New York Cities Ranked by Indoor Radon Levels
Measured averages from Airthings devices across New York, USA. Action level: 4 pCi/L — the threshold at which remediation is recommended.
Clayton has the highest measured indoor radon in New York at 9.6 pCi/L, based on Airthings measurements across 411 cities.
Updated October 19, 2026
Highest city
9.6pCi/L
Clayton
New York city average
2.2pCi/L
across 411 cities
Above action level
41/ 411
cities
| # | Location | Avg level | vs action level |
|---|---|---|---|
| 1 | Clayton | 9.6 pCi/L | 2.4× over |
| 2 | West Sand Lake | 7.5 pCi/L | 1.9× over |
| 3 | Horseheads North | 7.4 pCi/L | 1.9× over |
| 4 | Palenville | 7.4 pCi/L | 1.8× over |
| 5 | Balmville | 7.0 pCi/L | 1.8× over |
| 6 | Munsons Corners | 7.0 pCi/L | 1.8× over |
| 7 | Hamilton | 6.7 pCi/L | 1.7× over |
| 8 | Lakeview | 6.5 pCi/L | 1.6× over |
| 9 | Westvale | 6.4 pCi/L | 1.6× over |
| 10 | Fayetteville | 6.4 pCi/L | 1.6× over |
| 11 | Salamanca | 6.3 pCi/L | 1.6× over |
| 12 | Dryden | 6.2 pCi/L | 1.6× over |
| 13 | Kerhonkson | 6.1 pCi/L | 1.5× over |
| 14 | Keuka Park | 5.8 pCi/L | 1.4× over |
| 15 | Camillus | 5.5 pCi/L | 1.4× over |
| 16 | Oriskany | 5.5 pCi/L | 1.4× over |
| 17 | Le Roy | 5.4 pCi/L | 1.3× over |
| 18 | Averill Park | 5.4 pCi/L | 1.3× over |
| 19 | Homer | 5.3 pCi/L | 1.3× over |
| 20 | Town Line | 5.2 pCi/L | 1.3× over |
| 21 | Fishkill | 5.0 pCi/L | 1.3× over |
| 22 | Wellsville | 5.0 pCi/L | 1.2× over |
| 23 | Olean | 4.9 pCi/L | 1.2× over |
| 24 | Cortland | 4.9 pCi/L | 1.2× over |
| 25 | Hagaman | 4.7 pCi/L | 1.2× over |
| 26 | Dover Plains | 4.7 pCi/L | 1.2× over |
| 27 | Lake Pleasant | 4.7 pCi/L | 1.2× over |
| 28 | Granville | 4.6 pCi/L | 1.1× over |
| 29 | Red Oaks Mill | 4.6 pCi/L | 1.1× over |
| 30 | Gowanda | 4.5 pCi/L | 1.1× over |
| 31 | Pine Plains | 4.4 pCi/L | 1.1× over |
| 32 | Philmont | 4.3 pCi/L | 1.1× over |
| 33 | Marcellus | 4.3 pCi/L | 1.1× over |
| 34 | Suffern | 4.3 pCi/L | 1.1× over |
| 35 | Chadwicks | 4.2 pCi/L | 1.1× over |
| 36 | Manorville | 4.2 pCi/L | 1.1× over |
| 37 | Cooperstown | 4.2 pCi/L | 1.1× over |
| 38 | East Aurora | 4.1 pCi/L | 1.0× over |
| 39 | Millbrook | 4.1 pCi/L | 1.0× over |
| 40 | Valatie | 4.0 pCi/L | 1.0× over |
| 41 | Wynantskill | 4.0 pCi/L | 1.0× over |
| ✓ Below EPA action level (4 pCi/L) | |||
| 42 | Arcade | 4.0 pCi/L | 1.0× under |
| 43 | East Greenbush | 3.9 pCi/L | 1.0× under |
