Home hazard report for 08557 — Sergeantsville, NJ
ZIP 08557 is served by Delaware Township Mua: 2 violations since 2016, latest lead result 0 ppb, PFAS not tested. Hunterdon is in EPA radon zone 1.
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.
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 indoor radon above 4 pCi/L — EPA’s action level. Test your home.
The nearest active Superfund site is 7.9 miles away.
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Where ZIP 08557 is
blue: utility service area · scroll or pinch to zoomDrinking water: Delaware Township Mua
Health-based violations
| Contaminant or rule | Health-based violations since 2016 |
|---|---|
| Lead and Copper Rule | 2 |
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 2020.
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 Hunterdon
EPA radon zone 1 — highest potential. Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.
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 →
Superfund sites nearby
| Site | Status | Distance |
|---|---|---|
| De Rewal Chemical Co. Kingwood Township, New Jersey · EPA ID NJD980761373 | Active (final NPL) | 7.9 mi |
| Krysowaty Farm Hillsborough, New Jersey · EPA ID NJD980529838 | Cleaned up & deleted | 9.4 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 08557
Who supplies drinking water to ZIP 08557?
Delaware Township Mua (EPA ID NJ1007001), a groundwater (wells) system serving about 500 people.
Is there lead in Sergeantsville, NJ tap water?
The utility’s latest 90th-percentile lead result (Jan 2026) 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 Sergeantsville, NJ 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 08557 had violations?
Health-based violations since 2016: Lead and Copper Rule. All are listed as resolved.
Are there Superfund sites near 08557?
The nearest active Superfund site is 7.9 miles away. Sites within 10 miles: De Rewal Chemical Co. (7.9 mi, Active (final NPL)); Krysowaty Farm (9.4 mi, Cleaned up & deleted).
Is radon a problem in Hunterdon?
Hunterdon is in EPA radon zone 1 (highest potential). Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.