New York Radon Levels
34Zone 1 (High)
13Zone 2 (Moderate)
15Zone 3 (Low)
55% of counties in New York are classified as EPA Zone 1 (highest radon potential), meaning predicted average indoor radon levels exceed 4 pCi/L — the EPA action level. The EPA recommends that all homes be tested for radon, regardless of zone classification.
| County | EPA Zone | Risk Level |
|---|---|---|
| Albany County | Zone 1 | Highest Potential |
| Allegany County | Zone 1 | Highest Potential |
| Bronx County | Zone 3 | Lowest Potential |
| Broome County | Zone 1 | Highest Potential |
| Cattaraugus County | Zone 1 | Highest Potential |
| Cayuga County | Zone 1 | Highest Potential |
| Chautauqua County | Zone 1 | Highest Potential |
| Chemung County | Zone 1 | Highest Potential |
| Chenango County | Zone 1 | Highest Potential |
| Clinton County | Zone 2 | Moderate Potential |
| Columbia County | Zone 1 | Highest Potential |
| Cortland County | Zone 1 | Highest Potential |
| Delaware County | Zone 1 | Highest Potential |
| Dutchess County | Zone 1 | Highest Potential |
| Erie County | Zone 1 | Highest Potential |
| Essex County | Zone 3 | Lowest Potential |
| Franklin County | Zone 3 | Lowest Potential |
| Fulton County | Zone 3 | Lowest Potential |
| Genesee County | Zone 1 | Highest Potential |
| Greene County | Zone 1 | Highest Potential |
| Hamilton County | Zone 3 | Lowest Potential |
| Herkimer County | Zone 3 | Lowest Potential |
| Jefferson County | Zone 2 | Moderate Potential |
| Kings County | Zone 3 | Lowest Potential |
| Lewis County | Zone 2 | Moderate Potential |
| Livingston County | Zone 1 | Highest Potential |
| Madison County | Zone 1 | Highest Potential |
| Monroe County | Zone 2 | Moderate Potential |
| Montgomery County | Zone 2 | Moderate Potential |
| Nassau County | Zone 3 | Lowest Potential |
| New York County | Zone 3 | Lowest Potential |
| Niagara County | Zone 2 | Moderate Potential |
| Oneida County | Zone 2 | Moderate Potential |
| Onondaga County | Zone 1 | Highest Potential |
| Ontario County | Zone 1 | Highest Potential |
| Orange County | Zone 1 | Highest Potential |
| Orleans County | Zone 2 | Moderate Potential |
| Oswego County | Zone 2 | Moderate Potential |
| Otsego County | Zone 1 | Highest Potential |
| Putnam County | Zone 1 | Highest Potential |
| Queens County | Zone 3 | Lowest Potential |
| Rensselaer County | Zone 1 | Highest Potential |
| Richmond County | Zone 3 | Lowest Potential |
| Rockland County | Zone 3 | Lowest Potential |
| St. Lawrence County | Zone 2 | Moderate Potential |
| Saratoga County | Zone 2 | Moderate Potential |
| Schenectady County | Zone 2 | Moderate Potential |
| Schoharie County | Zone 1 | Highest Potential |
| Schuyler County | Zone 1 | Highest Potential |
| Seneca County | Zone 1 | Highest Potential |
| Steuben County | Zone 1 | Highest Potential |
| Suffolk County | Zone 3 | Lowest Potential |
| Sullivan County | Zone 1 | Highest Potential |
| Tioga County | Zone 1 | Highest Potential |
| Tompkins County | Zone 1 | Highest Potential |
| Ulster County | Zone 1 | Highest Potential |
| Warren County | Zone 3 | Lowest Potential |
| Washington County | Zone 1 | Highest Potential |
| Wayne County | Zone 2 | Moderate Potential |
| Westchester County | Zone 3 | Lowest Potential |
| Wyoming County | Zone 1 | Highest Potential |
| Yates County | Zone 1 | Highest Potential |