Greenwich, NJ Radon Mitigation and Testing

Q: What EPA Radon Zone is Greenwich in?

Greenwich is in Cumberland County, EPA Zone 2.

Q: How much does radon mitigation cost in Greenwich?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Cumberland County

EPA Zone 2

Positioned in Cumberland County in southern New Jersey's agricultural region, Greenwich (08323) rests on Coastal Plain sediments that typically result in lower radon potential. Although current radon testing data is limited for this historic Delaware Bay community, residents should still consider professional testing to establish baseline levels. The area's mix of colonial-era homes and modern construction creates varying foundation types that can influence radon entry patterns.

Greenwich, NJ Radon Mitigation

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

Greenwich, NJ Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Greenwich Radon Facts

Key details about the radon risk profile for Greenwich and the 08323 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Cumberland County, NJ

Zip Code

08323

Predicted Screening Level

2–4 pCi/L (Zone 2)

Greenwich and the 08323 zip code are located in Cumberland County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Greenwich, NJ

What EPA Radon Zone is Greenwich in?

Greenwich and the 08323 zip code are in Cumberland County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Greenwich?

Radon mitigation in Greenwich 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 Greenwich?

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 with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
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
Caldwell	5.00 pCi/L	4
Atlantic Highlands	4.75 pCi/L	4
West Orange	4.00 pCi/L	4
Basking Ridge	3.75 pCi/L	4
Hackettstown	3.75 pCi/L	4
Livingston	3.25 pCi/L	4
Nutley	3.25 pCi/L	4
Sicklerville	7.00 pCi/L	3
Clifton	6.00 pCi/L	3
Westfield	6.00 pCi/L	3