HE
Hera Environmental Laboratories
4.6 (51 Google reviews)
Identity Verified
Full Service•Cherry Hill Township, NJ
MitigationTesting
Free Estimates
Radon Pros in New Jersey
19 contractorsEPA zone context: Northern New Jersey along the Reading Prong is Zone 1 — one of the highest-radon areas in the US. Central and southern NJ are Zone 2-3.
R
RAdata
4.9 (2597 Google reviews)
Certified Professional
Licensed Provider: Emily Ambrosi
Full Service•Flanders, NJ
MitigationTestingCrawlspaceWater TreatmentPost-Test
Certified RMP/RMSFree Estimates
RAdata is a dedicated radon services company serving Flanders, NJ. Established in 1984. Services include radon testing, radon measurement, radon mitigation system installation, mitigation system design. Works with basements, crawlspaces. Methods include heat recovery ventilation. Holds Certified Radon Measurement Professional and Certified Radon Mitigation Specialist certifications. Rated 4.9/5 on Google based on 2597 reviews. Offers free estimates, real estate transaction testing, rush/priority scheduling.
SA
Safe Air Systems Radon Mitigation LLC
5.0 (291 Google reviews)
Identity Verified
Full Service•Flemington, NJ
MitigationTestingCrawlspaceCommercialWater Treatment+2
Safe Air Systems Radon Mitigation LLC is a dedicated radon services company serving Flemington, NJ. Services include radon testing, radon mitigation system installation. Works with slab foundations, crawlspaces. Methods include sub-slab depressurization, sub-membrane depressurization, heat recovery ventilation. Rated 5.0/5 on Google based on 291 reviews. Offers real estate transaction testing.
EI
EAI, Inc.
5.0 (5 Google reviews)
Certified Professional
Licensed Provider: Zarah Thanasides
Full Service•Jersey City, NJ
MitigationTestingVapor Barrier
Certified RMS
EAI, Inc. is a contractor offering radon-related services serving Jersey City, NJ. Services include radon mitigation system installation, mitigation system design. Holds Certified Radon Mitigation Specialist certification. Rated 5.0/5 on Google based on 5 reviews.
RA
Roux Associates, Inc.
Certified Professional
Licensed Provider: Mikhail Fradkin
Full Service•Manalapan, NJ
MitigationTestingCommercial
Certified RMP/RMS
FT
MitigationTesting
OS
Obar Systems INC.
4.6 (36 Google reviews)
Certified Professional
Licensed Provider: Sean P Mulcahy
Full Service•Newton, NJ
MitigationTestingNew ConstructionCommercialWater Treatment+1
Certified RMS
Obar Systems INC. is a dedicated radon services company serving Newton, NJ. Services include radon mitigation system installation, mitigation system design. Methods include heat recovery ventilation. Holds Certified Radon Mitigation Specialist certification. Rated 4.6/5 on Google based on 36 reviews.
SC
Sovereign Consulting Inc.
Certified Professional
Licensed Provider: Larry S Hoeger
Testing Specialist•Robbinsville, NJ
TestingCommercial
Certified RMS
Data provided by Google Maps
State Info
Radon levels vary house-to-house even in the same city. Testing your own home is the only reliable way to know your risk.
Popular Cities for Radon Mitigation in New Jersey
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FAQ: Radon Mitigation in New Jersey
Does New Jersey require radon testing for home sales?
Not mandated by law, but it's extremely common in northern NJ transactions. Many municipalities have local disclosure requirements.
Which NJ counties have the worst radon?
Hunterdon, Somerset, Morris, Warren, and Sussex counties along the Reading Prong consistently test highest.
How much does radon mitigation cost in New Jersey?
Most homeowners in New Jersey see mitigation quotes in the low-thousands, but the final cost depends on foundation type, fan location, and pipe routing complexity. A cost calculator can help you benchmark estimates before requesting bids.
Do I need radon testing in New Jersey before hiring a contractor?
Yes. A valid short-term or long-term test is the fastest way to confirm if mitigation is needed and to scope the right system design.
What radon level is dangerous in New Jersey?
EPA recommends action at 4.0 pCi/L, and many homeowners choose to reduce levels even below that threshold. Northern New Jersey along the Reading Prong is Zone 1 — one of the highest-radon areas in the US. Central and southern NJ are Zone 2-3. ZIP-level lookup tools are useful for local context, but home testing is still required.
How do I choose a certified radon contractor in New Jersey?
Look for current NRPP or NRSB credentials, ask for post-mitigation test expectations, and confirm local compliance details. New Jersey requires all radon testers and mitigators to be certified by the NJ DEP. The state has its own certification exam beyond national NRPP requirements.
State Resources for New Jersey
Radon mitigation cost in New Jersey
Estimate likely project pricing by foundation type and system complexity.
Radon testing guide for New Jersey homes
Learn when and how to test, plus how to interpret pCi/L results.
Radon levels and EPA zones in New Jersey
See how state-level risk varies and what zone maps can and cannot tell you.
ZIP-level radon risk in New Jersey
Check projected local risk by ZIP code before you request quotes.