Radon note for Monmouth County: 9 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:
1547 homes tested · 25% ≥ 4 pCi/L
2311 homes tested · 38% ≥ 4 pCi/L
10384 homes tested · 35% ≥ 4 pCi/L
4135 homes tested · 25% ≥ 4 pCi/L
1868 homes tested · 27% ≥ 4 pCi/L
9789 homes tested · 22% ≥ 4 pCi/L
1488 homes tested · 31% ≥ 4 pCi/L
171 homes tested · 39% ≥ 4 pCi/L
978 homes tested · 36% ≥ 4 pCi/L
| Company | Location | Certifications | License # |
|---|---|---|---|
| Certified Environmental Contractors, LLC | Freehold, NJ | measurementmitigation | MEB94012, MIB93612 |
1 company in the NJDEP Radon Certification Program is based in Monmouth County as of 2026-07-17. Companies based elsewhere in New Jersey also commonly serve the county.
NJDEP designates 9 Monmouth County municipalities as Tier 1 (high radon potential): Allentown Borough and Upper Freehold Township, Colts Neck Township, Freehold Borough and Freehold Township, Holmdel Township, Little Silver Borough, Marlboro Township, Millstone Township, Roosevelt Borough, Shrewsbury Borough Shrewsbury Township.
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