Type your town below to see its official NJDEP radon-potential tier and published test statistics — how many homes have been tested there and what share measured at or above the EPA action level of 4.0 pCi/L. Radon varies house to house, so a low-tier town still deserves a test — but knowing your town’s numbers tells you how seriously to treat it.
Directly from the New Jersey Department of Environmental Protection’s municipal radon tier assignments and published testing statistics. NJDEP classifies every municipality Tier 1 (high potential), Tier 2 (moderate), or Tier 3 (low).
Search by municipality name — NJDEP publishes the data by municipality, not ZIP (ZIP codes often span several towns). If you’re not sure of your official municipality, it’s on your property tax bill.
Test. A professional test runs about $100–$300 (or use a DIY kit for your own home). If the result is at or above 4.0 pCi/L, a certified mitigation system typically costs $800–$2,500 installed. New construction in Tier 1 towns must already include radon-resistant features under NJ’s building subcode.
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