Sagadahoc County, ME radon potential

EPA places Sagadahoc County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Rank it against the rest of the country and Sagadahoc County lands in the 53rd percentile for radon potential.

Where Sagadahoc County sits nationally

Sagadahoc County, Maine is home to about 37,582 people across 253.979 square miles. Population density there runs about 148 people per square mile. Within its own EPA zone, Sagadahoc County is bigger by population than 59% of the counties that share it. EPA's geology-based Region 1 groups Sagadahoc County with 58 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Sagadahoc County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. Sagadahoc County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Next steps for a home in Sagadahoc County

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 Maine's state radon program

For Sagadahoc County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Sagadahoc County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

Where Sagadahoc County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Sagadahoc County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.