Newark, MO Radon Mitigation and Testing

Q: What EPA Radon Zone is Newark in?

Newark is in Knox County, EPA Zone 2.

Q: How much does radon mitigation cost in Newark?

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

Knox County

EPA Zone 2

Positioned in rural Knox County in northern Missouri, Newark has minimal radon testing data available for homeowner guidance. The region's glacial till soils over sedimentary bedrock can create conditions conducive to radon gas accumulation in residential foundations. Local residents should consider independent radon testing to establish baseline levels, particularly in homes with basements common in this area's traditional housing stock.

Newark, MO Radon Mitigation

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

Newark, MO Radon Testing

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

Newark Radon Facts

Key details about the radon risk profile for Newark and the 63458 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Knox County, MO

Zip Code

63458

Predicted Screening Level

2–4 pCi/L (Zone 2)

Newark and the 63458 zip code are located in Knox 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 Newark, MO

What EPA Radon Zone is Newark in?

Newark and the 63458 zip code are in Knox 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 Newark?

Radon mitigation in Newark 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 Newark?

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