Franklin, IN Radon Levels

Q: What EPA Radon Zone is Franklin in?

Franklin is in Johnson County, EPA Zone 1.

Q: How much does radon mitigation cost in Franklin?

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

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

Franklin, IN Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Johnson County, IN

Zip Code 46131

Located in Johnson County south of Indianapolis, Franklin's 46131 zip code area sits within the Indianapolis Metro where glacial drift over limestone bedrock creates favorable conditions for radon gas production. Although specific testing data for this community is currently limited, residents should prioritize radon testing given the geological characteristics common to central Indiana. The area's mix of older residential neighborhoods and newer suburban developments, many with full basements, provides enclosed below-grade spaces where radon typically accumulates most readily.

Franklin, IN Radon Mitigation

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

Need Radon Mitigation or Testing in Franklin?

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Radon FAQ for Franklin, IN

What EPA Radon Zone is Franklin in?

Franklin and the 46131 zip code are in Johnson County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Franklin?

Radon mitigation in Franklin 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 Franklin?

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 Indiana

Cities in Indiana with the most user-submitted radon test data, ranked by number of submissions.

City	Avg User Radon Level	Submissions
Bloomington	8.14 pCi/L	7
Kokomo	7.40 pCi/L	5
Lafayette	15.00 pCi/L	3
Valparaiso	10.00 pCi/L	3
Westfield	6.33 pCi/L	3
Avon	6.00 pCi/L	3
West Lafayette	10.50 pCi/L	2
Dyer	9.50 pCi/L	2
Columbus	7.50 pCi/L	2
Noblesville	7.00 pCi/L	2