Upland, CA Radon Levels

Q: What EPA Radon Zone is Upland in?

Upland is in San Bernardino County, EPA Zone 2.

Q: How much does radon mitigation cost in Upland?

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

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

Upland, CA Radon Facts

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

County San Bernardino County, CA

Zip Code 91784

Located in San Bernardino County within the Riverside Metro area, Upland has minimal radon testing data for the 91784 zip code region. Southern California's Mediterranean climate and diverse geology typically produce lower radon levels than many other areas, though certain geological formations and home characteristics can still influence readings. Residents in this foothill community should consider professional radon testing, particularly those in older homes or properties built on sloped terrain where soil gas entry patterns may vary.

Upland, 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 Upland, CA

What EPA Radon Zone is Upland in?

Upland and the 91784 zip code are in San Bernardino 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 Upland?

Radon mitigation in Upland 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 Upland?

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