 11771?
Oyster Bay WD (EPA ID NY2902844), a groundwater (wells) system serving about 8,700 people.
Is there lead in Oyster Bay, NY tap water?
The utility’s latest 90th-percentile lead result (Jan 2021) was 5.7 ppb; EPA’s action level is 15 ppb, falling to 10 ppb from 2027. Lead mostly comes from service lines and home plumbing, so the only way to know your tap is to test it.
Does Oyster Bay, NY water have PFAS?
PFAS were detected, with PFOA and PFOS below 4.0 ppt (highest not detected).
Has the water system in 11771 had violations?
No health-based violations reported since 2016.
What natural hazards affect ZIP 11771?
FEMA’s National Risk Index rates the overall natural-hazard risk here as Relatively Low; the highest-rated hazards are coastal flooding (relatively high), ice storm (relatively moderate), winter weather (relatively moderate).
Are there Superfund sites near 11771?
The nearest active Superfund site is 6.1 miles away. Sites within 10 miles: Syosset Landfill (5.2 mi, Cleaned up & deleted); Li Tungsten Corp. (6.1 mi, Active (final NPL)); Mattiace Petrochemical Co., Inc. (6.2 mi, Active (final NPL)).
Is radon a problem in Nassau County?
Nassau County is in EPA radon zone 3 (low potential). Predicted average under 2 pCi/L — but any home can have high radon, so EPA still recommends a test.