| 44 | Worcester | 3.8 pCi/L | 1.0× under |
| 45 | Warrensburg | 3.8 pCi/L | 1.0× under |
| 46 | Wurtsboro | 3.8 pCi/L | 1.0× under |
| 47 | Cornwall-on-Hudson | 3.7 pCi/L | 0.9× under |
| 48 | Delhi | 3.7 pCi/L | 0.9× under |
| 49 | Pleasant Valley | 3.7 pCi/L | 0.9× under |
| 50 | Naples | 3.7 pCi/L | 0.9× under |
| 51 | Lakewood | 3.6 pCi/L | 0.9× under |
| 52 | Groton | 3.6 pCi/L | 0.9× under |
| 53 | Cold Spring | 3.6 pCi/L | 0.9× under |
| 54 | Trumansburg | 3.6 pCi/L | 0.9× under |
| 55 | Voorheesville | 3.6 pCi/L | 0.9× under |
| 56 | Alexandria Bay | 3.6 pCi/L | 0.9× under |
| 57 | Holcomb | 3.5 pCi/L | 0.9× under |
| 58 | South Hill | 3.5 pCi/L | 0.9× under |
| 59 | Greenwood Lake | 3.5 pCi/L | 0.9× under |
| 60 | Watkins Glen | 3.5 pCi/L | 0.9× under |
| 61 | Lewiston | 3.5 pCi/L | 0.9× under |
| 62 | Nyack | 3.5 pCi/L | 0.9× under |
| 63 | Macedon | 3.5 pCi/L | 0.9× under |
| 64 | Canandaigua | 3.5 pCi/L | 0.9× under |
| 65 | Beacon | 3.5 pCi/L | 0.9× under |
| 66 | New Hartford | 3.4 pCi/L | 0.9× under |
| 67 | Oakdale | 3.4 pCi/L | 0.9× under |
| 68 | Washingtonville | 3.4 pCi/L | 0.9× under |
| 69 | Stamford | 3.4 pCi/L | 0.9× under |
| 70 | Gardnertown | 3.4 pCi/L | 0.9× under |
| 71 | Monticello | 3.4 pCi/L | 0.8× under |
| 72 | Lincoln Park | 3.4 pCi/L | 0.8× under |
| 73 | Hoosick Falls | 3.4 pCi/L | 0.8× under |
| 74 | Horseheads | 3.3 pCi/L | 0.8× under |
| 75 | Woodstock | 3.3 pCi/L | 0.8× under |
| 76 | Middleburgh | 3.2 pCi/L | 0.8× under |
| 77 | Niagara Falls | 3.2 pCi/L | 0.8× under |
| 78 | Owego | 3.2 pCi/L | 0.8× under |
| 79 | Rhinebeck | 3.2 pCi/L | 0.8× under |
| 80 | Brownville | 3.1 pCi/L | 0.8× under |
| 81 | Highland | 3.1 pCi/L | 0.8× under |
| 82 | Amsterdam | 3.1 pCi/L | 0.8× under |
| 83 | Schuylerville | 3.1 pCi/L | 0.8× under |
| 84 | Scotchtown | 3.0 pCi/L | 0.8× under |
| 85 | Wappingers Falls | 3.0 pCi/L | 0.8× under |
| 86 | Champlain | 3.0 pCi/L | 0.8× under |
| 87 | Corinth | 3.0 pCi/L | 0.7× under |
| 88 | Jefferson Valley-Yorktown | 3.0 pCi/L | 0.7× under |
| 89 | Port Ewen | 3.0 pCi/L | 0.7× under |
| 90 | Cazenovia | 3.0 pCi/L | 0.7× under |
| 91 | Livingston Manor | 3.0 pCi/L | 0.7× under |
| 92 | Myers Corner | 3.0 pCi/L | 0.7× under |
| 93 | Manlius | 3.0 pCi/L | 0.7× under |
| 94 | Lockport | 3.0 pCi/L | 0.7× under |
| 95 | Hampton Manor | 3.0 pCi/L | 0.7× under |
| 96 | Apalachin | 2.9 pCi/L | 0.7× under |
