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Friday Harbor, WA Radon Mitigation and Testing

San Juan County
EPA Zone 3

Friday Harbor, WA resides in San Juan 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. Testing is recommended for all homes in the 98250 zip code area.

Friday Harbor, WA Radon Mitigation

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

Friday Harbor, WA Radon Testing

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

Friday Harbor Radon Facts

Key details about the radon risk profile for Friday Harbor and the 98250 zip code area.

EPA Radon Zone
Zone 3 — Low Risk
County
San Juan County, WA
Zip Code
98250
Predicted Screening Level
< 2.0 pCi/L (Zone 3)

Friday Harbor and the 98250 zip code are located in San Juan 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 Friday Harbor, WA

What EPA Radon Zone is Friday Harbor in?
Friday Harbor and the 98250 zip code are in San Juan 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 Friday Harbor?
Radon mitigation in Friday Harbor 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 Friday Harbor?
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 Washington

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

CityAvg User Radon LevelSubmissions
Vancouver 6.56 pCi/L 9
Kent 3.60 pCi/L 5
Seattle 5.25 pCi/L 4
Olympia 5.00 pCi/L 4
Bellevue 3.75 pCi/L 4
Spokane 11.67 pCi/L 3
Camas 8.00 pCi/L 3
Centralia 7.00 pCi/L 3
Bellingham 4.50 pCi/L 2
Kirkland 4.50 pCi/L 2
Washougal 8.00 pCi/L 1
Ridgefield 5.00 pCi/L 1
Moses Lake No submissions 0