Sunnyside, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Sunnyside in?

Sunnyside is in Yakima County, EPA Zone 2.

Q: How much does radon mitigation cost in Sunnyside?

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

Yakima County

EPA Zone 2

Located in the Yakima Valley of Yakima County within the Kennewick Metro area, Sunnyside currently lacks comprehensive radon testing data for zip code 98944. The community's position in Washington's agricultural heartland, with Columbia River basalt underlying valley sediments, creates generally moderate radon conditions. Testing remains important given the area's mix of agricultural and residential properties with varied foundation types.

Sunnyside, WA Radon Mitigation

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

Sunnyside, WA Radon Testing

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

Sunnyside Radon Facts

Key details about the radon risk profile for Sunnyside and the 98944 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Yakima County, WA

Zip Code

98944

Predicted Screening Level

2–4 pCi/L (Zone 2)

Sunnyside and the 98944 zip code are located in Yakima 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 Sunnyside, WA

What EPA Radon Zone is Sunnyside in?

Sunnyside and the 98944 zip code are in Yakima 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 Sunnyside?

Radon mitigation in Sunnyside 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 Sunnyside?

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