Colton, WA Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 6.00 pCi/L.

Q: What EPA Radon Zone is Colton in?

Colton is in Whitman County, EPA Zone 2.

Q: How much does radon mitigation cost in Colton?

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

Whitman County

EPA Zone 2

1 user test

Positioned in the rolling Palouse hills of Whitman County, Colton sits on deep loess deposits over Columbia River basalt, creating moderate radon potential. Testing data shows an average reading of 6.0 pCi/L, which exceeds the EPA action level and reflects the area's geological complexity. The 99113 zip code's agricultural setting includes scattered residential properties where basements and crawl spaces can accumulate radon gas from underlying formations.

6.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Colton, WA Radon Mitigation

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

Colton, WA Radon Testing

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

Colton, Washington Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
6 pCi/L	Colton, WA	21-50 Years	Full Basement	Dec 2018

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

Colton Radon Facts

Key details about the radon risk profile for Colton and the 99113 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Whitman County, WA

Zip Code

99113

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

6.00 pCi/L

User Tests Submitted

Colton and the 99113 zip code are located in Whitman County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Colton, WA

What is the average radon level in Colton, WA?

Based on 1 user-submitted test, the average radon level in Colton 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 Colton in?

Colton and the 99113 zip code are in Whitman County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in Colton?

Radon mitigation in Colton 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 Colton?

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