Portland, MO Radon Mitigation and Testing

Q: What EPA Radon Zone is Portland in?

Portland is in Callaway 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.

Callaway County

EPA Zone 2

Located in Callaway County within the Jefferson City metro area, Portland sits on Missouri River bluff formations that can harbor varying radon potential. Testing data for zip code 65067 remains limited, emphasizing the importance of individual home assessment. The area's limestone bedrock and mixed residential development make property-specific testing essential for understanding indoor air quality.

Portland, MO Radon Mitigation

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

Portland, MO 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 65067 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Callaway County, MO

Zip Code

65067

Predicted Screening Level

2–4 pCi/L (Zone 2)

Portland and the 65067 zip code are located in Callaway 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, MO

What EPA Radon Zone is Portland in?

Portland and the 65067 zip code are in Callaway 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 Missouri

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

City	Avg User Radon Level	Submissions
Troy	8.50 pCi/L	4
Lees Summit	7.00 pCi/L	3
Columbia	3.00 pCi/L	2
House Springs	7.00 pCi/L	1
Kansas City	7.00 pCi/L	1
Springfield	7.00 pCi/L	1
Independence	5.00 pCi/L	1
Wentzville	No submissions	0