Radon in Warren County, New Jersey
Warren County, New Jersey, is in EPA radon Zone 1: predicted average indoor radon screening level greater than 4 pCi/L (highest potential). No laboratory test results are on file for this county (no tests reported, or too few to publish).
Radon test results in Warren County
| Test results | Period | Tests | Typical result | 4 pCi/L or more |
|---|---|---|---|---|
| New Jersey radon program | 2022 | 1,630 | median 1.5 pCi/L | 24.6% |
Test results describe buildings whose owners chose to test and whose results reached the lab or agency, not a random sample; small counts swing widely. State and US shares are computed from county counts and percents. The laboratory data comes from national radon testing laboratories and supplements EPA's zone map.
Radon in nearby counties
| County | EPA zone | Lab tests | 4 pCi/L or more |
|---|---|---|---|
| Northampton County, PA | Zone 1 | 5,798 | 50.4% |
| Hunterdon County, NJ | Zone 1 | n/a | n/a |
| Monroe County, PA | Zone 1 | 870 | 44.6% |
| Morris County, NJ | Zone 1 | n/a | n/a |
| Sussex County, NJ | Zone 1 | n/a | n/a |
| Somerset County, NJ | Zone 1 | n/a | n/a |
The six counties with the nearest centers.
What to do about radon in Warren County
Test the building. EPA recommends fixing a home at 4 pCi/L or more and considering a fix between 2 and 4 pCi/L, and says there is no known safe level of exposure. New Jersey's state radon program can point you to testers and test kits.
Buying here? The Environmental Records Report lists this county's radon zone and test results with the flood zone, mapped faults, power lines and federal contamination records near the address.
Radon in Warren County: questions
What is the radon level in Warren County?
No laboratory results are on file for Warren County. The county's EPA zone is Zone 1. Only a test of the building gives its level.
Is Warren County in radon Zone 1?
Yes. EPA's 1993 Map of Radon Zones puts Warren County in Zone 1, the counties with a predicted average indoor radon screening level above 4 pCi/L.
Should I test for radon in Warren County?
Yes. EPA recommends testing every home whatever its zone: "This map should not be used to determine if individual homes need to be tested." Fix the home at 4 pCi/L or more and consider a fix between 2 and 4 pCi/L; EPA says there is no known safe level of radon exposure.
More for Warren County
- Warren loan limitsThis year's FHFA conforming, FHA and VA county loan limits for 1 to 4 unit homes, from FHFA's and HUD's official files.
- Warren fair market rentHUD Fair Market Rents for studios to 4 bedrooms, the voucher payment standard range and the change from last year.
- Warren property tax rateEffective property tax rate from Census survey data: median taxes paid against median home value, ranked in the state.
- Environmental records reportSuperfund, hazardous waste, leaking tank and brownfield sites near any Warren address, with distances and a site map. A records search, not a Phase I.
- Superfund sites in New JerseyEvery EPA Superfund site in New Jersey with its status, county and a map, refreshed nightly from federal records.
- USDA eligibility map: New JerseyHow much of each New Jersey county is in a USDA-eligible rural area, the towns mapped ineligible, and a free address check.
- Opportunity zones in New JerseyEvery designated Opportunity Zone tract in New Jersey by county, from the IRS list, and the tracts eligible for the 2027 round.
- Census tract lookupThe census tract of any Warren address with its FFIEC income level and HUD Qualified Census Tract and DDA status.
Other free hazard lookups
- Fault lines near an addressUSGS-mapped earthquake faults within 5 miles, their age and slip rate, and the USGS seismic hazard value.
- Power lines near an addressHigh-voltage transmission lines within 1 mile from federal maps, with voltage and distance.
- Flood zone lookupThe FEMA flood zone mapped at any US address. Not an official flood zone determination.
- Superfund sites near an addressThe nearest EPA Superfund (NPL) sites and their status.
All of these, plus wetlands, FEMA hazard ratings and the federal contamination lists, are in the Environmental Records Report for any US address ($29).
Radon in every New Jersey county · Radon map of every state
Data compiled 2026-10-20. County FIPS 34041. County-level screening information, not a radon measurement of any building.