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New York City Metro, NJ Radon Information

The New York City Metro metropolitan area in New Jersey has a regional average radon level of 5.8 pCi/L based on 288 user-submitted tests. This exceeds the EPA’s recommended action level of 4.0 pCi/L, meaning radon testing and professional mitigation should be a priority for homeowners across the region.

Radon is a naturally occurring radioactive gas produced by the decay of uranium in soil and bedrock. In the New York City Metro area, local geology and common residential construction—particularly homes with basements and crawlspaces—allow radon to seep indoors and accumulate to dangerous concentrations. Particularly high readings have been recorded in communities like Hillsborough, Freehold, Marlboro, where professional radon testing and mitigation services are strongly recommended.

Whether you are buying a home, selling a property, or simply want to protect your family, a professional radon test is the only way to know your home’s levels. If elevated radon is found, a licensed mitigation contractor can install a sub-slab depressurization system—typically in one day—to reduce levels by up to 99%. Request a free radon mitigation quote

The regional average is 5.8 pCi/L — above the EPA action level of 4.0 pCi/L. Testing and mitigation are strongly recommended.

5.8

Avg. pCi/L

157

Cities

288

User Tests

Zone 1

EPA Rating

Above EPA Action Level

Below EPA Action Level

Top 5 Radon Hotspots in the New York City Metro Area

Cities with the highest average user-submitted radon readings in the New York City Metro metropolitan area.

Rank	City	Avg. Radon Level	Tests
1	Hillsborough	6.10 pCi/L	7
2	Freehold	10.50 pCi/L	6
3	Marlboro	6.20 pCi/L	6
4	Sussex	10.20 pCi/L	5
5	Edison	5.60 pCi/L	5

Other Metro Areas in New Jersey

Explore radon data for other metropolitan regions across the state.

Allentown Metro

View radon data

Atlantic City Metro

View radon data

Philadelphia Metro

View radon data

View radon data

View radon data

Cities in the New York City Metro Area

157 cities and towns in the New York City Metro metropolitan area with user-submitted radon data.

