Greenwood, IN Radon Mitigation and Testing

Q: What is the average radon level in Greenwood, IN?

Based on 1 user-submitted tests, the average radon level is 6.00 pCi/L.

Q: What EPA Radon Zone is Greenwood in?

Greenwood is in Johnson County, EPA Zone 1.

Q: How much does radon mitigation cost in Greenwood?

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

Avg: 6.00 pCi/L

Johnson County

EPA Zone 1

1 user test

Situated in Johnson County south of Indianapolis, Greenwood sits on glacial till deposits over limestone bedrock that contribute to elevated radon potential throughout the region. Testing data across zip codes 46142 and 46143 shows an average radon level of 6.0 pCi/L, exceeding the EPA action threshold. The community's predominantly suburban homes with full basements, typical of Indianapolis metro construction, create ideal conditions for radon accumulation.

6.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Greenwood, IN. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Greenwood, IN Radon Mitigation

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

Greenwood, IN Radon Testing

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

Greenwood, Indiana Radon Levels

User-submitted radon test readings from homes in the Greenwood area.

Radon Level	City	Home Age	Foundation	Submitted
6 pCi/L	Greenwood, IN	21-50 Years	Full Basement	May 2025

Have a radon test result for Greenwood? Submit your reading to help other homeowners.

Greenwood Radon Facts

Key details about the radon risk profile for Greenwood and the 46142 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Johnson County, IN

Zip Code

46142

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

6.00 pCi/L

User Tests Submitted

Greenwood and the 46142 zip code are located in Johnson 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 Greenwood, IN

What is the average radon level in Greenwood, IN?

Based on 1 user-submitted test, the average radon level in Greenwood is 6.00 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Greenwood in?

Greenwood and the 46142 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 Greenwood?

Radon mitigation in Greenwood 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 Greenwood?

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