John Day, OR Radon Levels

Q: What EPA Radon Zone is John Day in?

John Day is in Grant County, EPA Zone 2.

Q: How much does radon mitigation cost in John Day?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Check local John Day radon levels and find certified testing and mitigation professionals to keep your home safe

John Day, OR Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Grant County, OR

Zip Code 97845

Eastern Oregon community John Day lies in Grant County within the Blue Mountains region, where volcanic and sedimentary geology creates moderate radon potential across the area. With no current testing data available for zip code 97845, residents should consider professional radon evaluation. The region's complex geological structure, featuring Tertiary volcanic rocks and Paleozoic sediments, can produce localized conditions where radon levels vary significantly based on bedrock composition and soil characteristics.

John Day, OR Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

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Radon FAQ for John Day, OR

What EPA Radon Zone is John Day in?

John Day and the 97845 zip code are in Grant County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in John Day?

Radon mitigation in John Day typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in John Day?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

Most Active Radon Markets in Oregon

Cities in Oregon with the most user-submitted radon test data, ranked by number of submissions.

City	Avg User Radon Level	Submissions
Corvallis	5.60 pCi/L	5
Astoria	9.25 pCi/L	4
La Grande	10.67 pCi/L	3
Bend	3.33 pCi/L	3
Salem	9.00 pCi/L	2
Eugene	7.00 pCi/L	2
Medford	7.00 pCi/L	1
Dundee	6.00 pCi/L	1
Ashland	4.00 pCi/L	1
Portland	4.00 pCi/L	1