Measured Basement Screening Radon Levels by County, September 2014

County Homes
Tested
Radon Screening Values (pCi/L) Number of Homes
Average GEO Mean GEO SD Maximum <4 pCi/L ≥4 & <20 pCi/L ≥20 pCi/L
ALBANY 2,541 5.50 2.02 3.35 394.60 1,910 521 110
ALLEGANY 531 10.75 4.66 3.82 216.60 239 218 74
BROOME 3,270 5.91 2.87 3.26 210.70 2,036 1,045 189
CATTARAUGUS 1,449 9.48 4.20 3.35 522.10 717 569 163
CAYUGA 1,198 4.74 2.84 2.63 145.60 800 362 36
CHAUTAUQUA 1,009 6.08 2.73 3.51 141.00 652 300 57
CHEMUNG 2,031 12.47 7.03 3.24 118.30 602 1,017 412
CHENANGO 661 9.71 4.89 3.32 105.50 279 299 83
CLINTON 229 2.07 1.20 2.84 23.20 203 25 1
COLUMBIA 660 6.94 3.71 3.15 298.00 322 298 40
CORTLAND 1,623 14.66 8.55 3.22 125.30 381 862 380
DELAWARE 723 8.26 3.95 3.42 180.40 355 303 65
DUTCHESS 3,167 6.89 4.03 3.00 135.20 1,454 1,539 174
ERIE 7,278 5.28 1.65 3.93 391.10 5,634 1,241 403
ESSEX 165 1.61 1.05 2.46 26.30 156 8 1
FRANKLIN 107 1.27 0.89 2.43 6.20 105 2 0
FULTON 149 2.63 1.46 2.80 30.10 128 18 3
GENESEE 705 7.68 3.29 3.02 322.70 451 207 47
GREENE 344 6.86 2.92 3.39 245.20 212 116 16
HAMILTON 21 1.49 1.00 2.54 5.50 19 2 0
HERKIMER 300 6.19 3.46 2.95 74.10 168 116 16
JEFFERSON 262 5.16 1.93 3.46 336.30 190 65 7
LEWIS 110 4.62 2.35 2.87 107.60 78 29 3
LIVINGSTON 849 7.95 3.56 3.23 157.60 480 300 69
MADISON 1,130 6.12 3.24 2.97 203.60 662 410 58
MONROE 2,590 3.75 1.78 2.78 405.60 2,145 381 64
MONTGOMERY 236 4.08 2.24 3.17 44.00 159 72 5
NASSAU 754 1.47 1.02 2.38 13.90 714 40 0
NEW YORK 1,408 1.58 0.90 2.83 49.50 1,311 92 5
NIAGARA 1,359 1.80 1.07 2.62 65.40 1,245 109 5
ONEIDA 2,182 5.73 2.92 3.22 107.80 1,351 712 119
ONONDAGA 8,956 8.20 3.62 3.60 348.80 4,742 3,416 798
ONTARIO 645 5.50 3.04 2.88 125.00 402 214 29
ORANGE 2,407 5.30 2.87 2.99 160.80 1,479 843 85
ORLEANS 515 3.61 1.92 2.78 86.40 408 96 11
OSWEGO 273 2.48 1.44 2.65 54.60 238 31 4
OTSEGO 1,372 8.88 4.49 3.36 350.80 594 648 130
OUT OF STATE 195 3.92 2.22 2.98 52.10 137 55 3
PUTNAM 1,002 4.77 2.66 2.90 235.20 650 326 26
RENSSELAER 2,058 6.90 3.41 3.44 134.70 1,113 798 147
ROCKLAND 2,607 2.55 1.54 2.61 123.70 2,217 367 23
SARATOGA 1,425 4.29 2.28 2.96 142.20 1,033 356 36
SCHENECTADY 1,150 4.91 2.08 3.09 186.40 880 226 44
SCHOHARIE 324 6.10 3.09 3.15 94.00 191 112 21
SCHUYLER 183 6.01 3.40 2.92 80.40 104 72 7
SENECA 196 2.93 1.84 2.70 19.50 159 37 0
ST.LAWRENCE 336 2.86 1.52 2.80 66.50 290 39 7
STEUBEN 1,468 11.87 6.20 3.40 415.20 493 729 246
SUFFOLK 519 1.80 1.16 2.54 42.60 481 35 3
SULLIVAN 234 3.75 2.02 3.03 46.00 172 56 6
TIOGA 929 10.50 4.91 3.60 236.80 400 406 123
TOMPKINS 1,618 5.06 2.87 2.92 206.80 996 570 52
ULSTER 1,398 5.15 2.89 2.79 175.70 892 461 45
UNKNOWN 26 4.63 2.15 3.53 34.50 18 7 1
WARREN 275 3.43 1.71 2.86 90.10 229 40 6
WASHINGTON 573 6.22 3.28 3.18 73.60 328 211 34
WAYNE 597 4.62 2.54 2.84 63.60 429 143 25
WESTCHESTER 2,480 2.86 1.73 2.67 95.40 2,050 405 25
WYOMING 531 9.94 4.38 3.68 226.20 255 213 63
YATES 186 5.70 3.33 2.75 69.00 106 70 10

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