About Radon Data

Overview

This site provides data on indoor air radon testing. Data are presented by county and by year. The table below shows key information about radon testing data:

Data Source Bureau of Environmental Radiation Protection
Time Frame 2000-2019
Geographic Coverage New York State by County
Last Update February 2020
Data Methodology See Technical Notes

Interpreting Data

View New York State by County and Year

Average Number of Radon Tests by County and Year
Users can view the average number of radon tests performed in New York State, by county for a selected five-year period. Data is presented as five-year rolling averages in maps, graphs and tables.

Percentage of Homes tested for Radon by County and Year
Users can view percent of homes in a county that were tested for radon for a selected five-year period in New York State. Number of housing units in a county was obtained from the 2010 U.S. Census Bureau data and used to determine percentages. Data is presented as five-year rolling averages in maps, graphs and tables. Note that this is only the percent of homes tested through the NYS Radon Program. Radon testing through the NYS Radon Program accounts for about 10% of all radon testing performed in NYS.

Average Radon Test values by County and Year
Users can view the average radon test results in New York State, by county for a selected five-year period. Data is presented in pCi/L units as five-year rolling averages in maps, graphs and tables.

Maximum Radon Test values by County and Year
Users can view the maximum radon test results in New York State, by county for a selected five-year period. Data is presented in pCi/L units as five-year rolling averages in maps, graphs and tables.

Percent Tests by Test Results by County and Year
Users can view the percent of tests with results <2 pCi/L, 2 to <4 pCi/L or 4 pCi/L and higher in New York State, by county for a selected five-year period. Data is presented as five-year rolling averages in maps, graphs and tables.

Percent Tests by Floor level tested by County and Year
Users can view the percent of tests by floor level tested (basement, first floor, other floors) in New York State, by county for a selected five-year period. Data is presented as five-year rolling averages in maps, graphs and tables.

View County data by Year

Users can select a county to view a table of multiple years of radon test data metrics for that county. Radon test measures will be displayed as five-year rolling averages and include average number of tests performed, percent of homes tested, average and maximum radon test values in pCi/L, percent tests with results <2 pCi/L, 2 to <4 pCi/L or 4 pCi/L and higher and percent tests by floor level tested.

Technical Notes