EPA Zone 1 (Highest Risk)☢️ Avg: 5.5 pCi/L

Radon Testing & Mitigation in Indianapolis, Indiana

Indianapolis and central Indiana sit squarely in EPA Zone 1 for radon risk. The flat terrain and glacial deposits across Marion County and surrounding suburbs create conditions where radon gas readily migrates through soil and into home foundations.

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Avg Radon Level

5.5 pCi/L

EPA action: 4.0 pCi/L

EPA Zone

Zone 1

Highest Risk

Metro Population

2.1 million

Service area

Avg Mitigation

$1,000 – $2,000

Installed cost

Avg Testing

$125 – $300

Professional test

Radon Facts for Indianapolis, IN

1Indiana averages above the EPA action level statewide
2Marion County and most surrounding counties are EPA Zone 1
3Indiana's real estate disclosure form includes radon questions
4The Indiana State Department of Health runs an active radon program with free test kits
5Indianapolis's extensive suburban housing stock means high demand for residential radon services

🏠 Indianapolis Housing Stock

Large suburban footprint with ranch-style and split-level homes, many built on slab or crawl space foundations susceptible to radon

📋 Real Estate & Radon Disclosure

Indiana requires radon disclosure in real estate transactions. The active Indianapolis housing market drives steady demand for pre-sale radon testing.

Why Indianapolis Homes Need Radon Testing

With average radon levels of 5.5 pCi/L in the Indianapolis metro area — well above the EPA’s recommended action level of 4.0 pCi/L — professional radon testing isn’t optional, it’s essential.

Radon inspector testing a home in Indianapolis

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High Local Levels

Indianapolis’s average of 5.5 pCi/L means a significant percentage of homes exceed the EPA action level. The only way to know your home’s level is to test.

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Local Housing Factors

Indianapolis’s housing stock — large suburban footprint with ranch-style and split-level homes, many built on slab or crawl space foundations susceptib… — creates conditions where radon can enter and accumulate.

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Indiana Disclosure Laws

Indiana requires radon disclosure in real estate transactions. The active Indianapolis housing market drives steady demand for pre-sale radon testing.… Proactive testing protects both buyers and sellers.

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Family Health Risk

Radon is the #2 cause of lung cancer in the US, responsible for 21,000 deaths annually. Long-term exposure in a high-radon area like Indianapolis increases risk significantly.

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Affordable Protection

Testing costs just $125 – $300 and mitigation averages $1,000 – $2,000 in Indianapolis — a small price for your family’s safety and your home’s value.

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