Lewiston, ID Radon Mitigation and Testing

Q: What EPA Radon Zone is Lewiston in?

Lewiston is in Nez Perce County, EPA Zone 3.

Q: How much does radon mitigation cost in Lewiston?

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

Nez Perce County

EPA Zone 3

Positioned in Nez Perce County along the Snake River, Lewiston sits in northern Idaho where Columbia River basalt and underlying geology influence radon potential. Current testing data for zip code 83501 is limited, emphasizing the need for individual home radon testing throughout this river valley community. Idaho's diverse geological formations and varying foundation types mean radon levels can differ significantly from home to home.

Lewiston, ID Radon Mitigation

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

Lewiston, ID Radon Testing

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

Lewiston Radon Facts

Key details about the radon risk profile for Lewiston and the 83501 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Nez Perce County, ID

Zip Code

83501

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Lewiston and the 83501 zip code are located in Nez Perce County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Lewiston, ID

What EPA Radon Zone is Lewiston in?

Lewiston and the 83501 zip code are in Nez Perce County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Lewiston?

Radon mitigation in Lewiston 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 Lewiston?

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 Idaho

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Idaho Falls	7.29 pCi/L	7
Hailey	7.83 pCi/L	6
Post Falls	9.00 pCi/L	5
Coeur D Alene	9.00 pCi/L	4
Moscow	7.75 pCi/L	4
Victor	6.67 pCi/L	3
Driggs	16.00 pCi/L	2
Hayden	8.50 pCi/L	2
Pocatello	8.50 pCi/L	2
Eagle	6.00 pCi/L	1
Boise	No submissions	0
Nampa	No submissions	0
Sandpoint	No submissions	0