Harrisburg, MO Radon Levels

Q: What EPA Radon Zone is Harrisburg in?

Harrisburg is in Boone County, EPA Zone 2.

Q: How much does radon mitigation cost in Harrisburg?

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

Check local Harrisburg radon levels and find certified testing and mitigation professionals to keep your home safe

Harrisburg, MO Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Boone County, MO

Zip Code 65256

Positioned in Boone County within central Missouri's Columbia metropolitan area, Harrisburg sits on limestone bedrock and glacial deposits that can contribute to elevated radon levels. The community features primarily rural residential properties and newer suburban development, with many homes built on full basement foundations common to the region. While radon testing data for zip code 65256 remains limited, the geological conditions and proximity to Columbia make professional testing advisable for area homeowners.

4.00

pCi/L area average

Above EPA Action Level

Boone County average: 4.00 pCi/L, based on 4 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Harrisburg itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Harrisburg, MO Radon Mitigation

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

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Radon Readings Near Harrisburg, MO

No homeowner tests have been submitted for Harrisburg yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Hallsville	11.7 mi	5.00 pCi/L	2
Columbia	15.3 mi	3.00 pCi/L	2
Boonville	20.0 mi	4.00 pCi/L	1
Mexico	29.8 mi	4.00 pCi/L	1
Holts Summit	37.9 mi	4.00 pCi/L	1
Jefferson City	40.7 mi	6.00 pCi/L	1

Boone County Radon Profile

The soils and bedrock of Boone County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Homeowner-submitted tests from 2 cities in Boone County average 4.00 pCi/L across 4 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Boone County to test, as levels can differ between neighboring homes.

Radon FAQ for Harrisburg, MO

What EPA Radon Zone is Harrisburg in?

Harrisburg and the 65256 zip code are in Boone 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.

Why are radon readings shown from areas near Harrisburg?

No homeowner radon tests have been submitted for Harrisburg yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Boone County average—are the best available indicator of local conditions until Harrisburg homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Harrisburg?

Radon mitigation in Harrisburg 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 Harrisburg?

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.