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Tips & info on maintaining and enjoying your Connecticut home
October 2011
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Connecticut Radon Zones
What do they mean?

The U.S. Environmental Protection Agency (EPA) conducts research to help citizens and lawmakers alike understand the risks of radon. As part of that effort, a full mapping of each county in the United States has been created.

Zone 1 counties have a predicted average indoor radon screening level greater than 4 pCi/L (picocuries per liter)

Zone 2 counties have a predicted average indoor radon screening level between 2 and 4 pCi/L

Zone 3 counties have a predicted average indoor radon screening level less than 2 pCi/L

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 EPA notes the following:

  • All homes should test for radon, regardless of geographic location or zone designation.
  • There are many thousands of individual homes with elevated radon levels in Zone 2 and 3.  Elevated levels can be found in Zone 2 and Zone 3 counties.
  • The map should not be used in lieu of testing during real estate transactions.

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State of Connecticut Resources
State of Connecticut Department of Public Health | Radon

Regional EPA Contacts:
 Dan Burke: | 617-918-1285
Tribal Issues: Ida McDonnell: | 617-918-1653

Some nice green grass
Some nice green grass

From the Editor
Invisible Radon

Radon is invisible. Not only in the air but in the media and in the public consciousness. We field calls on a daily basis because people don't have the information they need to make an informed decision about radon testing.

This month we're featuring a newsletter focused on some basics about radon in the air. Next month we'll follow up with info about radon in water.

— Susan Rubinsky, Editor

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In This ISSUE:

Radon, A Primer
Radon, A Primer

Active Testing Advantages
Active Testing Advantages

The Risks of Radon Exposure
The Risks of Radon Exposure

Coming Next Month

All you need to know about radon and water.

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