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Kent, WA Radon Levels

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


Kent, WA Radon Facts

EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)
County King County, WA
Zip Code 98030
Avg. User Level 3.50 pCi/L
User Tests 6

Located in King County within the Seattle metropolitan area, Kent has recorded an average radon level of 3.6 pCi/L based on 5 residential tests, placing it within EPA's recommended action range though still warranting homeowner attention. The Green River valley's alluvial soils and proximity to glacial deposits create variable radon conditions across zip code 98030, with individual readings ranging from 1.0 to 8.0 pCi/L. Given this significant variation and the area's diverse housing stock, all Kent residents should test their homes to determine their specific radon exposure risk.

3.50
pCi/L average
Below EPA Action Level

Based on 6 user-submitted radon tests for homes in Kent, WA. The EPA recommends taking action at or above 4.0 pCi/L.

0
4.0 EPA
10+

Kent, WA Radon Mitigation

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

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Kent, WA Radon Levels

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

Radon LevelCityHome AgeFoundation
3 pCi/L Kent, WA 21-50 Years No Basement/All Slab
1 pCi/L Kent, WA Partial Basement
4 pCi/L Kent, WA 21-50 Years Full Basement
8 pCi/L Kent, WA 21-50 Years No Basement/All Crawl Space
4 pCi/L Kent, WA 51-99 Years Full Basement

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

Radon FAQ for Kent, WA

What is the average radon level in Kent, WA?
Based on 6 user-submitted tests, the average radon level in Kent is 3.50 pCi/L. This is below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.
What EPA Radon Zone is Kent in?
Kent and the 98030 zip code are in King 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 Kent?
Radon mitigation in Kent 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 Kent?
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