Thornwood, NY Radon Mitigation and Testing

Q: What EPA Radon Zone is Thornwood in?

Thornwood is in Westchester County, EPA Zone 3.

Q: How much does radon mitigation cost in Thornwood?

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

Westchester County

EPA Zone 3

Situated in Westchester County within the New York City metropolitan area, Thornwood lies over metamorphic bedrock and glacial deposits that can create variable radon conditions. The community's housing consists primarily of mid-century suburban homes and newer developments, many featuring full basements where radon can concentrate. Given limited testing data currently available for zip code 10594, residents should prioritize radon testing to establish baseline readings for their homes.

Thornwood, NY Radon Mitigation

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

Thornwood, NY Radon Testing

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

Thornwood Radon Facts

Key details about the radon risk profile for Thornwood and the 10594 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Westchester County, NY

Zip Code

10594

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Thornwood and the 10594 zip code are located in Westchester County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Thornwood, NY

What EPA Radon Zone is Thornwood in?

Thornwood and the 10594 zip code are in Westchester County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Thornwood?

Radon mitigation in Thornwood 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 Thornwood?

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 York

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

City	Avg User Radon Level	Submissions
Brooklyn	10.80 pCi/L	5
Oneonta	6.50 pCi/L	4
Clifton Park	3.75 pCi/L	4
Elmira	15.00 pCi/L	3
Saugerties	10.67 pCi/L	3
Staten Island	4.00 pCi/L	3
New York	9.00 pCi/L	2
Yonkers	8.00 pCi/L	2
Horseheads	7.50 pCi/L	2
Poughkeepsie	16.00 pCi/L	1
Buffalo	4.00 pCi/L	1
Pelham	3.00 pCi/L	1