EPA Zone 1 (Highest Risk)☢️ Avg: 6.8 pCi/L

Radon Testing & Mitigation in Denver, Colorado

Denver sits at the heart of Colorado's Front Range, where naturally occurring uranium in the Rocky Mountain geology produces some of the highest radon levels in the country. With an average indoor radon level of 6.8 pCi/L — nearly double the EPA action level — Denver homeowners face a significant radon risk that demands professional testing and mitigation.

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Avg Radon Level

6.8 pCi/L

EPA action: 4.0 pCi/L

EPA Zone

Zone 1

Highest Risk

Metro Population

2.9 million

Service area

Avg Mitigation

$1,200 – $2,200

Installed cost

Avg Testing

$150 – $350

Professional test

Radon Facts for Denver, CO

1Colorado has the 9th highest average radon levels in the nation
2Denver County is classified as EPA Zone 1 — the highest risk category
3Colorado law requires radon disclosure during real estate transactions
4The Denver metro area's rapid growth means thousands of new homes need testing annually
5High altitude and dry climate can intensify radon accumulation in basements

🏠 Denver Housing Stock

Mix of historic bungalows, mid-century ranch homes, and new construction — all susceptible to radon infiltration

📋 Real Estate & Radon Disclosure

Colorado's Seller Property Disclosure requires sellers to disclose known radon test results. Most Denver-area buyers now request radon testing as standard during inspections.

Why Denver Homes Need Radon Testing

With average radon levels of 6.8 pCi/L in the Denver 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 Denver

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High Local Levels

Denver’s average of 6.8 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

Denver’s housing stock — mix of historic bungalows, mid-century ranch homes, and new construction — all susceptible to radon infiltration… — creates conditions where radon can enter and accumulate.

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Colorado Disclosure Laws

Colorado's Seller Property Disclosure requires sellers to disclose known radon test results. Most Denver-area buyers now request radon testing as standard durin… 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 Denver increases risk significantly.

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