Trail City, SD Radon Mitigation and Testing

Q: What EPA Radon Zone is Trail City in?

Trail City is in Dewey County, EPA Zone 2.

Q: How much does radon mitigation cost in Trail City?

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

Dewey County

EPA Zone 2

Positioned along the Missouri River in Dewey County, Trail City sits within EPA Zone 2 where Pierre Shale formations and river valley sediments create moderate radon potential across the northern Great Plains. Testing data for zip code 57657 is currently limited, making individual property assessment important for this rural community. South Dakota's variable geology means radon levels can differ significantly between neighboring properties.

Trail City, SD Radon Mitigation

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

Trail City, SD Radon Testing

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

Trail City Radon Facts

Key details about the radon risk profile for Trail City and the 57657 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Dewey County, SD

Zip Code

57657

Predicted Screening Level

2–4 pCi/L (Zone 2)

Trail City and the 57657 zip code are located in Dewey 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 Trail City, SD

What EPA Radon Zone is Trail City in?

Trail City and the 57657 zip code are in Dewey 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 Trail City?

Radon mitigation in Trail City 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 Trail City?

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 South Dakota

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

City	Avg User Radon Level	Submissions
Spearfish	7.75 pCi/L	4
Rapid City	10.50 pCi/L	2
Aberdeen	8.50 pCi/L	2
Sioux Falls	6.00 pCi/L	2
Watertown	6.00 pCi/L	2