Western Connecticut Planning Region, CT radon potential

Western Connecticut Planning Region falls outside what EPA's 1993 radon zone map can rate directly, because its boundaries were redrawn after the map was made — the coverage gaps guide explains exactly which counties this affects and why.

Where Western Connecticut Planning Region sits nationally

Western Connecticut Planning Region, Connecticut is home to about 637,013 people across 532.148 square miles. That works out to roughly 1,197 people per square mile.

Zone vs. an actual test

Without a zone rating for Western Connecticut Planning Region to compare, the two national reference points still apply: EPA's action level is 4 pCi/L, against a national indoor average around 1.3 pCi/L and outdoor air near 0.4 pCi/L. 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 Western Connecticut Planning Region

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Connecticut's state radon program

For Western Connecticut Planning Region, an ongoing number beats a one-time test - a Airthings radon monitor tracks Western Connecticut Planning Region's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. RADONZONE-10OFF at checkout knocks 10% off.

Where Western Connecticut Planning Region's figures come from

Western 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.