Hay, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Hay in?

Hay is in Whitman County, EPA Zone 2.

Q: How much does radon mitigation cost in Hay?

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

Whitman County

EPA Zone 2

Rural Whitman County encompasses this small community built on the rolling hills of the Palouse region, where loess soils over basalt bedrock create moderate radon potential. Current testing data for the 99136 zip code is limited, emphasizing the value of individual home testing for residents. The area's sparse housing stock includes both historic farmsteads and newer rural residences, with basement construction less common due to the region's agricultural character.

Hay, WA Radon Mitigation

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

Hay, WA Radon Testing

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

Hay Radon Facts

Key details about the radon risk profile for Hay and the 99136 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Whitman County, WA

Zip Code

99136

Predicted Screening Level

2–4 pCi/L (Zone 2)

Hay and the 99136 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 Hay, WA

What EPA Radon Zone is Hay in?

Hay and the 99136 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 Hay?

Radon mitigation in Hay 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 Hay?

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