| 97 | Arlington | 2.9 pCi/L | 0.7× under |
| 98 | Walton Park | 2.9 pCi/L | 0.7× under |
| 99 | Chatham | 2.9 pCi/L | 0.7× under |
| 100 | Brewster | 2.9 pCi/L | 0.7× under |
| 101 | Alden | 2.9 pCi/L | 0.7× under |
| 102 | Cobleskill | 2.9 pCi/L | 0.7× under |
| 103 | Harris Hill | 2.9 pCi/L | 0.7× under |
| 104 | Clarence Center | 2.9 pCi/L | 0.7× under |
| 105 | Boonville | 2.8 pCi/L | 0.7× under |
| 106 | Purchase | 2.8 pCi/L | 0.7× under |
| 107 | Thornwood | 2.8 pCi/L | 0.7× under |
| 108 | Watertown | 2.8 pCi/L | 0.7× under |
| 109 | Altamont | 2.8 pCi/L | 0.7× under |
| 110 | Big Flats | 2.8 pCi/L | 0.7× under |
| 111 | Stone Ridge | 2.8 pCi/L | 0.7× under |
| 112 | Brewster Hill | 2.8 pCi/L | 0.7× under |
| 113 | Port Jervis | 2.8 pCi/L | 0.7× under |
| 114 | New Paltz | 2.7 pCi/L | 0.7× under |
| 115 | Pawling | 2.7 pCi/L | 0.7× under |
| 116 | Scottsville | 2.7 pCi/L | 0.7× under |
| 117 | Schoharie | 2.7 pCi/L | 0.7× under |
| 118 | Red Hook | 2.7 pCi/L | 0.7× under |
| 119 | Brinckerhoff | 2.7 pCi/L | 0.7× under |
| 120 | Plattekill | 2.7 pCi/L | 0.7× under |
| 121 | Attica | 2.6 pCi/L | 0.7× under |
| 122 | Liberty | 2.6 pCi/L | 0.7× under |
| 123 | Ithaca | 2.6 pCi/L | 0.7× under |
| 124 | West Point | 2.6 pCi/L | 0.7× under |
| 125 | Fairmount | 2.6 pCi/L | 0.7× under |
| 126 | Firthcliffe | 2.6 pCi/L | 0.7× under |
| 127 | Mahopac | 2.6 pCi/L | 0.7× under |
| 128 | Chittenango | 2.6 pCi/L | 0.6× under |
| 129 | Johnstown | 2.6 pCi/L | 0.6× under |
| 130 | Norfolk | 2.6 pCi/L | 0.6× under |
| 131 | Wallkill | 2.6 pCi/L | 0.6× under |
| 132 | Utica | 2.6 pCi/L | 0.6× under |
| 133 | Bolivar | 2.5 pCi/L | 0.6× under |
| 134 | Monroe | 2.5 pCi/L | 0.6× under |
| 135 | Springville | 2.5 pCi/L | 0.6× under |
| 136 | Pine Bush | 2.5 pCi/L | 0.6× under |
| 137 | Nedrow | 2.5 pCi/L | 0.6× under |
| 138 | Galeville | 2.5 pCi/L | 0.6× under |
| 139 | Hillside Lake | 2.5 pCi/L | 0.6× under |
| 140 | Poestenkill | 2.5 pCi/L | 0.6× under |
| 141 | Olcott | 2.5 pCi/L | 0.6× under |
| 142 | Mechanicville | 2.5 pCi/L | 0.6× under |
| 143 | Victor | 2.4 pCi/L | 0.6× under |
| 144 | Lake Carmel | 2.4 pCi/L | 0.6× under |
| 145 | Peekskill | 2.4 pCi/L | 0.6× under |
| 146 | Nassau | 2.4 pCi/L | 0.6× under |
| 147 | Pittsford | 2.4 pCi/L | 0.6× under |
| 148 | Batavia | 2.4 pCi/L | 0.6× under |
| 149 | Williamsville | 2.3 pCi/L | 0.6× under |
| 150 | Elma Center | 2.3 pCi/L | 0.6× under |
