Renton, WA Radon Mitigation and Testing

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

Based on 2 user-submitted tests, the average radon level is 6.00 pCi/L.

Q: What EPA Radon Zone is Renton in?

Renton is in King County, EPA Zone 3.

Q: How much does radon mitigation cost in Renton?

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

Avg: 6.00 pCi/L

King County

EPA Zone 3

2 user tests

Located in King County as part of the Seattle Metro area, Renton has recorded an average radon level of 6.0 pCi/L from recent testing data, significantly exceeding the EPA action level. The city's position in the Puget Sound region, with glacial deposits over sedimentary bedrock, creates conditions conducive to radon accumulation in both older and newer homes. Properties throughout Renton's various zip codes should be tested, particularly those with daylight basements and split-level designs popular in this area's post-1960s suburban development.

6.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Renton, WA Radon Mitigation

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

Renton, WA Radon Testing

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

Renton, Washington Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
6 pCi/L	Renton, WA	0-20 Years	Partial Basement	Jun 2024

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

Renton Radon Facts

Key details about the radon risk profile for Renton and the 98055 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

King County, WA

Zip Code

98055

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Avg. User Submitted Level

6.00 pCi/L

User Tests Submitted

Renton and the 98055 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 Renton, WA

What is the average radon level in Renton, WA?

Based on 2 user-submitted tests, the average radon level in Renton is 6.00 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 Renton in?

Renton and the 98055 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 Renton?

Radon mitigation in Renton 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 Renton?

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