Counties
- Under 10%
- 10–20%
- 20–30%
- 30–40%
- 40% or more
| County | Tests | % ≥ 4 pCi/L | Median (pCi/L) | EPA zone (1993) | Source |
|---|---|---|---|---|---|
| Hawaii County | — | — | — | Zone 3 | — |
| Honolulu County | — | — | — | Zone 3 | — |
| Kalawao County | — | — | — | Zone 3 | — |
| Kauai County | — | — | — | Zone 3 | — |
| Maui County | — | — | — | Zone 3 | — |
Test your home
County figures show how often tests come back high, not the level in your home. Only a test tells you that: see how to test for radon.
Sponsored: we earn a commission on purchases through these links. We haven't tested Airthings monitors yet.
Prefer a digital monitor? See Airthings radon monitors, or enter code radonbycounty-10OFF at their discount store for 10% off.