In fact, most of Ohio falls under Radon Zone 1, the EPA highest-risk zone. In some areas, such as Licking County and Knox County, nearly 75% of all homes have elevated levels of radon. According to the Ohio Department of Health, half of Ohio homes have levels above the EPA’s recommended action level. Ohio is one of the states with the highest levels of radon in the country. Reducing levels to sub-4.0 p/Ci would cut yearly cancer deaths from radon in half.ĭon’t know the level of radon in your home or workplace? Contact us and request more information on professional radon testing. EPA estimates that two-thirds of all homes in the US exceed the recommended action level. In the United States, the Environmental Protection Agency (EPA) action level of 4 pCi/L is the standard, a little higher than that of the WHO. Homes or structures measuring higher are advised to take remedial action to lower that number. The World Health Organization’s general action level is 2.7 pCi/L. As a rule, the lower the number, the lower the health risks. Acceptable indoor radon levels vary by country.The average global outdoor radon level varies between 0.135-0.405 pCi/L.Radon is a naturally-occurring radioactive gas that is found everywhere. The ideal number of radon measurement would be zero but, unfortunately, this level is nonexistent. The World Health Organization (WHO) and most other countries measure the levels of radon in becquerels. The pCi unit is used in the United States because of federal law requirements. We measure the concentration of radon in the air in units of picocuries per litre (pCi/L) or becquerels per cubic meter (Bq/m 3).
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