Home hazard report for 11783 — Seaford, NY
ZIP 11783 is served by Liberty Utilities New York - Merrick: 3 violations since 2016, latest lead result 0 ppb, PFAS not detected. Nassau County is in EPA radon zone 3.
Health-based violations since 2016: Lead and Copper Rule. All are listed as resolved.
90th-percentile lead in the latest round (Jul 2025). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
None of the tested PFAS were found above EPA’s reporting limits in 2023–2025.
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 4.0 miles away.
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Where ZIP 11783 is
Dashed: ZIP area · blue: utility service area · scroll or pinch to zoomDrinking water: Liberty Utilities New York - Merrick
Health-based violations
| Contaminant or rule | Health-based violations since 2016 |
|---|---|
| Lead and Copper Rule | 3 |
A health-based violation means a contaminant exceeded its legal limit (MCL) or a required treatment technique was not met, as reported by the state to EPA’s SDWIS. All are listed as resolved or archived; the latest began Jul 2024.
Full record for Liberty Utilities New York - Merrick →
Other systems overlapping this ZIP: South Farmingdale 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 |
|---|---|---|---|
| PFDA | not detected | 0 of 12 | — |
| PFHxA | not detected | 0 of 12 | — |
| PFOA | not detected | 0 of 12 | 4 ppt MCL |
| HFPO-DA (GenX) | not detected | 0 of 12 | — |
| PFBA | not detected | 0 of 12 | — |
| PFHxS | not detected | 0 of 12 | — |
| PFPeA | not detected | 0 of 12 | — |
| PFOS | not detected | 0 of 12 | 4 ppt MCL |
| PFNA | not detected | 0 of 12 | — |
| PFHpA | not detected | 0 of 12 | — |
| PFBS | not detected | 0 of 12 | — |
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 High, with very high 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 |
|---|---|---|
| Liberty Industrial Finishing Farmingdale, New York · EPA ID NYD000337295 | Active (final NPL) | 4.0 mi |
| Preferred Plating Corp. Farmingdale, New York · EPA ID NYD980768774 | Active (final NPL) | 4.3 mi |
| Action Anodizing, Plating, & Polishing Corp. Copiague, New York · EPA ID NYD072366453 | Cleaned up & deleted | 4.4 mi |
| Kenmark Textile Corp. Farmingdale, New York · EPA ID NYD075784165 | Cleaned up & deleted | 5.4 mi |
| Hooker Chemical & Plastics Corp./Ruco Polymer Corp. Hicksville, New York · EPA ID NYD002920312 | Active (final NPL) | 5.6 mi |
| Old Bethpage Landfill Oyster Bay, New York · EPA ID NYD980531727 | Active (final NPL) | 5.9 mi |
| Claremont Polychemical Old Bethpage, New York · EPA ID NYD002044584 | Active (final NPL) | 6.0 mi |
| Circuitron Corp. East Farmingdale, New York · EPA ID NYD981184229 | Active (final NPL) | 6.2 mi |
| New Cassel/Hicksville Ground Water Contamination New Cassel/Hicksville, New York · EPA ID NY0001095363 | Active (final NPL) | 6.3 mi |
| Tronic Plating Co., Inc. Farmingdale, New York · EPA ID NYD002059517 | Cleaned up & deleted | 6.8 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 11783
Who supplies drinking water to ZIP 11783?
Liberty Utilities New York - Merrick (EPA ID NY2902840), a groundwater (wells) system serving about 135,000 people.
Is there lead in Seaford, NY tap water?
The utility’s latest 90th-percentile lead result (Jul 2025) was 0 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 Seaford, NY water have PFAS?
None of the tested PFAS were found above EPA’s reporting limits in 2023–2025.
Has the water system in 11783 had violations?
Health-based violations since 2016: Lead and Copper Rule. All are listed as resolved.
What natural hazards affect ZIP 11783?
FEMA’s National Risk Index rates the overall natural-hazard risk here as Relatively High; the highest-rated hazards are coastal flooding (very high), riverine flooding (relatively high), winter weather (relatively high).
Are there Superfund sites near 11783?
The nearest active Superfund site is 4.0 miles away. Sites within 10 miles: Liberty Industrial Finishing (4.0 mi, Active (final NPL)); Preferred Plating Corp. (4.3 mi, Active (final NPL)); Action Anodizing, Plating, & Polishing Corp. (4.4 mi, Cleaned up & deleted).
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.