Pullman, WA Radon Mitigation and Testing

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

Based on 1 user-submitted tests, the average radon level is 4.00 pCi/L.

Q: What EPA Radon Zone is Pullman in?

Pullman is in Whitman County, EPA Zone 2.

Q: How much does radon mitigation cost in Pullman?

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

Avg: 4.00 pCi/L

Whitman County

EPA Zone 2

1 user test

Home to Washington State University in Whitman County, Pullman sits atop the Palouse Hills where wind-deposited loess soils overlay Columbia River basalt. Testing data shows an average radon level of 4.0 pCi/L, which meets the EPA action threshold and warrants ongoing attention from homeowners. The unique geology of zip codes 99163 and 99165, combined with the area's mix of student housing and permanent residences, makes individual testing particularly important.

4.00

pCi/L average

Above EPA Action Level

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

4.0 EPA

10+

Pullman, WA Radon Mitigation

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

Pullman, WA Radon Testing

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

Pullman, Washington Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
4 pCi/L	Pullman, WA	21-50 Years	Partial Basement	May 2024

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

Pullman Radon Facts

Key details about the radon risk profile for Pullman and the 99163 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Whitman County, WA

Zip Code

99163

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

4.00 pCi/L

User Tests Submitted

Pullman and the 99163 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 Pullman, WA

What is the average radon level in Pullman, WA?

Based on 1 user-submitted test, the average radon level in Pullman is 4.00 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 Pullman in?

Pullman and the 99163 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 Pullman?

Radon mitigation in Pullman 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 Pullman?

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