Certified radon testing companies in Warren County, NJ

Radon note for Warren County: 21 municipalities here are NJDEP Tier 1 (high radon potential). Testing is the only way to know your home's level — see your town's published test data:

• Allamuchy Township

  1022 homes tested · 26% ≥ 4 pCi/L

• Alpha Borough

  456 homes tested · 54% ≥ 4 pCi/L

• Belvidere Township

  968 homes tested · 54% ≥ 4 pCi/L

• Blairstown Township

  1832 homes tested · 52% ≥ 4 pCi/L

• Franklin Township

  697 homes tested · 44% ≥ 4 pCi/L

• Frelinghuysen Township

  291 homes tested · 60% ≥ 4 pCi/L

• Greenwich Township

  1460 homes tested · 41% ≥ 4 pCi/L

• Hackettstown Town

  4650 homes tested · 39% ≥ 4 pCi/L

• Hardwick Township

  254 homes tested · 54% ≥ 4 pCi/L

• Harmony Township

  320 homes tested · 58% ≥ 4 pCi/L

• Hope Township

  425 homes tested · 57% ≥ 4 pCi/L

• Independence Township

  928 homes tested · 34% ≥ 4 pCi/L

• Knowlton Township

  610 homes tested · 45% ≥ 4 pCi/L

• Liberty Township

  816 homes tested · 52% ≥ 4 pCi/L

• Lopatcong Township

  1354 homes tested · 37% ≥ 4 pCi/L

• Mansfield Township

  1380 homes tested · 41% ≥ 4 pCi/L

• Oxford Township

  674 homes tested · 47% ≥ 4 pCi/L

• Phillipsburg Town

  3145 homes tested · 42% ≥ 4 pCi/L

• Pohatcong Township

  903 homes tested · 37% ≥ 4 pCi/L

• Washington Borough and Washington Township

  4659 homes tested · 35% ≥ 4 pCi/L

• White Township

  501 homes tested · 53% ≥ 4 pCi/L