Radon Levels in Hawaii

5 counties — 0 high risk, 0 moderate, 5 low risk

5
Zone 1 High (0.0%) Zone 2 Moderate (0.0%) Zone 3 Low (100.0%)

Hawaii Radon Zone Map

Counties colored by EPA radon zone. Red = Zone 1, Orange = Zone 2, Green = Zone 3.

Check Your Hawaii ZIP Code

All 5 Counties — By Radon Risk

CountyEPA ZoneTests% Above 4 pCi/L
Hawaii Low 44 25%
Honolulu Low 177 26.6%
Kalawao Low — —
Kauai Low 12 —
Maui Low 26 30.8%

Sources: EPA Map of Radon Zones, CDC Environmental Health Tracking Network

Frequently Asked Questions

How many counties in Hawaii have high radon risk?

Hawaii has 0 counties classified as EPA Zone 1 (high radon risk), 0 as Zone 2 (moderate), and 5 as Zone 3 (low risk).

Is radon a problem in Hawaii?

The EPA recommends all homes in Hawaii be tested for radon, regardless of which zone they're in.

How do I check radon levels for my Hawaii address?

Enter your ZIP code in the search box above to see your county's EPA radon zone and available testing data. For your specific home's radon level, you'll need a radon test kit.