Williams, IN Radon Mitigation and Testing

Q: What EPA Radon Zone is Williams in?

Williams is in Lawrence County, EPA Zone 1.

Q: How much does radon mitigation cost in Williams?

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

Lawrence County

EPA Zone 1

Situated in Lawrence County within Indiana's karst region, Williams sits where limestone bedrock and cave systems create EPA Zone 1 radon conditions. Testing data for this 47470 community is presently limited, highlighting the importance of individual home testing. Southern Indiana's distinctive karst topography, with its underground drainage and limestone formations, can create variable radon pathways that require professional assessment to evaluate properly.

Williams, IN Radon Mitigation

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

Williams, IN Radon Testing

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

Williams Radon Facts

Key details about the radon risk profile for Williams and the 47470 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Lawrence County, IN

Zip Code

47470

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Williams and the 47470 zip code are located in Lawrence 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 Williams, IN

What EPA Radon Zone is Williams in?

Williams and the 47470 zip code are in Lawrence 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 Williams?

Radon mitigation in Williams 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 Williams?

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