AARST_Radon_Reporter_Q32025_Single

THE RADON REPORTER | 29 DATA The US Centers for Disease Control and Prevention’s National Environmental Public Health Tracking (EPHT) Program was established in 2002 in response to a call for a national network to monitor the impact of environmental factors on public health. The radon element of EPHT was first developed through a collaboration between several states interested in contributing data and staff from EPA’s Indoor Environments Division and CDC EPHT. Cumulatively, 22 states have sent radon test data to EPHT, including nine that regulate measurement. To supplement the state-provided data, in collaboration with the Colorado Department of Public Health and the Environment, six radon laboratories contributed more than two million test results for 2005-2017. In addition to the Maximum Pre-Mitigation Radon Level indicator presented on the previous page, the available measures for radon include Percentage of Pre-mitigation Radon Tests by Radon Level (which is used by the Radon Report Card), Number of Pre-mitigation Radon Tests by Radon Level, Number of Buildings Tested, and Rate of Units Tested per 100,000 Housing Units. Summary data down to the county level for each year are available for download in chart, table and map formats; the default view is the map. Additional states and labs have been interested in providing additional radon data to EPHT. New and supplemental data submissions, as well as improvements to the data dictionaries that define the radon variables, have been under discussion with EPHT. In March 2025, CDC placed EPHT staff on administrative leave and posted on the Data Explorer website: “This website is no longer being maintained, and no new data will be added.” As of August 2025, EPHT staff have been reinstated, and hopefully discussion of envisioned enhancements will soon resume.