North Bend, WA Radon Mitigation and Testing

Q: What is the average radon level in North Bend, WA?

Based on 2 user-submitted tests, the average radon level is 18.00 pCi/L.

Q: What EPA Radon Zone is North Bend in?

North Bend is in King County, EPA Zone 3.

Q: How much does radon mitigation cost in North Bend?

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

Avg: 18.00 pCi/L

King County

EPA Zone 3

2 user tests

Nestled in the Cascade foothills of King County within the Seattle Metro area, this mountain community lacks specific radon testing data for zip code 98045. The area's volcanic and glacial geology, combined with varied foundation types in mountain homes, can create unpredictable radon conditions. Individual testing becomes especially important given the diverse geological landscape.

18.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

North Bend, WA Radon Mitigation

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

North Bend, WA Radon Testing

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

North Bend, Washington Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
18 pCi/L	North Bend, WA	51-99 Years	Full Basement	Feb 2026

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

North Bend Radon Facts

Key details about the radon risk profile for North Bend and the 98045 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

King County, WA

Zip Code

98045

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Avg. User Submitted Level

18.00 pCi/L

User Tests Submitted

North Bend and the 98045 zip code are located in King 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 North Bend, WA

What is the average radon level in North Bend, WA?

Based on 2 user-submitted tests, the average radon level in North Bend is 18.00 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 North Bend in?

North Bend and the 98045 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 North Bend?

Radon mitigation in North Bend 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 North Bend?

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.

City	Avg User Radon Level	Submissions
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