What is EPA's Action Level for Radon and What Does it Mean?
Nov 12, 2025 · Radon is found in outdoor air and in the indoor air of buildings of all kinds. The EPA recommends homes be fixed if the radon level is 4 pCi/L (picocuries per liter) (150 …
Radon | US EPA
Nov 13, 2025 · Radon is a naturally occurring radioactive gas that can cause lung cancer. You can’t see or smell radon. Testing is the only way to know your level of exposure. Radon can …
Health Risk of Radon - US EPA
Nov 19, 2025 · Exposure to Radon can cause lung cancer in both non-smokers and smokers. Learn more about Radon risks and read studies on the health effects of radon exposure.
If your test results indicate an elevated radon level, radon-resistant techniques can be inexpensively included as part of the renovation. Major renovations can change the level of …
Explain Working Levels (WL) and Picocuries Per Liter of Air (pCi/L).
Oct 14, 2025 · Radon test results may be reported in three different measures – picocuries (pCi/l), Working Levels (WL) and bequerels (bq). If your test result is in pCi/L, EPA recommends you …
EPA Map of Radon Zones and Supplemental Information
Dec 8, 2025 · Find local information related to radon, including your state radon program, with contact information, EPA Regional contacts and a state-specific map.
Radon in Homes, Schools and Buildings - US EPA
Mar 13, 2025 · This webpage provides information about radon and shares answers to frequently asked radon questions, including what you can do about high radon levels in your home.
Radon is estimated to cause many thousands of deaths each year. That’s because when you breathe air containing radon, you can get lung cancer. In fact, the Surgeon General has …
How often should I test/retest my home for radon? | US EPA
Oct 14, 2025 · How often should I test/retest my home for radon? Our general guidance from A Citizen's Guide to Radon - (December 2016, EPA 402/K12/002) - suggests: If your living …
Radon Frequently Asked Questions - US EPA
Aug 15, 2025 · What did the National Academy of Sciences have to say about radon? Does the 2009 World Health Organization's recommendation of a lower radon action level affect the …