Clovis, CA Radon Levels

Q: What EPA Radon Zone is Clovis in?

Clovis is in Fresno County, EPA Zone 2.

Q: How much does radon mitigation cost in Clovis?

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

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

Clovis, CA Radon Facts

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

County Fresno County, CA

Zip Code 93611

Situated in Fresno County as part of the Central Valley's Fresno Metro area, Clovis sits atop alluvial deposits and valley sediments that generally produce lower radon concentrations. Testing data across the city's multiple zip codes (93611, 93612, 93619) remains limited, encouraging homeowners to conduct professional radon testing for peace of mind. The community's suburban growth includes diverse foundation types from older homes to modern slab-on-grade construction that can influence radon entry patterns.

Clovis, CA 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 Clovis, CA

What EPA Radon Zone is Clovis in?

Clovis and the 93611 zip code are in Fresno 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 Clovis?

Radon mitigation in Clovis 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 Clovis?

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 California

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

City	Avg User Radon Level	Submissions
Los Angeles	7.83 pCi/L	6
Mammoth Lakes	10.80 pCi/L	5
San Jose	4.20 pCi/L	5
Rancho Palos Verdes	8.00 pCi/L	4
Bishop	6.25 pCi/L	4
Oakland	5.00 pCi/L	4
Woodland Hills	7.67 pCi/L	3
South Lake Tahoe	6.33 pCi/L	3
Palos Verdes Peninsula	6.00 pCi/L	3
Sacramento	4.33 pCi/L	3