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Ontario County
Indoor Radon Estimates
Percent Homes Above 4 pCi/L
June 1999

Town or City
homes
measured
living area*
basement**
best
estimate
(%)
range #
(%)
best
estimate
(%)
range #
(%)
Bristol town 5 14 (8 - 20) 47 (35 - 58)
Canadice town 7 7 (3 - 12) 30 (19 - 39)
Canandaigua city 32 3 (2 - 6) 16 (12 - 20)
Canandaigua town 27 6 (4 - 9) 27 (21 - 33)
East Bloomfield town 26 11 (8 - 16) 42 (35 - 50)
Farmington town 33 21 (17 - 26) 53 (47 - 59)
Geneva city 35 5 (3 - 7) 24 (18 - 30)
Geneva town 18 5 (3 - 9) 25 (18 - 33)
Gorham town 16 12 (8 - 17) 35 (28 - 42)
Hopewell town 7 8 (4 - 14) 28 (19 - 37)
Manchester town 35 11 (8 - 16) 38 (32 - 43)
Naples town 36 26 (21 - 31) 62 (57 - 68)
Phelps town 49 13 (10 - 16) 45 (39 - 50)
Richmond town 13 7 (3 - 10) 29 (22 - 38)
Seneca town 12 8 (4 - 12) 33 (24 - 44)
South Bristol town 13 18 (11 - 25) 52 (43 - 61)
Victor town 34 6 (4 - 9) 28 (23 - 35)
West Bloomfield town 13 8 (5 - 13) 34 (24 - 42)
Blooming Grove town 79 7 (5 - 9) 28 (23 - 31)
           
Ontario county 411 9   33  

* Long-term measurement, 90 days to one year.

**Short-term measurement, typically 2 to 7 days.

# Uncertainty range of one sigma corresponds to a 68% confidence interval.


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New York State Department of Health - Wadsworth Center

Revised: June 2001