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      Princeton, NJ Radon Levels

      Check local Princeton radon levels and find certified testing and mitigation professionals to keep your home safe

      Princeton, NJ Radon Facts

      EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)
      County Mercer County, NJ
      Zip Code 08540
      Avg. User Level 5.50 pCi/L
      User Tests 4

      Princeton in Mercer County, serving both New York City and Trenton Metro areas, shows an average radon level of 5.17 pCi/L from recent testing data. This level exceeds the EPA action level, with readings in zip codes 08540 and 08542 ranging from 4.0 to 8.0 pCi/L. The region's diverse geology and historic housing stock with basements can contribute to elevated radon accumulation.

      5.50
      pCi/L average
      Above EPA Action Level

      Based on 4 user-submitted radon tests for homes in Princeton, NJ. The EPA recommends taking action at or above 4.0 pCi/L.

      0
      4.0 EPA
      10+

      Princeton, NJ Radon Mitigation

      Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

      Need Radon Mitigation or Testing in Princeton?

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      Princeton, NJ Radon Levels

      User-submitted radon test readings from homes in the Princeton area.

      Radon LevelCityHome AgeFoundation
      4 pCi/L Princeton, NJ 21-50 Years Full Basement
      8 pCi/L Princeton, NJ 21-50 Years Full Basement
      6 pCi/L Princeton, NJ 51-99 Years Partial Basement
      5 pCi/L Princeton, NJ 0-20 Years Full Basement

      Have a radon test result for Princeton? Submit your reading to help other homeowners.

      Radon FAQ for Princeton, NJ

      What is the average radon level in Princeton, NJ?
      Based on 4 user-submitted tests, the average radon level in Princeton is 5.50 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.
      What EPA Radon Zone is Princeton in?
      Princeton and the 08540 zip code are in Mercer County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.
      How much does radon mitigation cost in Princeton?
      Radon mitigation in Princeton typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.
      Should I test for radon if I'm buying a home in Princeton?
      Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

      Most Active Radon Markets in New Jersey

      Cities in New Jersey with the most user-submitted radon test data, ranked by number of submissions.

      CityAvg User Radon LevelSubmissions
      Cherry Hill 6.44 pCi/L 9
      Hillsborough 6.14 pCi/L 7
      Freehold 10.50 pCi/L 6
      Marlboro 6.17 pCi/L 6
      Bernardsville 7.00 pCi/L 5
      Phillipsburg 7.00 pCi/L 5
      Edison 5.60 pCi/L 5
      Princeton 5.40 pCi/L 5
      Sussex 9.75 pCi/L 4
      Piscataway 6.75 pCi/L 4

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      Free Radon Mitigation Quote

      Or call for a free quote: 1-800-299-3578 Local: 609-964-0386

      A licensed contractor will contact you immediately.

      * Required