| 151 | Greene | 2.3 pCi/L | 0.6× under |
| 152 | Glens Falls North | 2.3 pCi/L | 0.6× under |
| 153 | West Albany | 2.3 pCi/L | 0.6× under |
| 154 | Ravena | 2.3 pCi/L | 0.6× under |
| 155 | East Ithaca | 2.3 pCi/L | 0.6× under |
| 156 | Orchard Park | 2.2 pCi/L | 0.6× under |
| 157 | Goshen | 2.2 pCi/L | 0.6× under |
| 158 | Scotia | 2.2 pCi/L | 0.5× under |
| 159 | Middletown | 2.2 pCi/L | 0.5× under |
| 160 | Nanuet | 2.1 pCi/L | 0.5× under |
| 161 | Pearl River | 2.1 pCi/L | 0.5× under |
| 162 | Lowville | 2.1 pCi/L | 0.5× under |
| 163 | Walden | 2.1 pCi/L | 0.5× under |
| 164 | Cairo | 2.1 pCi/L | 0.5× under |
| 165 | Seneca Knolls | 2.1 pCi/L | 0.5× under |
| 166 | Ontario | 2.1 pCi/L | 0.5× under |
| 167 | Poughkeepsie | 2.1 pCi/L | 0.5× under |
| 168 | Garden City | 2.1 pCi/L | 0.5× under |
| 169 | Lake Mohegan | 2.1 pCi/L | 0.5× under |
| 170 | Valhalla | 2.1 pCi/L | 0.5× under |
| 171 | Pleasantville | 2.1 pCi/L | 0.5× under |
| 172 | Hamburg | 2.0 pCi/L | 0.5× under |
| 173 | Armonk | 2.0 pCi/L | 0.5× under |
| 174 | Endicott | 2.0 pCi/L | 0.5× under |
| 175 | Youngstown | 2.0 pCi/L | 0.5× under |
| 176 | Port Dickinson | 2.0 pCi/L | 0.5× under |
| 177 | Hurley | 2.0 pCi/L | 0.5× under |
| 178 | Shrub Oak | 2.0 pCi/L | 0.5× under |
| 179 | Village Green | 2.0 pCi/L | 0.5× under |
| 180 | Oneonta | 2.0 pCi/L | 0.5× under |
| 181 | Pelham | 2.0 pCi/L | 0.5× under |
| 182 | East Glenville | 2.0 pCi/L | 0.5× under |
| 183 | Irondequoit | 2.0 pCi/L | 0.5× under |
| 184 | Carmel Hamlet | 2.0 pCi/L | 0.5× under |
| 185 | Skaneateles | 2.0 pCi/L | 0.5× under |
| 186 | Waterford | 2.0 pCi/L | 0.5× under |
| 187 | Watervliet | 2.0 pCi/L | 0.5× under |
| 188 | Webster | 2.0 pCi/L | 0.5× under |
| 189 | Hartsdale | 1.9 pCi/L | 0.5× under |
| 190 | Bedford | 1.9 pCi/L | 0.5× under |
| 191 | Honeoye Falls | 1.9 pCi/L | 0.5× under |
| 192 | Ogdensburg | 1.9 pCi/L | 0.5× under |
| 193 | Akron | 1.9 pCi/L | 0.5× under |
| 194 | Centerport | 1.9 pCi/L | 0.5× under |
| 195 | Lansing | 1.9 pCi/L | 0.5× under |
| 196 | New Windsor | 1.9 pCi/L | 0.5× under |
| 197 | Country Knolls | 1.9 pCi/L | 0.5× under |
| 198 | East Syracuse | 1.9 pCi/L | 0.5× under |
| 199 | Lincolndale | 1.9 pCi/L | 0.5× under |
| 200 | Otisville | 1.9 pCi/L | 0.5× under |
| 201 | Wanakah | 1.9 pCi/L | 0.5× under |
| 202 | Richfield Springs | 1.9 pCi/L | 0.5× under |
| 203 | West Hurley | 1.9 pCi/L | 0.5× under |
