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Port Orchard, WA Radon Levels

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


Port Orchard, WA Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)
County Kitsap County, WA
Zip Code 98366
Avg. User Level 5.00 pCi/L
User Tests 1

Serving as the county seat of Kitsap County in the Bremerton Metro area, Port Orchard shows an average radon level of 5.0 pCi/L that exceeds EPA action guidelines. The city's location on the Kitsap Peninsula, with its complex glacial deposits over marine sedimentary bedrock, creates conditions that can concentrate radon gas in enclosed spaces. Homeowners in both the 98366 and 98367 zip codes should prioritize radon testing and consider mitigation systems where elevated levels are confirmed.

5.00
pCi/L average
Above EPA Action Level

Based on 1 user-submitted radon test for homes in Port Orchard, WA. The EPA recommends taking action at or above 4.0 pCi/L.

0
4.0 EPA
10+

Port Orchard, WA Radon Mitigation

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

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Port Orchard, WA Radon Levels

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

Radon LevelCityHome AgeFoundation
5 pCi/L Port Orchard, WA 21-50 Years No Basement/All Slab

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

Radon FAQ for Port Orchard, WA

What is the average radon level in Port Orchard, WA?
Based on 1 user-submitted test, the average radon level in Port Orchard is 5.00 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 Port Orchard in?
Port Orchard and the 98366 zip code are in Kitsap 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 Port Orchard?
Radon mitigation in Port Orchard 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 Port Orchard?
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 in Washington with the most user-submitted radon test data, ranked by number of submissions.

CityAvg User Radon LevelSubmissions
Vancouver 6.56 pCi/L 9
Kent 3.50 pCi/L 6
Olympia 7.00 pCi/L 5
Seattle 5.25 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