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Suffolk 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 #
(%)
Babylon town 37 0.8 (0.4 - 1.2) 5 (3 - 7)
Brookhaven town 58 0.7 (0.4 - 1.1) 5 (4 - 7)
East Hampton town 13 1.6 (0.8 - 3.3) 10 (5 - 14)
Huntington town 104 1.8 (1.3 - 2.4) 11 (9 - 14)
Islip town 48 0.7 (0.4 - 1.0) 4 (2 - 5)
Poospatuck Reservation 0 1.5 (0.5 - 4.2) 7 (3 - 13)
Riverhead town 5 1.7 (0.6 - 3.8) 8 (4 - 13)
Shelter Island town 1 2 (1 - 6) 11 (5 - 18)
Shinnecock Reservation 0 1.4 (0.6 - 4.4) 8 (4 - 14)
Smithtown town 43 1.7 (1.1 - 3.0) 10 (7 - 13)
Southampton town 17 0.7 (0.2 - 1.3) 4 (2 - 7)
Southold town 7 2 (1 - 4) 10 (6 - 16)
           
Suffolk county 333 1   6  

* 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