Inverness, CA Radon Mitigation and Testing

Q: What is the average radon level in Inverness, CA?

Based on 2 user-submitted tests, the average radon level is 4.00 pCi/L.

Q: What EPA Radon Zone is Inverness in?

Inverness is in Marin County, EPA Zone 3.

Q: How much does radon mitigation cost in Inverness?

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

Avg: 4.00 pCi/L

Marin County

EPA Zone 3

2 user tests

Inverness is located in Marin County, California. With 2 user-submitted readings averaging 4.00 pCi/L, the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 94937 zip code.

4.00

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Inverness, CA. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Inverness, CA Radon Mitigation

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

Inverness, CA Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Inverness, California Radon Levels

User-submitted radon test readings from homes in the Inverness area.

Radon Level	City	Home Age	Foundation	Submitted
2 pCi/L	Inverness, CA	0-20 Years	Full Basement	Dec 2019
6 pCi/L	Inverness, CA	51-99 Years	Partial Basement	Oct 2019

Have a radon test result for Inverness? Submit your reading to help other homeowners.

Inverness Radon Facts

Key details about the radon risk profile for Inverness and the 94937 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Marin County, CA

Zip Code

94937

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Avg. User Submitted Level

4.00 pCi/L

User Tests Submitted

Inverness and the 94937 zip code are located in Marin County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Inverness, CA

What is the average radon level in Inverness, CA?

Based on 2 user-submitted tests, the average radon level in Inverness is 4.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Inverness in?

Inverness and the 94937 zip code are in Marin County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Inverness?

Radon mitigation in Inverness 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 Inverness?

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 with the most user-submitted radon test data in the state.

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
Woodland Hills	7.67 pCi/L	3
South Lake Tahoe	6.33 pCi/L	3
Palos Verdes Peninsula	6.00 pCi/L	3
Bishop	5.67 pCi/L	3
Sacramento	4.33 pCi/L	3
Oakland	3.33 pCi/L	3
Fresno	10.00 pCi/L	2
Davis	8.00 pCi/L	2
Palo Alto	6.50 pCi/L	2
Studio City	6.50 pCi/L	2
Menlo Park	5.00 pCi/L	2
Truckee	5.00 pCi/L	2
Walnut Creek	4.00 pCi/L	2
San Diego	3.50 pCi/L	2
San Francisco	3.50 pCi/L	2
Belmont	20.00 pCi/L	1