Castleford, ID Radon Mitigation and Testing

Q: What EPA Radon Zone is Castleford in?

Castleford is in Twin Falls County, EPA Zone 2.

Q: How much does radon mitigation cost in Castleford?

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

Twin Falls County

EPA Zone 2

Found in Twin Falls County in southern Idaho's Snake River Plain, Castleford sits atop basaltic bedrock and volcanic deposits that can produce variable radon levels depending on soil conditions. The rural community's housing reflects typical Idaho agricultural area construction, with many homes featuring full basements or crawl spaces. With no current testing data for zip code 83321, homeowners should conduct individual radon testing to determine their specific risk.

Castleford, ID Radon Mitigation

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

Castleford, ID Radon Testing

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

Castleford Radon Facts

Key details about the radon risk profile for Castleford and the 83321 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Twin Falls County, ID

Zip Code

83321

Predicted Screening Level

2–4 pCi/L (Zone 2)

Castleford and the 83321 zip code are located in Twin Falls 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 Castleford, ID

What EPA Radon Zone is Castleford in?

Castleford and the 83321 zip code are in Twin Falls 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 Castleford?

Radon mitigation in Castleford 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 Castleford?

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