Home hazard report for 11581 — Valley Stream, NY
ZIP 11581 is served by Liberty Utilities New York - Lynbrook: 5 violations since 2016, latest lead result 5 ppb, PFAS 5.1 ppt. 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 (Jan 2026). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
Highest PFOA or PFOS result in EPA’s 2023–2025 testing was at or above 4.0 ppt, EPA’s 2024 maximum contaminant level for each. 3 PFAS compounds 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.
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code.
Active weather alerts
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Where ZIP 11581 is
Dashed: ZIP area · blue: utility service area · scroll or pinch to zoomDrinking water: Liberty Utilities New York - Lynbrook
Health-based violations
| Contaminant or rule | Health-based violations since 2016 |
|---|---|
| Lead and Copper Rule | 5 |
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 2025.
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 |
|---|---|---|---|
| PFHxS | 6.3 ppt | 2 of 35 | — |
| PFOS | 5.1 ppt | 1 of 35 | 4 ppt MCL |
| PFNA | 4.1 ppt | 1 of 35 | — |
| PFHpA | not detected | 0 of 35 | — |
| PFPeA | not detected | 0 of 35 | — |
| PFHxA | not detected | 0 of 35 | — |
| PFDA | not detected | 0 of 35 | — |
| PFOA | not detected | 0 of 35 | 4 ppt MCL |
| PFBS | not detected | 0 of 35 | — |
| HFPO-DA (GenX) | not detected | 0 of 35 | — |
| PFBA | not detected | 0 of 35 | — |
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 very low 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 |
|---|---|---|
| Peninsula Boulevard Ground Water Plume Hewlett, New York · EPA ID NYN000204407 | Active (final NPL) | <1 mi |
| Genzale Plating Co. Franklin Square, New York · EPA ID NYD002050110 | Active (final NPL) | 4.9 mi |
| Fulton Avenue North Hempstead, New York · EPA ID NY0000110247 | Active (final NPL) | 6.7 mi |
| Jackson Steel Mineola, North Hempstead, New York · EPA ID NYD001344456 | Cleaned up & deleted | 6.9 mi |
| Old Roosevelt Field Contaminated Ground Water Area Garden City, New York · EPA ID NYSFN0204234 | Active (final NPL) | 7.6 mi |
| Pasley Solvents & Chemicals, Inc. Hempstead, New York · EPA ID NYD991292004 | Cleaned up & deleted | 7.6 mi |
| Stanton Cleaners Area Ground Water Contamination Great Neck, New York · EPA ID NYD047650197 | 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 11581
Who supplies drinking water to ZIP 11581?
Liberty Utilities New York - Lynbrook (EPA ID NY2902835), a groundwater (wells) system serving about 220,000 people.
Is there lead in Valley Stream, NY tap water?
The utility’s latest 90th-percentile lead result (Jan 2026) was 5 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 Valley Stream, NY water have PFAS?
Highest PFOA or PFOS result in EPA’s 2023–2025 testing was at or above 4.0 ppt, EPA’s 2024 maximum contaminant level for each. 3 PFAS compounds detected.
Has the water system in 11581 had violations?
Health-based violations since 2016: Lead and Copper Rule. All are listed as resolved.
What natural hazards affect ZIP 11581?
FEMA’s National Risk Index rates the overall natural-hazard risk here as Relatively Low; the highest-rated hazards are coastal flooding (relatively high), winter weather (relatively moderate), cold wave (relatively low).
Are there Superfund sites near 11581?
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code. Sites within 10 miles: Peninsula Boulevard Ground Water Plume (0.7 mi, Active (final NPL)); Genzale Plating Co. (4.9 mi, Active (final NPL)); Fulton Avenue (6.7 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.