Winchester, ID Radon Mitigation and Testing

Q: What EPA Radon Zone is Winchester in?

Winchester is in Lewis County, EPA Zone 3.

Q: How much does radon mitigation cost in Winchester?

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

Lewis County

EPA Zone 3

Located in Lewis County in north-central Idaho, Winchester sits in the Clearwater River valley where volcanic soils and basalt bedrock create varied radon conditions. While comprehensive radon testing data is currently limited for this rural community, homeowners should conduct testing given Idaho's diverse geological conditions. Properties in zip code 83555 may experience different radon levels depending on local soil composition and home foundation types.

Winchester, ID Radon Mitigation

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

Winchester, ID Radon Testing

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

Winchester Radon Facts

Key details about the radon risk profile for Winchester and the 83555 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Lewis County, ID

Zip Code

83555

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Winchester and the 83555 zip code are located in Lewis 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 Winchester, ID

What EPA Radon Zone is Winchester in?

Winchester and the 83555 zip code are in Lewis 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 Winchester?

Radon mitigation in Winchester 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 Winchester?

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