| 204 | Catskill | 1.9 pCi/L | 0.5× under |
| 205 | Sloatsburg | 1.9 pCi/L | 0.5× under |
| 206 | Heritage Hills | 1.9 pCi/L | 0.5× under |
| 207 | Clinton | 1.8 pCi/L | 0.5× under |
| 208 | East Rochester | 1.8 pCi/L | 0.5× under |
| 209 | Hilton | 1.8 pCi/L | 0.5× under |
| 210 | Menands | 1.8 pCi/L | 0.5× under |
| 211 | Melrose Park | 1.8 pCi/L | 0.5× under |
| 212 | Northeast Ithaca | 1.8 pCi/L | 0.5× under |
| 213 | Phoenix | 1.8 pCi/L | 0.5× under |
| 214 | Pound Ridge | 1.8 pCi/L | 0.5× under |
| 215 | Spackenkill | 1.8 pCi/L | 0.5× under |
| 216 | Endwell | 1.8 pCi/L | 0.5× under |
| 217 | North Gates | 1.8 pCi/L | 0.5× under |
| 218 | Montgomery | 1.8 pCi/L | 0.4× under |
| 219 | Binghamton | 1.8 pCi/L | 0.4× under |
| 220 | Churchville | 1.8 pCi/L | 0.4× under |
| 221 | Ticonderoga | 1.8 pCi/L | 0.4× under |
| 222 | Massapequa | 1.7 pCi/L | 0.4× under |
| 223 | New City | 1.7 pCi/L | 0.4× under |
| 224 | Fairport | 1.7 pCi/L | 0.4× under |
| 225 | Oyster Bay | 1.7 pCi/L | 0.4× under |
| 226 | Yorktown Heights | 1.7 pCi/L | 0.4× under |
| 227 | Zena | 1.7 pCi/L | 0.4× under |
| 228 | Chenango Bridge | 1.7 pCi/L | 0.4× under |
| 229 | Orange Lake | 1.7 pCi/L | 0.4× under |
| 230 | Castleton-on-Hudson | 1.7 pCi/L | 0.4× under |
| 231 | Croton-on-Hudson | 1.7 pCi/L | 0.4× under |
| 232 | Garden City Park | 1.7 pCi/L | 0.4× under |
| 233 | Beaverdam Lake-Salisbury Mills | 1.7 pCi/L | 0.4× under |
| 234 | Blasdell | 1.7 pCi/L | 0.4× under |
| 235 | Clarence | 1.7 pCi/L | 0.4× under |
| 236 | Cohoes | 1.7 pCi/L | 0.4× under |
| 237 | Shokan | 1.7 pCi/L | 0.4× under |
| 238 | Warwick | 1.7 pCi/L | 0.4× under |
| 239 | Corning | 1.7 pCi/L | 0.4× under |
| 240 | Tivoli | 1.7 pCi/L | 0.4× under |
| 241 | Pelham Manor | 1.6 pCi/L | 0.4× under |
| 242 | Delmar | 1.6 pCi/L | 0.4× under |
| 243 | Tuckahoe | 1.6 pCi/L | 0.4× under |
| 244 | Albany | 1.6 pCi/L | 0.4× under |
| 245 | Dix Hills | 1.6 pCi/L | 0.4× under |
| 246 | Mount Kisco | 1.6 pCi/L | 0.4× under |
| 247 | Rock Hill | 1.6 pCi/L | 0.4× under |
| 248 | Saugerties | 1.6 pCi/L | 0.4× under |
| 249 | Sleepy Hollow | 1.6 pCi/L | 0.4× under |
| 250 | Cheektowaga | 1.6 pCi/L | 0.4× under |
| 251 | Lancaster | 1.6 pCi/L | 0.4× under |
| 252 | Staten Island | 1.6 pCi/L | 0.4× under |
| 253 | White Plains | 1.6 pCi/L | 0.4× under |
| 254 | Milton | 1.6 pCi/L | 0.4× under |
| 255 | Lake Ronkonkoma | 1.6 pCi/L | 0.4× under |
