Thompson, UT Radon Mitigation and Testing

Q: What EPA Radon Zone is Thompson in?

Thompson is in Grand County, EPA Zone 1.

Q: How much does radon mitigation cost in Thompson?

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

Grand County

EPA Zone 1

Nestled in Grand County near Arches National Park, Thompson represents one of Utah's smaller communities in an area of sandstone formations and desert soils. The high-desert location typically produces lower radon levels, though individual properties can vary significantly based on local geological conditions. Without available testing data for the 84540 zip code area, residents should still consider radon testing as recommended by health authorities.

Thompson, UT Radon Mitigation

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

Thompson, UT Radon Testing

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

Thompson Radon Facts

Key details about the radon risk profile for Thompson and the 84540 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Grand County, UT

Zip Code

84540

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Thompson and the 84540 zip code are located in Grand 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 Thompson, UT

What EPA Radon Zone is Thompson in?

Thompson and the 84540 zip code are in Grand 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 Thompson?

Radon mitigation in Thompson 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 Thompson?

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 Utah

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

City	Avg User Radon Level	Submissions
Vernal	8.60 pCi/L	5
Logan	8.00 pCi/L	5
Smithfield	12.00 pCi/L	4
Bountiful	6.75 pCi/L	4
Cedar City	4.50 pCi/L	4
Eagle Mountain	10.67 pCi/L	3
Heber City	5.00 pCi/L	3
Brigham City	9.00 pCi/L	1
Lehi	7.00 pCi/L	1
Saint George	No submissions	0
Sandy	No submissions	0