Newton County, MO radon potential

EPA places Newton 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. Nationally that's the 56th percentile for radon potential — Newton County outranks 56% of every county EPA has rated.

Newton County by the numbers

Newton County, Missouri is home to about 61,519 people across 624.753 square miles. Averaged across its land area, Newton County runs about 98 people per square mile. Within its own EPA zone, Newton County is bigger by population than 71% of the counties that share it. EPA's geology-based Region 7 groups Newton County with 411 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Newton 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. Middle-of-the-pack doesn't mean risk-free for any one Newton County address — a moderate county average still leaves individual homes to test either side of it.

Testing and mitigation in Newton 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 Missouri's state radon program

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

Where Newton County's figures come from

Newton County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.