157 cities

Above EPA action level

Above EPA action level

Above EPA action level

Secaucus Zone 1

Above EPA action level

Titusville Zone 1

Above EPA action level

Highland Lakes Zone 1

Above EPA action level

Budd Lake Zone 1

Above EPA action level

Above EPA action level

Mountain Lakes Zone 1

Above EPA action level

Above EPA action level

Watchung Zone 1

Above EPA action level

Freehold Zone 1

Above EPA action level

Above EPA action level

Carteret Zone 1

Above EPA action level

Lambertville Zone 1

Above EPA action level

Above EPA action level

Above EPA action level

Manville Zone 1

Above EPA action level

Stirling Zone 1

Above EPA action level

Bloomingdale Zone 1

Above EPA action level

Hillside Zone 1

Above EPA action level

Edgewater Zone 1

Above EPA action level

Hopatcong Zone 1

Above EPA action level

Jersey City Zone 1

Above EPA action level

Long Valley Zone 1

Above EPA action level

New Providence Zone 1

Above EPA action level

Above EPA action level

Above EPA action level

Red Bank Zone 1

Above EPA action level

Toms River Zone 1

Above EPA action level

West Milford Zone 1

Above EPA action level

Bernardsville Zone 1

Above EPA action level

Flemington Zone 1

Above EPA action level

Above EPA action level

Above EPA action level

Glenwood Zone 1

Above EPA action level

South Orange Zone 1

Above EPA action level

Allentown Zone 1

Above EPA action level

Cedar Grove Zone 1

Above EPA action level

Little Silver Zone 1

Above EPA action level

Montvale Zone 1

Above EPA action level

Shrewsbury Zone 1

Above EPA action level

Piscataway Zone 1

Above EPA action level

Above EPA action level

North Brunswick Zone 1

Above EPA action level

Marlboro Zone 1

Above EPA action level

Hillsborough Zone 1

Above EPA action level

Above EPA action level

Above EPA action level

Westfield Zone 1

Above EPA action level

Millstone Township Zone 1

Above EPA action level

Ringwood Zone 1

Above EPA action level

Above EPA action level

Englishtown Zone 1

Above EPA action level

Above EPA action level

Lakewood Zone 1

Above EPA action level

Above EPA action level

Morristown Zone 1

Above EPA action level

Above EPA action level

Princeton Zone 1

Above EPA action level

Above EPA action level

High Bridge Zone 1

Above EPA action level

Above EPA action level

Whitehouse Station Zone 1

Above EPA action level

Above EPA action level

Above EPA action level

Monroe Township Zone 1

Above EPA action level

South Plainfield Zone 1

Above EPA action level

Caldwell Zone 1

Above EPA action level

Annandale Zone 1

Above EPA action level

Above EPA action level

Stanhope Zone 1

Above EPA action level

Washington Zone 1

Above EPA action level

Bloomfield Zone 1

Above EPA action level

Above EPA action level

Above EPA action level

Bayville Zone 1

Above EPA action level

Bloomsbury Zone 1

Above EPA action level

Colts Neck Zone 1

Above EPA action level

Cresskill Zone 1

Above EPA action level

Dunellen Zone 1

Above EPA action level

Above EPA action level

Hopewell Zone 1

Above EPA action level

Above EPA action level

Above EPA action level

Above EPA action level

Parsippany Zone 1

Above EPA action level

Roselle Park Zone 1

Above EPA action level

Springfield Zone 1

Above EPA action level

Succasunna Zone 1

Above EPA action level

Wallington Zone 1

Above EPA action level

Weehawken Zone 1

Above EPA action level

Above EPA action level

Atlantic Highlands Zone 1

Above EPA action level

East Hanover Zone 1

Above EPA action level

Kenilworth Zone 1

Above EPA action level

Above EPA action level

Metuchen Zone 1

Above EPA action level

Above EPA action level

Above EPA action level

Woodcliff Lake Zone 1

Above EPA action level

Randolph Zone 1

Above EPA action level

West Orange Zone 3

Below EPA action level

East Brunswick Zone 3

Below EPA action level

Ridgewood Zone 3

Below EPA action level

Rockaway Zone 3

Below EPA action level

Somerset Zone 3

Below EPA action level

Berkeley Heights Zone 3

Below EPA action level

Cranford Zone 3

Below EPA action level

Below EPA action level

Englewood Cliffs Zone 3

Below EPA action level

Florham Park Zone 3

Below EPA action level

Hillsdale Zone 3

Below EPA action level

Below EPA action level

Below EPA action level

Lyndhurst Zone 3

Below EPA action level

Maplewood Zone 3

Below EPA action level

Middletown Zone 3

Below EPA action level

Montville Zone 3

Below EPA action level

Mount Arlington Zone 3

Below EPA action level

Park Ridge Zone 3

Below EPA action level

Paterson Zone 3

Below EPA action level

Scotch Plains Zone 3

Below EPA action level

Union City Zone 3

Below EPA action level

Below EPA action level

West New York Zone 3

Below EPA action level

Basking Ridge Zone 3

Below EPA action level

Hackettstown Zone 3

Below EPA action level

Barnegat Zone 3

Below EPA action level

Denville Zone 3

Below EPA action level

Plainfield Zone 3

Below EPA action level

Plainsboro Zone 3

Below EPA action level

Franklin Lakes Zone 3

Below EPA action level

Livingston Zone 3

Below EPA action level

Below EPA action level

Pompton Lakes Zone 3

Below EPA action level

Below EPA action level

Waldwick Zone 3

Below EPA action level

Below EPA action level

Bridgewater Zone 3

Below EPA action level

Demarest Zone 3

Below EPA action level

Elizabeth Zone 3

Below EPA action level

Farmingdale Zone 3

Below EPA action level

Below EPA action level

Little Falls Zone 3

Below EPA action level

Perth Amboy Zone 3

Below EPA action level

Pine Brook Zone 3

Below EPA action level

Below EPA action level

Below EPA action level

Below EPA action level

Below EPA action level

Below EPA action level

Pompton Plains Zone 3

Below EPA action level

Short Hills Zone 3

Below EPA action level

Stockton Zone 3

Below EPA action level

Below EPA action level

Manahawkin Zone 3

Below EPA action level

Radon Mitigation Professionals Serving the New York City Metro Area

Licensed contractors who serve this metro area.

Company
ABC Environmental
AEI Consultants
Clean Vapor LLC
Dico Building Inspection Service Inc
Environmental Health Investigations Inc
Matrix New World Engineering Inc
Partner Engineering & Science Inc
Professional Radon Systems Inc
RAdata Inc
Radon Shield LLC
Rutgers University
Trusted Home Inspections LLC

Frequently Asked Questions about Radon in the New York City Metro Area

Common questions about radon testing, mitigation costs, and health risks for homeowners in the New York City Metro metropolitan area.

Why are radon levels so high in the New York City Metro area?

Radon levels in the New York City Metro area are driven by the local soil and bedrock composition, which contains naturally occurring uranium. As uranium decays, it produces radon gas that migrates upward through the soil and enters homes through foundation cracks, sump pits, and gaps around pipes. Homes with basements and crawlspaces are especially susceptible because these below-grade spaces are in direct contact with the soil where radon concentrations are highest.

How much does radon mitigation cost in New York City Metro?

Professional radon mitigation in the New York City Metro metropolitan area typically costs between $800 and $2,500, depending on the size and construction of your home. The most common approach is an active sub-slab depressurization system, which a certified contractor can usually install in a single day. Ongoing energy costs for the mitigation fan are minimal—roughly $5–$10 per month—and most systems reduce radon levels by 90% or more.

Are landlords in New Jersey required to test for radon?

Radon testing and disclosure requirements vary by state and municipality. Some New Jersey jurisdictions require landlords to disclose known radon levels or test results, while others have no mandate. Regardless of local law, the EPA recommends radon testing for all residential properties—including rentals—since radon is the second leading cause of lung cancer in the United States.

Can I sell a house with high radon levels in the New York City Metro area?

Yes. High radon levels do not prevent a home sale, but buyers in the New York City Metro market routinely request radon testing during the inspection period. If levels exceed 4.0 pCi/L, the buyer may negotiate for the seller to install a mitigation system before closing. Having a radon mitigation system already in place can actually be a selling point, demonstrating proactive home maintenance and providing documented proof of safe indoor air quality.

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