New York: 62 counties covered
Of 62 rated New York counties, 34 are in EPA's highest radon-potential zone (Zone 1) — but every county page links to testing guidance regardless of zone, because a county rating is a county-wide average, not a reading for any one house.
- Kings County
- Queens County
- New York County
- Suffolk County
- Nassau County
- Bronx County
- Westchester County
- Erie County
- Monroe County
- Richmond County
- Onondaga County
- Orange County
- Rockland County
- Albany County
- Dutchess County
- Saratoga County
- Oneida County
- Niagara County
- Broome County
- Ulster County
- Schenectady County
- Rensselaer County
- Chautauqua County
- Oswego County
- Jefferson County
- Ontario County
- St. Lawrence County
- Tompkins County
- Putnam County
- Steuben County
- Wayne County
- Chemung County
- Sullivan County
- Clinton County
- Cattaraugus County
- Cayuga County
- Madison County
- Warren County
- Livingston County
- Otsego County
- Columbia County
- Washington County
- Herkimer County
- Genesee County
- Fulton County
- Montgomery County
- Tioga County
- Allegany County
- Franklin County
- Greene County
- Cortland County
- Chenango County
- Delaware County
- Orleans County
- Wyoming County
- Essex County
- Seneca County
- Schoharie County
- Lewis County
- Yates County
- Schuyler County
- Hamilton County