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Radon zones in New York

The EPA assigns every county in New York to one of three radon potential zones. 34 are in Zone 1, the highest category, home to about 24% of the state's residents.

62
Counties
34
Zone 1 counties
Predicted average above 4 pCi/L
13
Zone 2 counties
Predicted average 2-4 pCi/L
15
Zone 3 counties
Predicted average below 2 pCi/L

The map

Radon potential across New York

Every county in New York, filled by the zone the EPA assigns it. Zones follow geology rather than county lines, so the colour usually changes where the bedrock does, not where the border is.

Zone 1 · 34Zone 2 · 13Zone 3 · 15

Hover a county · click to open it

County by county

All 62 New York counties

Zone 1 · > 4 pCi/LZone 2 · 2 - 4 pCi/LZone 3 · < 2 pCi/L
CountyZonePopulationCOPDSmokingLung ca. deaths
Albany County1317k5.7%10.5%31.0
Allegany County147k8.1%13.8%38.4
Broome County1196k7.7%13.2%32.7
Cattaraugus County176k9.4%16.5%38.5
Cayuga County174k8.6%15.1%35.5
Chautauqua County1125k8.8%14.9%39.3
Chemung County181k8.2%14.9%46.4
Chenango County146k9.0%15.3%36.6
Columbia County160k7.7%12.4%31.5
Cortland County146k6.9%12.8%40.7
Delaware County144k9.0%14.5%37.9
Dutchess County1297k5.9%11.0%29.3
Erie County1946k6.9%12.4%34.0
Genesee County158k7.4%13.5%41.7
Greene County147k8.0%13.5%41.8
Livingston County161k7.1%12.3%32.2
Madison County167k7.1%12.5%37.6
Onondaga County1468k6.8%11.9%35.0
Ontario County1112k6.8%11.5%31.0
Orange County1407k6.1%12.0%32.5
Otsego County160k7.2%12.1%32.9
Putnam County198k5.3%9.6%27.4
Rensselaer County1159k6.5%11.9%39.7
Schoharie County130k7.9%13.4%38.3
Schuyler County118k9.0%15.1%54.4
Seneca County132k8.7%15.3%37.0
Steuben County192k8.3%14.6%45.0
Sullivan County180k7.5%13.7%36.5
Tioga County148k8.1%13.9%32.6
Tompkins County1104k4.8%9.0%26.6
Ulster County1182k6.9%11.8%31.6
Washington County160k8.1%14.7%42.1
Wyoming County140k8.1%15.1%34.5
Yates County124k8.9%14.8%34.5
Clinton County278k7.8%14.4%42.7
Jefferson County2115k6.9%13.9%43.3
Lewis County227k8.6%15.1%27.5
Monroe County2748k6.3%11.6%30.5
Montgomery County249k8.2%15.2%42.5
Niagara County2209k7.7%13.7%39.4
Oneida County2228k8.0%14.2%36.7
Orleans County239k8.5%15.7%48.4
Oswego County2118k8.3%15.7%47.6
Saratoga County2239k5.8%10.6%31.8
Schenectady County2160k6.4%12.1%32.8
St. Lawrence County2107k8.6%15.3%40.4
Wayne County291k7.7%13.9%40.6
Bronx County31.4M6.9%13.2%20.2
Essex County337k8.3%13.5%40.8
Franklin County347k8.6%16.3%42.8
Fulton County352k9.1%16.0%44.5
Hamilton County35,0829.4%13.4%39.6
Herkimer County359k8.4%14.6%32.4
Kings County32.6M5.8%12.1%18.2
Nassau County31.4M4.8%8.5%20.4
New York County31.6M4.4%8.2%16.8
Queens County32.3M5.4%10.9%16.9
Richmond County3491k6.0%12.1%32.1
Rockland County3341k6.1%11.4%22.6
Suffolk County31.5M5.4%9.6%26.1
Warren County365k7.4%12.2%33.9
Westchester County3991k4.9%9.2%19.4

Zones from the EPA Map of Radon Zones. COPD and smoking are CDC PLACES model-based estimates of adult prevalence. Lung cancer death rates are age-adjusted deaths per 100,000 per year, 2019-2023, from NCI State Cancer Profiles. A dash means the source does not report a value for that county.

Highest potential

Zone 1 counties in New York

These 34 counties have a predicted average indoor radon screening level above the EPA action level. The EPA recommends every home in them be tested.

Other states

Radon zones elsewhere