Portland, TN Radon Mitigation and Testing

Q: What EPA Radon Zone is Portland in?

Portland is in Sumner County, EPA Zone 2.

Q: How much does radon mitigation cost in Portland?

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

Sumner County

EPA Zone 2

This Sumner County community in the Nashville Metro area sits on limestone bedrock typical of Middle Tennessee's Highland Rim region. Testing data remains limited for zip code 37148, making it crucial for homeowners to conduct professional radon assessments. Many homes in this area feature basements or crawl spaces built over the limestone geology that can allow radon infiltration.

Portland, TN Radon Mitigation

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

Portland, TN Radon Testing

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

Portland Radon Facts

Key details about the radon risk profile for Portland and the 37148 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Sumner County, TN

Zip Code

37148

Predicted Screening Level

2–4 pCi/L (Zone 2)

Portland and the 37148 zip code are located in Sumner 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 Portland, TN

What EPA Radon Zone is Portland in?

Portland and the 37148 zip code are in Sumner 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 Portland?

Radon mitigation in Portland 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 Portland?

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 Tennessee

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

City	Avg User Radon Level	Submissions
Elizabethton	7.33 pCi/L	3
Cleveland	5.33 pCi/L	3
Johnson City	4.33 pCi/L	3
Maryville	10.50 pCi/L	2
Columbia	8.50 pCi/L	2
Bristol	6.50 pCi/L	2
Chattanooga	5.00 pCi/L	2
Clarksville	20.00 pCi/L	1
Kingsport	5.00 pCi/L	1
Knoxville	4.00 pCi/L	1
Greeneville	No submissions	0
Murfreesboro	No submissions	0