DISTRIBUTION OF RADON CONCENTRATIONS WITHIN AND AMONG COUNTIES PERCENT OF INDOOR TEST RESULTS IN VARIOUS RADON CONCENTRATION (pCi/l) RANGES
County Name < 4 4-10 10-100 >100                        Count
ADAMS 75.83 12.92 11.25 0.00                            240
ALLEN 47.83 35.34 16.72 0.11                            945
ASHLAND 46.45 35.00 17.29 1.25                         1,677
ASHTABULA 77.18 15.64 7.01 0.17                         1,170
ATHENS 55.82 34.91 9.27 0.00                         1,143
AUGLAIZE 41.64 34.70 23.66 0.00                            634
BELMONT 58.47 26.76 13.80 0.97                         1,652
BROWN 74.79 20.51 4.70 0.00                            234
BUTLER 55.20 31.92 12.26 0.62                      13,517
CARROLL 46.67 28.38 23.04 1.90                            842
CHAMPAIGN 41.30 30.94 27.29 0.46                         2,162
CLARK 43.67 33.55 22.70 0.08                         4,745
CLERMONT 56.38 33.32 10.25 0.04                         7,061
CLINTON 59.20 31.26 9.41 0.14                            723
COLUMBIANA 51.59 28.01 19.91 0.49                         2,049
COSHOCTON 39.67 28.87 30.05 1.41                            426
CRAWFORD 50.32 34.69 14.62 0.37                         1,081
CUYAHOGA 80.27 16.40 3.27 0.05                      31,019
DARKE 41.12 34.79 24.00 0.09                         1,075
DEFIANCE 74.73 20.81 4.46 0.00                            471
DELAWARE 36.87 40.40 22.68 0.06                      15,583
ERIE 50.17 31.78 17.79 0.26                         3,024
FAIRFIELD 34.99 33.87 30.77 0.37                         4,544
FAYETTE 50.84 36.87 11.73 0.56                            179
FRANKLIN 35.64 36.15 28.08 0.12                      67,269
FULTON 63.26 27.14 9.60 0.00                            479
GALLIA 79.65 18.60 1.74 0.00                            172
GEAUGA 79.80 17.58 2.54 0.08                         3,550
GREENE 46.39 33.77 19.78 0.07                      12,036
GUERNSEY 59.23 27.03 13.29 0.45                            444
HAMILTON 73.20 22.00 4.79 0.01                      31,041
HANCOCK 56.77 31.23 11.92 0.08                         2,357
HARDIN 61.72 28.71 9.57 0.00                            303
HARRISON 43.81 19.05 34.76 2.38                            210
HENRY 62.90 26.70 10.41 0.00                            221
HIGHLAND 59.07 31.66 9.27 0.00                            259
HOCKING 44.07 29.18 25.84 0.91                            329
HOLMES 42.86 29.95 25.82 1.37                            364
HURON 45.67 30.67 22.31 1.35                         1,627
JACKSON 72.97 18.92 8.11 0.00                            185
JEFFERSON 54.68 28.18 15.58 1.56                            770
KNOX 36.02 25.87 32.53 5.58                         5,577
LAKE 75.26 18.52 6.10 0.12                         5,800
LAWRENCE 80.45 15.00 4.09 0.45                            220
LICKING 29.18 30.25 38.65 1.92                      15,700
LOGAN 33.93 33.20 32.08 0.79                         1,780
LORAIN 59.90 30.26 9.83 0.01                         9,280
LUCAS 70.12 22.15 7.70 0.03                      10,758
MADISON 36.39 38.61 24.93 0.07                         1,484
MAHONING 74.86 22.04 2.95 0.15                         3,934
MARION 46.10 33.10 20.80 0.00                         1,308
MEDINA 63.70 29.90 6.36 0.04                         7,640
MEIGS 88.04 11.96 0.00 0.00                               92
MERCER 43.81 37.11 19.07 0.00                            582
MIAMI 40.19 35.43 24.19 0.19                         4,663
MONROE 57.93 32.41 9.66 0.00                            145
MONTGOMERY 54.48 30.75 14.67 0.09                      30,450
MORGAN 58.21 32.84 8.96 0.00                               67
MORROW 44.98 34.13 20.89 0.00                            627
MUSKINGUM 52.18 32.71 14.40 0.70                         1,562
NOBLE 72.73 19.70 7.58 0.00                               66
OTTAWA 60.02 27.46 12.35 0.17                         1,158
PAULDING 69.89 21.51 8.60 0.00                               93
PERRY 51.85 32.18 13.66 2.31                            432
PICKAWAY 26.71 35.79 37.30 0.20                            992
PIKE 48.01 33.83 18.16 0.00                         1,079
PORTAGE 66.07 26.94 6.97 0.02                         4,132
PREBLE 49.90 29.16 20.94 0.00                         1,046
PUTNAM 46.30 37.26 16.44 0.00                            365
RICHLAND 45.57 32.88 20.77 0.78                         4,246
ROSS 36.89 35.72 26.91 0.48                         1,464
SANDUSKY 48.53 34.86 16.24 0.37                         1,090
SCIOTO 76.05 18.37 5.58 0.00                            430
SENECA 44.32 33.81 21.67 0.20                         2,464
SHELBY 41.16 37.26 21.49 0.09                         1,103
STARK 48.12 34.18 17.44 0.26                      11,715
SUMMIT 65.90 26.46 7.39 0.25                      21,731
TRUMBULL 75.37 21.52 3.11 0.00                         2,156
TUSCARAWAS 42.68 33.36 23.25 0.71                         2,404
UNION 49.78 36.38 13.80 0.04                         2,754
VAN WERT 48.25 33.57 18.18 0.00                            143
VINTON 80.00 14.29 5.71 0.00                               35
WARREN 55.81 33.65 10.53 0.01                      13,986
WASHINGTON 65.05 25.43 9.52 0.00                         1,093
WAYNE 47.15 32.56 19.08 1.20                         3,584
WILLIAMS 59.26 22.22 18.52 0.00                            216
WOOD 61.04 28.43 10.50 0.03                         6,751
WYANDOT 57.81 28.23 13.96 0.00                            666
ALL OHIO 53.64 29.79 16.25 0.32                    406,875

 

Note: 855 data points of the total 407,730 do not have county information and hence are not included in the county analysis

 

Page updated July, 2017

(Based on  407,730 radon data points)

 

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