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Indianapolis, IN

Radon help for Indianapolis homeowners

The Indiana Department of Health estimates that 1 in 3 Indiana homes has radon at a level that poses a serious health risk. These guides cover testing, fixing and paying for radon in Indianapolis and its suburbs.

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By tapping “Get my free referral,” I agree that Radon Help Network may send my request to one local radon mitigation company serving Indianapolis, and that this one company may call and text me about my request at the mobile number I entered, including with an autodialer, prerecorded or artificial (AI-generated) voices, and automated texts. Consent is not a condition of any purchase; to get help without agreeing, use our contact form. Msg & data rates may apply; message frequency varies. Reply STOP to opt out. Privacy Policy · Terms

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Three guides for Indianapolis homeowners

Radon mitigation

Radon Mitigation in Indianapolis

Radon mitigation in Indianapolis: Indiana's mitigator license, the national certification behind it, and IDOH's questions to ask an installer.

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Radon mitigation cost

Radon Mitigation Cost in Indianapolis

Radon mitigation cost in Indianapolis from the Indiana Department of Health's own range, what changes a quote, and the price questions to ask.

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Radon testing

Radon Testing in Indianapolis

Radon testing in Indianapolis: Marion County's free radon test, IDOH kit prices and placement rules, licensed testers and the 2–5 year retest.

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Quick facts

Statewide

IDOH estimates 1 in 3 Indiana homes has radon levels that pose a serious health risk.1

Indiana licensing

Indiana requires an IDOH radon license, backed by national NRPP or NRSB certification, to test or mitigate homes.23

Marion County

The county health department takes requests for a free radon test.4

Which guide do you need?

Never tested? The Indianapolis testing guide covers Marion County's free test and IDOH's 2–5 year retest advice. Got a high number? The mitigation guide explains Indiana's license types and IDOH's checklist of questions for installers, and the cost guide starts from the state's own price range.

Suburbs in Hamilton, Hendricks and Johnson counties

Indiana's radon rule is statewide, so the same license applies in Carmel, Fishers, Avon or Greenwood as in Indianapolis.3 Free testing through the Marion County health department is for Marion County, so suburban residents should check with their own county health department, which IDOH says may offer reduced-cost kits.1

Areas we serve

We match homeowners across the Indianapolis area, including these communities and ZIP codes:

ZIP codes are 2020 Census ZIP Code Tabulation Areas, which closely approximate USPS ZIP codes. We list ZIPs that make up a substantial share of each community, so edge ZIPs that barely touch a town are left out, and some ZIPs span two towns.5 Not on the list? Send the form anyway, and we'll tell you if we can help.

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Free · no obligation · shared with one licensed pro only

The home is

By tapping “Get my free referral,” I agree that Radon Help Network may send my request to one local radon mitigation company serving Indianapolis, and that this one company may call and text me about my request at the mobile number I entered, including with an autodialer, prerecorded or artificial (AI-generated) voices, and automated texts. Consent is not a condition of any purchase; to get help without agreeing, use our contact form. Msg & data rates may apply; message frequency varies. Reply STOP to opt out. Privacy Policy · Terms

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Other cities we cover

Please note: Indiana requires an Indiana Department of Health license to test or mitigate radon in homes. This page is general information summarized from public agencies, not professional advice. For advice about your home, talk with an IDOH-licensed radon professional.

Sources

  1. Indiana Department of Health (IDOH), "Radon: A brief guide on how to keep your home and family safe from radon" (PDF, updated Feb. 2026)
  2. IDOH, "Indiana Radon Licensing Instructions" (PDF, April 2026)
  3. IDOH Lead & Healthy Homes Division, "Indiana Certified Radon Testers and Mitigators"
  4. Marion County Public Health Department, "Indoor Air Quality Program"
  5. U.S. Census Bureau, 2020 ZCTA-to-place and ZCTA-to-county-subdivision relationship files
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