Kennewick, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Kennewick in?

Kennewick is in Benton County, EPA Zone 2.

Q: How much does radon mitigation cost in Kennewick?

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

Benton County

EPA Zone 2

Positioned in Benton County as the heart of the Kennewick Metro area, this Columbia River valley community sits over basalt bedrock and alluvial deposits that can influence radon levels. Testing data for zip code 99336 remains limited, though the area's volcanic geology and typical ranch-style construction with concrete slab foundations may reduce radon risk compared to basement-heavy regions. Nevertheless, homeowners should conduct testing as radon can still accumulate in enclosed spaces and crawl areas.

Kennewick, WA Radon Mitigation

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

Kennewick, WA Radon Testing

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

Kennewick Radon Facts

Key details about the radon risk profile for Kennewick and the 99336 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Benton County, WA

Zip Code

99336

Predicted Screening Level

2–4 pCi/L (Zone 2)

Kennewick and the 99336 zip code are located in Benton 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 Kennewick, WA

What EPA Radon Zone is Kennewick in?

Kennewick and the 99336 zip code are in Benton 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 Kennewick?

Radon mitigation in Kennewick 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 Kennewick?

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