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Vancouver, WA Radon Levels

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


Vancouver, WA Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)
County Clark County, WA
Zip Code 98660
Avg. User Level 6.60 pCi/L
User Tests 9

Positioned across the Columbia River from Portland in Clark County, Vancouver (98660) sits on river terrace deposits and volcanic soils that contribute to the Pacific Northwest's variable radon landscape. Local testing reveals an average radon level of 6.56 pCi/L, significantly exceeding the EPA's 4.0 pCi/L action threshold and requiring immediate attention from homeowners. The area's mix of mid-century suburban homes and newer developments, many with full basements, creates optimal conditions for radon accumulation.

6.60
pCi/L average
Above EPA Action Level

Based on 9 user-submitted radon tests for homes in Vancouver, WA. The EPA recommends taking action at or above 4.0 pCi/L.

0
4.0 EPA
10+

Vancouver, WA Radon Mitigation

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

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Vancouver, WA Radon Levels

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

Radon LevelCityHome AgeFoundation
4 pCi/L Vancouver, WA 21-50 Years Partial Basement
8 pCi/L Vancouver, WA 21-50 Years Full Basement
16 pCi/L Vancouver, WA 21-50 Years Full Basement
4 pCi/L Vancouver, WA 51-99 Years Full Basement
7 pCi/L Vancouver, WA 21-50 Years No Basement/All Crawl Space

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

Radon FAQ for Vancouver, WA

What is the average radon level in Vancouver, WA?
Based on 9 user-submitted tests, the average radon level in Vancouver is 6.60 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 Vancouver in?
Vancouver and the 98660 zip code are in Clark County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.
How much does radon mitigation cost in Vancouver?
Radon mitigation in Vancouver 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 Vancouver?
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