Riverhead, NY Radon Levels

Q: What EPA Radon Zone is Riverhead in?

Riverhead is in Suffolk County, EPA Zone 3.

Q: How much does radon mitigation cost in Riverhead?

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

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

Riverhead, NY Radon Facts

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

County Suffolk County, NY

Zip Code 11901

Serving as the county seat of Suffolk County on Long Island's North Fork, Riverhead sits on glacial outwash plains and marine deposits that generally produce lower radon levels compared to mainland New York areas. The community features a diverse housing mix from historic downtown buildings to modern suburban developments, with many homes built on slab or crawl space foundations rather than full basements. While radon testing data for zip code 11901 remains limited, the coastal geography typically results in lower risk levels, though testing is still recommended.

Riverhead, 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 Riverhead, NY

What EPA Radon Zone is Riverhead in?

Riverhead and the 11901 zip code are in Suffolk 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 Riverhead?

Radon mitigation in Riverhead 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 Riverhead?

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