Home hazard report for 07733 — Holmdel, NJ
ZIP 07733 is served by Nj American Water - Coastal North: 1 violation since 2016, latest lead result 2 ppb, PFAS 7.5 ppt. Monmouth County is in EPA radon zone 1.
Health-based violations since 2016: Interim Enhanced Surface Water Treatment 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. 4 PFAS compounds detected.
Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.
FEMA’s overall natural-hazard risk for this census tract, relative to the rest of the U.S.
The nearest active Superfund site is 3.8 miles away.
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Where ZIP 07733 is
Dashed: ZIP area · blue: utility service area · scroll or pinch to zoomDrinking water: Nj American Water - Coastal North
Health-based violations
| Contaminant or rule | Health-based violations since 2016 |
|---|---|
| Interim Enhanced Surface Water Treatment Rule | 1 |
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 Sep 2019.
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 |
|---|---|---|---|
| PFBS | 9.2 ppt | 2 of 38 | — |
| PFOA | 7.5 ppt | 18 of 38 | 4 ppt MCL |
| PFPeA | 4.8 ppt | 10 of 38 | — |
| PFHxA | 4.6 ppt | 12 of 38 | — |
| PFBA | not detected | 0 of 38 | — |
| PFDA | not detected | 0 of 38 | — |
| PFOS | not detected | 0 of 38 | 4 ppt MCL |
| PFNA | not detected | 0 of 38 | — |
| PFHxS | not detected | 0 of 38 | — |
| PFHpA | not detected | 0 of 38 | — |
| HFPO-DA (GenX) | not detected | 0 of 38 | — |
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 Monmouth County
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 →
Natural hazard risk
FEMA rates the overall natural-hazard risk of this neighborhood (census tract) as Relatively Moderate, 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 |
|---|---|---|
| Imperial Oil Co., Inc./Champion Chemicals Morganville, New Jersey · EPA ID NJD980654099 | Active (final NPL) | 3.8 mi |
| Burnt Fly Bog Marlboro Township, New Jersey · EPA ID NJD980504997 | Active (final NPL) | 5.5 mi |
| Raritan Bay Slag Old Bridge Township, Sayreville, New Jersey · EPA ID NJN000206276 | Active (final NPL) | 7.6 mi |
| Naval Weapons Station Earle (Site A) Colts Neck, New Jersey · EPA ID NJ0170022172 | Active (final NPL) | 7.6 mi |
| Global Sanitary Landfill Old Bridge Township, New Jersey · EPA ID NJD063160667 | Active (final NPL) | 7.7 mi |
| Evor Phillips Leasing Old Bridge Township, New Jersey · EPA ID NJD980654222 | Active (final NPL) | 9.1 mi |
| CPS/Madison Industries Old Bridge Township, New Jersey · EPA ID NJD002141190 | 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 07733
Who supplies drinking water to ZIP 07733?
Nj American Water - Coastal North (EPA ID NJ1345001), a surface water (rivers, lakes) system serving about 377,613 people.
Is there lead in Holmdel, NJ tap water?
The utility’s latest 90th-percentile lead result (Jan 2026) was 2 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 Holmdel, NJ 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. 4 PFAS compounds detected.
Has the water system in 07733 had violations?
Health-based violations since 2016: Interim Enhanced Surface Water Treatment Rule. All are listed as resolved.
What natural hazards affect ZIP 07733?
FEMA’s National Risk Index rates the overall natural-hazard risk here as Relatively Moderate; the highest-rated hazards are strong wind (very high), heat wave (relatively high), lightning (relatively high).
Are there Superfund sites near 07733?
The nearest active Superfund site is 3.8 miles away. Sites within 10 miles: Imperial Oil Co., Inc./Champion Chemicals (3.8 mi, Active (final NPL)); Burnt Fly Bog (5.5 mi, Active (final NPL)); Raritan Bay Slag (7.6 mi, Active (final NPL)).
Is radon a problem in Monmouth County?
Monmouth County is in EPA radon zone 1 (highest potential). Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.