Harris, MO Radon Mitigation and Testing

Q: What EPA Radon Zone is Harris in?

Harris is in Sullivan County, EPA Zone 2.

Q: How much does radon mitigation cost in Harris?

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

Sullivan County

EPA Zone 2

This small Sullivan County community in north-central Missouri sits on glacial till and underlying sedimentary rock that can produce variable radon levels. Harris features scattered rural properties including older farmhouses and newer construction, with foundation types ranging from full basements to crawl spaces depending on the home's age and location. Given the lack of current radon testing data for zip code 64645, homeowners should prioritize professional testing to understand their individual property conditions.

Harris, MO Radon Mitigation

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

Harris, MO Radon Testing

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

Harris Radon Facts

Key details about the radon risk profile for Harris and the 64645 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Sullivan County, MO

Zip Code

64645

Predicted Screening Level

2–4 pCi/L (Zone 2)

Harris and the 64645 zip code are located in Sullivan 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 Harris, MO

What EPA Radon Zone is Harris in?

Harris and the 64645 zip code are in Sullivan 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 Harris?

Radon mitigation in Harris 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 Harris?

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