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Indiana Radon Map
Zone 1: Highest Potential (greater than 4 pci/L)
Zone 2: Moderate Potential (from 2 to 4 pci/L)
Zone 3: Low Potential (less than 2 pci/L)
The U.S. EPA and the U.S. Geological Survey have evaluated the radon potential in the U.S. and have developed this map to assist National, State, and local organizations to target their resources and to assist building code officials in deciding whether radon-resistant features are applicable in new construction. This map is not intended to be used to determine if a home in a given zone should be tested for radon. Homes with elevated levels of radon have been found in all three zones. All homes should be tested regardless of geographic location. The map assigns each of the 3,141 counties in the U.S. to one of three zones based on radon potential. Each zone designation reflects the average short-term radon measurement that can be expected to be measured in a building without the implementation of radon control methods. The radon zone designation of the highest priority is Zone 1.
Health Effects of Radon
(Information provided by the Midwest Universities Radon Consortium, U.S. EPA Regional Radon Training Center)
Opinion vs. Science:
The public ranks radon as the 29th largest environmental health risk. However, the scientific community ranks radon the number one biggest risk (tied with worker chemical exposure).
The EPA recommends that ALL homes should be retested EVERY 5 years, and that homes with a radon mitigation system installed should be retested EVERY 2 years. Retesting should also occur whenever major renovations are made to the home.
The following organizations have stated that "Radon is a Serious National Health Problem"...
- American Lung Association
- American Medical Association
- Environmental Protection Agency
- National Academy of Sciences
- National Council on Radiation Protection and Measurement
- U.S. Surgeon General
- World Health Organization