| 256 | Rome | 1.6 pCi/L | 0.4× under |
| 257 | Fulton | 1.6 pCi/L | 0.4× under |
| 258 | Eden | 1.6 pCi/L | 0.4× under |
| 259 | Kingston | 1.6 pCi/L | 0.4× under |
| 260 | Montebello | 1.5 pCi/L | 0.4× under |
| 261 | Northwest Ithaca | 1.5 pCi/L | 0.4× under |
| 262 | Liverpool | 1.5 pCi/L | 0.4× under |
| 263 | Peach Lake | 1.5 pCi/L | 0.4× under |
| 264 | Auburn | 1.5 pCi/L | 0.4× under |
| 265 | Spencerport | 1.5 pCi/L | 0.4× under |
| 266 | Ellenville | 1.5 pCi/L | 0.4× under |
| 267 | Massena | 1.5 pCi/L | 0.4× under |
| 268 | Harrison | 1.5 pCi/L | 0.4× under |
| 269 | Hudson | 1.5 pCi/L | 0.4× under |
| 270 | Rochester | 1.5 pCi/L | 0.4× under |
| 271 | Hawthorne | 1.5 pCi/L | 0.4× under |
| 272 | Saratoga Springs | 1.5 pCi/L | 0.4× under |
| 273 | Bronxville | 1.5 pCi/L | 0.4× under |
| 274 | Commack | 1.5 pCi/L | 0.4× under |
| 275 | Marlboro | 1.5 pCi/L | 0.4× under |
| 276 | Hyde Park | 1.5 pCi/L | 0.4× under |
| 277 | Crugers | 1.4 pCi/L | 0.4× under |
| 278 | Mamaroneck | 1.4 pCi/L | 0.4× under |
| 279 | Baldwinsville | 1.4 pCi/L | 0.4× under |
| 280 | Dobbs Ferry | 1.4 pCi/L | 0.4× under |
| 281 | Hicksville | 1.4 pCi/L | 0.4× under |
| 282 | Melville | 1.4 pCi/L | 0.4× under |
| 283 | Ballston Spa | 1.4 pCi/L | 0.4× under |
| 284 | Irvington | 1.4 pCi/L | 0.4× under |
| 285 | North Syracuse | 1.4 pCi/L | 0.4× under |
| 286 | Brewerton | 1.4 pCi/L | 0.3× under |
| 287 | Livonia | 1.4 pCi/L | 0.3× under |
| 288 | Niskayuna | 1.4 pCi/L | 0.3× under |
| 289 | Lyncourt | 1.4 pCi/L | 0.3× under |
| 290 | Munsey Park | 1.4 pCi/L | 0.3× under |
| 291 | Brighton | 1.4 pCi/L | 0.3× under |
| 292 | Carmel | 1.4 pCi/L | 0.3× under |
| 293 | Chester | 1.4 pCi/L | 0.3× under |
| 294 | Larchmont | 1.4 pCi/L | 0.3× under |
| 295 | Johnson City | 1.4 pCi/L | 0.3× under |
| 296 | North Tonawanda | 1.4 pCi/L | 0.3× under |
| 297 | Rotterdam | 1.4 pCi/L | 0.3× under |
| 298 | Scarsdale | 1.4 pCi/L | 0.3× under |
| 299 | Goldens Bridge | 1.3 pCi/L | 0.3× under |
| 300 | Newburgh | 1.3 pCi/L | 0.3× under |
| 301 | Syracuse | 1.3 pCi/L | 0.3× under |
| 302 | Tappan | 1.3 pCi/L | 0.3× under |
| 303 | Crompond | 1.3 pCi/L | 0.3× under |
| 304 | Great Neck Estates | 1.3 pCi/L | 0.3× under |
| 305 | Lake Katrine | 1.3 pCi/L | 0.3× under |
| 306 | Kings Park | 1.3 pCi/L | 0.3× under |
| 307 | Briarcliff Manor | 1.3 pCi/L | 0.3× under |
| 308 | Huntington | 1.3 pCi/L | 0.3× under |
