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Ohio Radon Zone Information : Ohio County Radon Breakdown

ohio zone 1 radon map
Ohio Radon Zone 1 : Highest Radon Potential
  • Highest Potential : Indoor radon levels greater than 4pCi/L
  • Moderate Potential : Indoor radon levels between 2pCi/L and 4pCi/L
  • Lowest Potential : Indoor radon levels less than 2pCi/L
  • Zone 1 Counties : Adams, Allen, Ashland, Auglaize, Belmont, Butler, Carroll, Champaign, Clark, Clinton, Columbiana, Coshocton, Crawford, Darke, Delaware, Fairfield, Fayette, Franklin, Greene, Guernsey, Hamilton, Hancock, Hardin, Harrison, Holmes, Huron, jefferson, Knox, Licking, Logan, Madison, Marion, Mercer, Miami, Montgomery, Morrow, Muskingum, Perry, Pickaway, Pike, Preble, Richland, Ross, Seneca, Shelby, Stark, Summit, Tuscarawas, Union, Van Wert, Warren, Wayne, Wyandot
ohio zone 2 radon map
Ohio Radon Zone 2 : Moderate Radon Potential
  • Highest Potential : Indoor radon levels greater than 4pCi/L
  • Moderate Potential : Indoor radon levels between 2pCi/L and 4pCi/L
  • Lowest Potential : Indoor radon levels less than 2pCi/L
  • Zone 2 Counties : Ashtabula, Athens, Brown, Clermont, Cuyahoga, Defiance, Erie, Fulton, Gallia, Geauga, Henry, Hocking, Jackson, Lake, Lawrence, Lorain, Lucas, Mahoning, Medina, Meigs, Monroe, Morgan, Noble, Ottawa, Paulding, Portage, Putnam, Sandusky, Scioto, Trumbull, Vinton, Washington, Williams, Wood
ohio zone 3 radon map
Ohio Radon Zone 3 : Lowest Radon Potential
  • Highest Potential : Indoor radon levels greater than 4pCi/L
  • Moderate Potential : Indoor radon levels between 2pCi/L and 4pCi/L
  • Lowest Potential : Indoor radon levels less than 2pCi/L
  • Zone 3 Counties : No Counties
ohio radon test kits
Ohio Radon Test Kits

Despite what zone you fall under testing your home is the only way to make sure that you are safe from radon. Testing your home for radon gas is very easy and most of the time you can get test kits at very reasonable rates with quick turn around time on your test results. We highly suggest that everyone test on a yearly basis and in some areas depending on your geological soil make you may benefit more from an actual radon monitor.

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Get a quote from a qualified radon specialist

If you have tested your home already and you need to speak to a qualified radon specialist fill out our free no obligation price quote now to find out about a radon mitigation system installation in Ohio. SWAT Environmental is the largest radon mitigation company in Ohio and we are here to serve you.

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What you should know about radon in Ohio

ohio radon map info

Ohio Radon Levels

The state of Ohio has moderate to high estimated indoor radon levels starting at roughly 2 pCi/L and going above the 4 pCi/L. The northern most counties and the southern most counties that border the state are estimated at having the moderate or zone 2 indoor levels leaving the rest of the state in the higher or zone 1 radon levels. More than half the state has estimated levels above that of any safe standards and it is very important that you have your home or business tested to find out what your indoor radon levels are. Every location is different and radon levels can fluctuate for several reasons, so the best way to know for sure what your levels are is to test and fight the dangers of radon gas.

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Ohio Radon Gas?

Radon is a gas that is produced by the breakdown of uranium in the soil. Radon can't be seen, smelled, or tasted and has been proven to cause cancer due to exposure over a long period of time. Radon is an invisible and invasive gas that penetrates your homes slab, crawlspace, or basement areas through cracks and imperfections in your homes structure. Radon is all around us even in the outdoor air, but when it can collect in your home it can be dangerous.

*the map above is not 100% accurate as there are many factors for what radon levels actually are in every area, This map should only be used as a reference to the areas and what the areas average indoor radon levels may be. No matter what your radon level can only be determined by an actual radon test administered by or ordered from a professional radon testing facility.