Spencer, ID Radon Mitigation and Testing

Q: What EPA Radon Zone is Spencer in?

Spencer is in Clark County, EPA Zone 1.

Q: How much does radon mitigation cost in Spencer?

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

Clark County

EPA Zone 1

Situated in Clark County in southeastern Idaho's high desert region, Spencer sits atop volcanic and sedimentary formations that can produce variable radon concentrations despite the area's remote location. Testing data for this small railroad community remains limited, making individual property assessment essential for the few year-round residents. The area's sparse housing stock includes historic railroad worker homes and rural residential properties, many with basement foundations that could concentrate radon if present in the local geology.

Spencer, ID Radon Mitigation

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

Spencer, ID Radon Testing

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

Spencer Radon Facts

Key details about the radon risk profile for Spencer and the 83446 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Clark County, ID

Zip Code

83446

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Spencer and the 83446 zip code are located in Clark County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Spencer, ID

What EPA Radon Zone is Spencer in?

Spencer and the 83446 zip code are in Clark County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Spencer?

Radon mitigation in Spencer 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 Spencer?

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