What EPA's radon map says about Naugatuck Valley Planning Region

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

Naugatuck Valley Planning Region by the numbers

About 462,220 people live in Naugatuck Valley Planning Region, Connecticut, spread over 412.784 square miles. Averaged across its land area, Naugatuck Valley Planning Region runs about 1,120 people per square mile.

Why the zone isn't the answer by itself

EPA's 4 pCi/L action level and the roughly 1.3 pCi/L national indoor average apply to Naugatuck Valley 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.

Next steps for a home in Naugatuck Valley Planning Region

Mitigation cost doesn't depend on Naugatuck Valley Planning Region's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Connecticut's state radon program

Naugatuck Valley Planning Region's test kit answers today; a Airthings radon monitor keeps answering for Naugatuck Valley 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

Naugatuck Valley 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.