Delphi, IN Radon Mitigation and Testing

Q: What EPA Radon Zone is Delphi in?

Delphi is in Carroll County, EPA Zone 1.

Q: How much does radon mitigation cost in Delphi?

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

Carroll County

EPA Zone 1

Found in Carroll County within the Lafayette Metro area, Delphi sits on Indiana's glacial till plains where dense clay soils over limestone bedrock create moderate radon potential. Testing data for this 46923 zip code community remains limited, making individual home assessment crucial for residents. Given Indiana's variable geological conditions, homeowners should conduct professional radon testing regardless of regional trends.

Delphi, IN Radon Mitigation

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

Delphi, IN Radon Testing

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

Delphi Radon Facts

Key details about the radon risk profile for Delphi and the 46923 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Carroll County, IN

Zip Code

46923

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Delphi and the 46923 zip code are located in Carroll County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Delphi, IN

What EPA Radon Zone is Delphi in?

Delphi and the 46923 zip code are in Carroll 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 Delphi?

Radon mitigation in Delphi 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 Delphi?

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

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
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
Westfield	7.00 pCi/L	2
Fishers	6.50 pCi/L	2
Corydon	6.00 pCi/L	2
Warsaw	5.50 pCi/L	2
Indianapolis	4.00 pCi/L	2
Newburgh	8.00 pCi/L	1
Logansport	7.00 pCi/L	1
Terre Haute	5.00 pCi/L	1
Muncie	4.00 pCi/L	1
Brownsburg	No submissions	0