Syosset, NY Radon Levels

Q: What EPA Radon Zone is Syosset in?

Syosset is in Nassau County, EPA Zone 3.

Q: How much does radon mitigation cost in Syosset?

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

Check local Syosset radon levels and find certified testing and mitigation professionals to keep your home safe

Syosset, NY Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)

County Nassau County, NY

Zip Code 11791

Syosset in Nassau County sits on Long Island's glacially-deposited soils over bedrock formations typical of the New York City metro region. Local testing data remains limited, making professional radon testing essential for homeowners in zip code 11791. The area's mix of mid-century suburban homes and newer construction, many with finished basements, creates conditions where radon can accumulate undetected.

Syosset, NY Radon Mitigation

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

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Radon FAQ for Syosset, NY

What EPA Radon Zone is Syosset in?

Syosset and the 11791 zip code are in Nassau 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 Syosset?

Radon mitigation in Syosset 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 Syosset?

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 in New York with the most user-submitted radon test data, ranked by number of submissions.

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