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What is Radon?

Radon is generated naturally from the decay of uranium found in nearly all soils. It typically moves through the ground to the air above. Radon is able to enter homes and other buildings through cracks and other openings in the foundation. Since radon is a colorless and odorless gas, most individuals are not aware that a potential health hazard exists. Radon is measured in picocuries per liter (pCi/L) and the EPA has identified 4 pCi/L as a recommended action level.

According to the Surgeon General, radon is the second leading cause of lung cancer in the United States and the leading cause of lung cancer among non-smokers. Americans are urged to test their homes for radon and to remedy high radon concentrations in homes as soon as possible.

Seneca County has been designated as a Zone 1 area on the Ohio EPA’s map of Radon Zones. Zone 1 areas have a predicted average indoor screening level greater than 4.0 pCi/L.

Radon test kits are available on-line and also at various stores in our area – generally for $20 or less.


Office Location
Environmental Health Division
92 E. Perry Street
Tiffin, OH 44883

Monday - Friday
8:00 AM - 4:30 PM

(419) 447-3691 ext. 6321