Is South Central Connecticut Planning Region, CT a radon risk area?

EPA's Map of Radon Zones does not carry a rating for South Central Connecticut Planning Region under its current boundaries — the map dates to 1993 and this county's borders have changed since (see the coverage gaps guide).

How South Central Connecticut Planning Region compares

About 576,718 people live in South Central Connecticut Planning Region, Connecticut, spread over 367.252 square miles. Averaged across its land area, South Central Connecticut Planning Region runs about 1,570 people per square mile.

What this actually means for a house in South Central Connecticut Planning Region

EPA's 4 pCi/L action level and the roughly 1.3 pCi/L national indoor average apply to South Central Connecticut Planning Region the same as anywhere, even without a zone rating to place it against. EPA's guidance is unchanged by the absence of a zone rating here: test every home, since a zone (where one exists) only describes a county-wide average, never an individual house.

If South Central Connecticut Planning Region tests above the action level

Nothing about South Central Connecticut Planning Region's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Connecticut's state radon program

South Central Connecticut Planning Region's test kit answers today; a Airthings radon monitor keeps answering for South Central Connecticut Planning Region over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

More on how this number was built

South Central Connecticut Planning Region's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. See the coverage gaps guide for the full list of boundary changes EPA's map predates.