| 309 | Schenectady | 1.3 pCi/L | 0.3× under |
| 310 | Glenwood Landing | 1.3 pCi/L | 0.3× under |
| 311 | Mineola | 1.3 pCi/L | 0.3× under |
| 312 | Bedford Hills | 1.3 pCi/L | 0.3× under |
| 313 | Buffalo | 1.3 pCi/L | 0.3× under |
| 314 | Mount Vernon | 1.3 pCi/L | 0.3× under |
| 315 | Chappaqua | 1.2 pCi/L | 0.3× under |
| 316 | Grandyle Village | 1.2 pCi/L | 0.3× under |
| 317 | Greece | 1.2 pCi/L | 0.3× under |
| 318 | Jefferson Heights | 1.2 pCi/L | 0.3× under |
| 319 | Tonawanda | 1.2 pCi/L | 0.3× under |
| 320 | East Northport | 1.2 pCi/L | 0.3× under |
| 321 | East Hills | 1.2 pCi/L | 0.3× under |
| 322 | Port Washington | 1.2 pCi/L | 0.3× under |
| 323 | West Seneca | 1.2 pCi/L | 0.3× under |
| 324 | Northport | 1.2 pCi/L | 0.3× under |
| 325 | Rye | 1.2 pCi/L | 0.3× under |
| 326 | Rye Brook | 1.2 pCi/L | 0.3× under |
| 327 | West Nyack | 1.2 pCi/L | 0.3× under |
| 328 | Manhasset Hills | 1.1 pCi/L | 0.3× under |
| 329 | Syosset | 1.1 pCi/L | 0.3× under |
| 330 | Bellmore | 1.1 pCi/L | 0.3× under |
| 331 | Hastings-on-Hudson | 1.1 pCi/L | 0.3× under |
| 332 | Ossining | 1.1 pCi/L | 0.3× under |
| 333 | Sanborn | 1.1 pCi/L | 0.3× under |
| 334 | Shenorock | 1.1 pCi/L | 0.3× under |
| 335 | Franklin Square | 1.1 pCi/L | 0.3× under |
| 336 | Great Neck Plaza | 1.1 pCi/L | 0.3× under |
| 337 | New Rochelle | 1.1 pCi/L | 0.3× under |
| 338 | Putnam Lake | 1.1 pCi/L | 0.3× under |
| 339 | West Elmira | 1.1 pCi/L | 0.3× under |
| 340 | Greenville | 1.1 pCi/L | 0.3× under |
| 341 | Yonkers | 1.1 pCi/L | 0.3× under |
| 342 | Mattydale | 1.0 pCi/L | 0.3× under |
| 343 | Westmere | 1.0 pCi/L | 0.3× under |
| 344 | Woodbury | 1.0 pCi/L | 0.3× under |
| 345 | Albion | 1.0 pCi/L | 0.3× under |
| 346 | Plainview | 1.0 pCi/L | 0.3× under |
| 347 | Bellerose Terrace | 1.0 pCi/L | 0.3× under |
| 348 | Elmsford | 1.0 pCi/L | 0.3× under |
| 349 | Glen Cove | 1.0 pCi/L | 0.2× under |
| 350 | Bloomfield | 1.0 pCi/L | 0.2× under |
| 351 | Fairview | 1.0 pCi/L | 0.2× under |
| 352 | Bensonhurst | 1.0 pCi/L | 0.2× under |
| 353 | Amherst | 0.9 pCi/L | 0.2× under |
| 354 | Depew | 0.9 pCi/L | 0.2× under |
| 355 | McKownville | 0.9 pCi/L | 0.2× under |
| 356 | Port Washington North | 0.9 pCi/L | 0.2× under |
| 357 | Wesley Hills | 0.9 pCi/L | 0.2× under |
| 358 | South Fallsburg | 0.9 pCi/L | 0.2× under |
| 359 | Ardsley | 0.9 pCi/L | 0.2× under |
| 360 | New Hyde Park | 0.9 pCi/L | 0.2× under |
