Smithfield, UT Radon Mitigation and Testing

Q: What is the average radon level in Smithfield, UT?

Based on 4 user-submitted tests, the average radon level is 12.00 pCi/L.

Q: What EPA Radon Zone is Smithfield in?

Smithfield is in Cache County, EPA Zone 2.

Q: How much does radon mitigation cost in Smithfield?

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

Avg: 12.00 pCi/L

Cache County

EPA Zone 2

4 user tests

Nestled in Cache County within the Logan Metro area, Smithfield sits in Cache Valley where Lake Bonneville deposits over limestone bedrock contribute to the region's radon potential. Local testing reveals an average radon level of 12.0 pCi/L, which significantly exceeds the EPA action level and makes professional mitigation systems essential for most homes. The community's housing includes both historic pioneer-era construction and modern suburban development, typically featuring full basements that can accumulate radon gas throughout zip code 84335.

12.00

pCi/L average

Above EPA Action Level

Based on 4 user-submitted radon tests for homes in Smithfield, UT. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Smithfield, UT Radon Mitigation

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

Smithfield, UT Radon Testing

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

Smithfield, Utah Radon Levels

User-submitted radon test readings from homes in the Smithfield area.

Radon Level	City	Home Age	Foundation	Submitted
7 pCi/L	Smithfield, UT	0-20 Years	Full Basement	Oct 2025
20 pCi/L	Smithfield, UT	0-20 Years	Full Basement	Aug 2024
10 pCi/L	Smithfield, UT	0-20 Years	Full Basement	Jan 2023
11 pCi/L	Smithfield, UT	0-20 Years	Full Basement	Mar 2017

Have a radon test result for Smithfield? Submit your reading to help other homeowners.

Smithfield Radon Facts

Key details about the radon risk profile for Smithfield and the 84335 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Cache County, UT

Zip Code

84335

Predicted Screening Level

2–4 pCi/L (Zone 2)

Avg. User Submitted Level

12.00 pCi/L

User Tests Submitted

Smithfield and the 84335 zip code are located in Cache 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 Smithfield, UT

What is the average radon level in Smithfield, UT?

Based on 4 user-submitted tests, the average radon level in Smithfield is 12.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Smithfield in?

Smithfield and the 84335 zip code are in Cache 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 Smithfield?

Radon mitigation in Smithfield 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 Smithfield?

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