Harrington, WA Radon Mitigation and Testing

Q: What EPA Radon Zone is Harrington in?

Harrington is in Lincoln County, EPA Zone 2.

Q: How much does radon mitigation cost in Harrington?

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

Lincoln County

EPA Zone 2

Located in Lincoln County within Washington's Palouse region, Harrington sits on wind-blown loess soils over basalt bedrock that generally produce moderate radon levels. The town's housing stock reflects its agricultural heritage, including older farmhouses and more recent residential construction, most built on concrete foundations suitable for the area's soil conditions. Since radon testing data for zip code 99134 remains limited, professional testing is recommended for homeowners seeking to understand their property's radon potential.

Harrington, WA Radon Mitigation

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

Harrington, WA Radon Testing

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

Harrington Radon Facts

Key details about the radon risk profile for Harrington and the 99134 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Lincoln County, WA

Zip Code

99134

Predicted Screening Level

2–4 pCi/L (Zone 2)

Harrington and the 99134 zip code are located in Lincoln 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 Harrington, WA

What EPA Radon Zone is Harrington in?

Harrington and the 99134 zip code are in Lincoln 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 Harrington?

Radon mitigation in Harrington 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 Harrington?

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