Is Baker County, OR a radon risk area?

EPA places Baker 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 44th percentile for radon potential — Baker County outranks 44% of every county EPA has rated.

How Baker County compares

About 16,750 people live in Baker County, Oregon, spread over 3,067.967 square miles. Averaged across its land area, Baker County runs about 5 people per square mile. Rank 680 by population within its EPA zone puts Baker County at the 34th percentile among zone peers. Baker County falls in EPA Radon Region 10, one of 142 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Baker County

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Baker County's Zone 2 prediction lands in the gap between the two. Baker County's Zone 2 rating sits in the middle nationally; EPA's guidance is unchanged by that — test every home regardless of its zone.

Testing and mitigation in Baker County

Nothing about Baker County'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 Oregon's state radon program

Baker County's test kit answers today; a Airthings radon monitor keeps answering for Baker County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Baker County's numbers. Whatever zone Baker County carries, the zone explainer covers what it does and doesn't tell you about any one house.