Richland, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Richland in?

Richland is in Benton County, EPA Zone 2.

Q: How much does radon mitigation cost in Richland?

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

Richland in Benton County serves as part of the Kennewick Metro area, situated along the Columbia River where basalt formations and alluvial deposits create variable radon conditions. Testing data for zip code 99352 is currently limited, making individual home testing important for residents. Washington's complex geology means radon levels can differ significantly across neighborhoods, particularly in areas with different foundation types.

Richland, WA Radon Mitigation

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

Richland, WA Radon Testing

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

Richland Radon Facts

Key details about the radon risk profile for Richland and the 99352 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Benton County, WA

Zip Code

99352

Predicted Screening Level

2–4 pCi/L (Zone 2)

Richland and the 99352 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 Richland, WA

What EPA Radon Zone is Richland in?

Richland and the 99352 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 Richland?

Radon mitigation in Richland 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 Richland?

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