Home hazard report for 10931 — Hillburn, NY
ZIP 10931 is served by Mount Fuji: no health-based violations since 2016, latest lead result 2.1 ppb, PFAS not tested. Rockland County is in EPA radon zone 3.
No health-based violations reported since 2016.
90th-percentile lead in the latest round (Jan 2022). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
This system was not part of EPA’s 2023–2025 nationwide PFAS testing (UCMR 5 covers systems serving over 3,300 people and a sample of smaller ones).
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.
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Where ZIP 10931 is
Dashed: ZIP area · blue: utility service area · scroll or pinch to zoomDrinking water: Mount Fuji
Health-based violations
No health-based violations reported since 2016.
Other systems overlapping this ZIP: Bear Mountain Water Supply, Hillburn Village, Torne Brook Farm.
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”)
This system was not part of EPA’s 2023–2025 nationwide PFAS testing (UCMR 5).
Radon in Rockland 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 Very Low, with very low social vulnerability and relatively moderate 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 |
|---|---|---|
| Suffern Village Well Field Village of Suffern, New York · EPA ID NYD980780878 | Cleaned up & deleted | <1 mi |
| Ramapo Landfill Ramapo, New York · EPA ID NYD000511493 | Active (final NPL) | 1.0 mi |
| Ringwood Mines/Landfill Ringwood Borough, New Jersey · EPA ID NJD980529739 | Active (final NPL) | 5.3 mi |
| Warwick Landfill Warwick, New York · EPA ID NYD980506679 | Cleaned up & deleted | 9.3 mi |
| Witco Chemical Corp. (Oakland Plant) Oakland, New Jersey · EPA ID NJD045653854 | Cleaned up & deleted | 9.3 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 10931
Who supplies drinking water to ZIP 10931?
Mount Fuji (EPA ID NY4320531), a groundwater (wells) system serving about 282 people.
Is there lead in Hillburn, NY tap water?
The utility’s latest 90th-percentile lead result (Jan 2022) was 2.1 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 Hillburn, NY water have PFAS?
This system was not part of EPA’s 2023–2025 nationwide PFAS testing (UCMR 5 covers systems serving over 3,300 people and a sample of smaller ones).
Has the water system in 10931 had violations?
No health-based violations reported since 2016.
What natural hazards affect ZIP 10931?
FEMA’s National Risk Index rates the overall natural-hazard risk here as Very Low; the highest-rated hazards are cold wave (relatively low), strong wind (relatively low), winter weather (relatively low).
Are there Superfund sites near 10931?
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code. Sites within 10 miles: Suffern Village Well Field (1.0 mi, Cleaned up & deleted); Ramapo Landfill (1.0 mi, Active (final NPL)); Ringwood Mines/Landfill (5.3 mi, Active (final NPL)).
Is radon a problem in Rockland County?
Rockland 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.