EPA Zone 1 (Highest Risk)☢️ Avg: 7.4 pCi/L

Radon Testing & Mitigation in Louisville, Kentucky

Kentucky ties for the 6th highest average radon levels in the country, and the Louisville metro area is a hotspot. The region's karst limestone geology — the same geology that creates Kentucky's famous caves — is also a prolific radon producer.

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Avg Radon Level

7.4 pCi/L

EPA action: 4.0 pCi/L

EPA Zone

Zone 1

Highest Risk

Metro Population

1.3 million

Service area

Avg Mitigation

$1,000 – $2,000

Installed cost

Avg Testing

$125 – $300

Professional test

Radon Facts for Louisville, KY

1Kentucky averages 7.4 pCi/L — among the highest in the nation
2Jefferson County (Louisville) is EPA Zone 1
3Kentucky's karst terrain and limestone bedrock are major radon sources
4Southern Indiana suburbs (Floyd, Clark counties) also test high for radon
5The Kentucky Radon Program provides resources and contractor referrals

🏠 Louisville Housing Stock

Mix of historic Louisville neighborhoods and expanding suburban areas — basements are common throughout

📋 Real Estate & Radon Disclosure

Kentucky requires sellers to disclose known material defects including radon. Louisville's real estate market sees increasing radon testing demand.

Why Louisville Homes Need Radon Testing

With average radon levels of 7.4 pCi/L in the Louisville 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 Louisville

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Very High Local Levels

Louisville’s average of 7.4 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

Louisville’s housing stock — mix of historic louisville neighborhoods and expanding suburban areas — basements are common throughout… — creates conditions where radon can enter and accumulate.

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Kentucky Disclosure Laws

Kentucky requires sellers to disclose known material defects including radon. Louisville's real estate market sees increasing radon testing demand.… 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 Louisville increases risk significantly.

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