| 361 | Williston Park | 0.9 pCi/L | 0.2× under |
| 362 | Amagansett | 0.9 pCi/L | 0.2× under |
| 363 | Colonie | 0.9 pCi/L | 0.2× under |
| 364 | East Hampton | 0.8 pCi/L | 0.2× under |
| 365 | Lake Success | 0.8 pCi/L | 0.2× under |
| 366 | Water Mill | 0.8 pCi/L | 0.2× under |
| 367 | East Meadow | 0.8 pCi/L | 0.2× under |
| 368 | North Bellmore | 0.8 pCi/L | 0.2× under |
| 369 | Mastic Beach | 0.8 pCi/L | 0.2× under |
| 370 | Cold Spring Harbor | 0.8 pCi/L | 0.2× under |
| 371 | Brooklyn | 0.8 pCi/L | 0.2× under |
| 372 | East New York | 0.8 pCi/L | 0.2× under |
| 373 | University Gardens | 0.8 pCi/L | 0.2× under |
| 374 | Crown Heights | 0.7 pCi/L | 0.2× under |
| 375 | Upper Nyack | 0.7 pCi/L | 0.2× under |
| 376 | Levittown | 0.7 pCi/L | 0.2× under |
| 377 | Eggertsville | 0.7 pCi/L | 0.2× under |
| 378 | Seaford | 0.7 pCi/L | 0.2× under |
| 379 | Setauket-East Setauket | 0.7 pCi/L | 0.2× under |
| 380 | Katonah | 0.7 pCi/L | 0.2× under |
| 381 | West Glens Falls | 0.7 pCi/L | 0.2× under |
| 382 | Jamaica | 0.7 pCi/L | 0.2× under |
| 383 | Maybrook | 0.7 pCi/L | 0.2× under |
| 384 | The Bronx | 0.7 pCi/L | 0.2× under |
| 385 | Thomaston | 0.7 pCi/L | 0.2× under |
| 386 | Kenmore | 0.6 pCi/L | 0.2× under |
| 387 | Malverne | 0.6 pCi/L | 0.2× under |
| 388 | Borough of Queens | 0.6 pCi/L | 0.2× under |
| 389 | East Atlantic Beach | 0.6 pCi/L | 0.2× under |
| 390 | North New Hyde Park | 0.6 pCi/L | 0.2× under |
| 391 | Athens | 0.6 pCi/L | 0.1× under |
| 392 | Holbrook | 0.6 pCi/L | 0.1× under |
| 393 | Roessleville | 0.6 pCi/L | 0.1× under |
| 394 | Valley Stream | 0.6 pCi/L | 0.1× under |
| 395 | Canastota | 0.6 pCi/L | 0.1× under |
| 396 | Congers | 0.6 pCi/L | 0.1× under |
| 397 | Inwood | 0.6 pCi/L | 0.1× under |
| 398 | Long Island City | 0.6 pCi/L | 0.1× under |
| 399 | Babylon | 0.5 pCi/L | 0.1× under |
| 400 | Flower Hill | 0.5 pCi/L | 0.1× under |
| 401 | Hewlett | 0.5 pCi/L | 0.1× under |
| 402 | Merrick | 0.5 pCi/L | 0.1× under |
| 403 | Coney Island | 0.5 pCi/L | 0.1× under |
| 404 | Deer Park | 0.5 pCi/L | 0.1× under |
| 405 | Great Neck | 0.5 pCi/L | 0.1× under |
| 406 | South Lockport | 0.5 pCi/L | 0.1× under |
| 407 | West Bay Shore | 0.4 pCi/L | 0.1× under |
| 408 | Long Beach | 0.4 pCi/L | 0.1× under |
| 409 | North Bay Shore | 0.4 pCi/L | 0.1× under |
| 410 | New York City | 0.4 pCi/L | 0.1× under |
| 411 | Manhattan | 0.3 pCi/L | 0.1× under |