Radon Testing in New York City & the NYC metro area

Professional radon testing in New York City & across the NYC metro area

Radon testing in New York City and the surrounding metro area is a critical step for homeowners and landlords who want to understand the air quality in their buildings. Radon is a naturally occurring radioactive gas that seeps into structures from soil and rock beneath foundations, and it poses serious health risks when it accumulates indoors over time. Many of the older pre-1978 buildings throughout Manhattan, Brooklyn, Queens, The Bronx, and Staten Island—as well as properties in Westchester County and Nassau County communities like Yonkers, New Rochelle, Mount Vernon, White Plains, Hempstead, Long Beach, and Great Neck—are particularly susceptible to radon infiltration due to aging foundations, cracks in concrete, and deteriorated basement seals. Our certified inspectors perform radon sampling using professional-grade equipment deployed over a minimum 48-hour period to capture representative air samples from the lowest livable level of your property, which is typically where radon concentrations are highest.

Radon testing becomes essential for several situations: when purchasing or renting a property in the NYC metro area, especially older homes built before modern radon-resistant construction standards; after foundation repairs or water damage that may have altered soil-gas entry pathways; during post-renovation testing to ensure new work did not compromise the building envelope; or simply as part of routine indoor air quality assessment for tenant health and safety. Landlords in New York City's five boroughs and surrounding counties often request radon testing to meet due-diligence obligations and protect occupants. The U.S. Environmental Protection Agency recommends testing all homes, and New York State guidelines encourage testing in areas with moderate to high radon potential, which includes much of the NYC region.

Our sampling process involves placing calibrated radon detectors in the lowest occupied level of your building—typically a basement, crawlspace, or ground-floor room—for a continuous 48-hour to 7-day measurement period, depending on your situation and preferred confidence level. After the sampling window closes, our certified inspectors retrieve the equipment and submit it to our accredited third-party laboratory for analysis. The lab measures radon concentration in picocuries per liter (pCi/L) using EPA-approved methods and issues a detailed written report within 5 to 10 business days. This report documents the radon level found, explains what that level means in relation to EPA action levels (4.0 pCi/L is the federal guideline), describes any limitations of the test, and provides context for your specific property type and location within the NYC metro area.

We are certified independent testers with no financial stake in remediation sales, which means our radon findings are unbiased and based solely on measurement data from accredited laboratories. This independence is especially important for landlords and property owners in New York City, Westchester, and Nassau County who need trustworthy air quality documentation for legal, insurance, or tenant-communication purposes. Our written lab reports serve as the official record of radon levels in your building and can inform decisions about whether mitigation is necessary, help you comply with local or state disclosure requirements, and give you confidence that your indoor air quality has been properly assessed by qualified professionals using certified equipment and rigorous protocols.

Why homeowners across the NYC metro area choose Air Quality Testing NYC

Certified inspectors, independent accredited-lab analysis
Fast scheduling across all five boroughs & the metro
Clear written report you can actually act on
Upfront pricing — free quotes, no upsell to remediation

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