Measured Basement Screening Radon Levels by County - October 2011

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 2,363 5.20 2.01 3.33 338.50 1,783 478 102
ALLEGANY 502 10.99 4.73 3.86 216.60 221 211 70
BROOME 3,223 5.88 2.88 3.25 210.70 2,008 1,028 187
CATTARAUGUS 1,418 9.39 4.21 3.36 522.10 699 558 161
CAYUGA 1,125 4.81 2.86 2.65 145.60 750 339 36
CHAUTAUQUA 991 6.09 2.73 3.52 141.00 640 296 55
CHEMUNG 1,987 12.54 7.08 3.24 118.30 586 995 406
CHENANGO 647 9.80 4.94 3.31 105.50 271 293 83
CLINTON 194 2.07 1.19 2.89 23.20 173 20 1
COLUMBIA 639 6.87 3.66 3.15 298.00 316 286 37
CORTLAND 1,537 14.88 8.75 3.18 125.30 352 817 368
DELAWARE 709 8.24 3.93 3.42 180.40 349 298 62
DUTCHESS 3,101 6.84 4.03 2.99 135.20 1,422 1,514 165
ERIE 6,826 5.36 1.67 3.94 371.90 5,262 1,177 387
ESSEX 161 1.62 1.05 2.46 26.30 152 8 1
FRANKLIN 99 1.31 0.91 2.47 6.20 97 2 0
FULTON 143 2.66 1.45 2.84 30.10 122 18 3
GENESEE 695 7.74 3.31 3.03 322.70 442 206 47
GREENE 323 7.09 2.99 3.41 245.20 197 110 16
HAMILTON 21 1.49 1.00 2.54 5.50 19 2 0
HERKIMER 294 6.11 3.45 2.94 74.10 164 115 15
JEFFERSON 253 4.91 1.89 3.43 336.30 184 63 6
LEWIS 104 4.80 2.44 2.90 107.60 72 29 3
LIVINGSTON 802 8.09 3.58 3.26 157.60 456 280 66
MADISON 1,087 6.18 3.28 2.96 203.60 635 396 56
MONROE 2,347 3.88 1.81 2.80 405.60 1,945 340 62
MONTGOMERY 227 4.17 2.29 3.19 44.00 152 70 5
NASSAU 730 1.46 1.02 2.36 13.90 692 38 0
NEW YORK 1,341 1.58 0.90 2.83 49.50 1,250 86 5
NIAGARA 1,194 1.82 1.08 2.63 65.40 1,089 101 4
ONEIDA 2,121 5.66 2.89 3.20 107.80 1,323 685 113
ONONDAGA 8,534 8.16 3.62 3.61 346.70 4,509 3,263 762
ONTARIO 611 5.57 3.03 2.92 125.00 384 199 28
ORANGE 2,273 5.33 2.96 2.89 160.80 1,382 812 79
ORLEANS 513 3.59 1.91 2.77 86.40 407 95 11
OSWEGO 263 2.30 1.42 2.57 29.60 231 29 3
OTSEGO 1,264 8.59 4.48 3.33 299.70 542 609 113
OUT OF STATE 193 3.95 2.26 2.93 52.10 135 55 3
PUTNAM 940 4.78 2.65 2.91 235.20 613 302 25
RENSSELAER 1,911 6.76 3.41 3.38 134.70 1,037 748 126
ROCKLAND 2,461 2.56 1.55 2.61 123.70 2,093 345 23
SARATOGA 1,284 4.22 2.28 2.92 142.20 935 318 31
SCHENECTADY 1,065 4.81 2.07 3.06 186.40 821 203 41
SCHOHARIE 308 5.93 3.12 3.07 89.20 180 108 20
SCHUYLER 177 5.94 3.32 2.93 80.40 103 67 7
SENECA 190 2.89 1.83 2.70 19.50 154 36 0
ST.LAWRENCE 316 2.89 1.51 2.80 66.50 272 37 7
STEUBEN 1,430 11.96 6.24 3.41 415.20 476 712 242
SUFFOLK 497 1.82 1.16 2.53 42.60 460 34 3
SULLIVAN 229 3.75 2.05 2.93 46.00 169 54 6
TIOGA 916 10.49 4.93 3.58 236.80 393 402 121
TOMPKINS 1,406 5.06 2.85 2.92 206.80 872 489 45
ULSTER 1,368 5.11 2.89 2.76 175.70 873 454 41
UNKNOWN 26 4.63 2.15 3.53 34.50 18 7 1
WARREN 254 3.41 1.66 2.85 90.10 215 33 6
WASHINGTON 487 6.23 3.26 3.19 73.60 282 177 28
WAYNE 581 4.62 2.54 2.84 63.60 418 138 25
WESTCHESTER 2,429 2.86 1.73 2.66 95.40 2,010 394 25
WYOMING 515 10.09 4.44 3.69 226.20 247 206 62
YATES 175 5.43 3.18 2.71 69.00 104 63 8

Report includes results from charcoal and soil detectors.

Only Basement readings selected.

Only Screening readings selected.

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