Radon Levels in Utah

29 counties — 7 high risk, 22 moderate, 0 low risk

7
22
Zone 1 High (24.1%) Zone 2 Moderate (75.9%) Zone 3 Low (0.0%)

Utah Radon Zone Map

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

Highest-Risk Counties

CarbonZone 1 — High
DuchesneZone 1 — High
GrandZone 1 — High
PiuteZone 1 — High
SanpeteZone 1 — High
SevierZone 1 — High
UintahZone 1 — High

Check Your Utah ZIP Code

All 29 Counties — By Radon Risk

CountyEPA ZoneTests% Above 4 pCi/L
Carbon High — —
Duchesne High — —
Grand High — —
Piute High — —
Sanpete High — —
Sevier High — —
Uintah High — —
Beaver Moderate — —
Box Elder Moderate 7 —
Cache Moderate 10 —
Daggett Moderate — —
Davis Moderate 31 25.8%
Emery Moderate — —
Garfield Moderate — —
Iron Moderate 4 —
Juab Moderate — —
Kane Moderate — —
Millard Moderate — —
Morgan Moderate — —
Rich Moderate — —
Salt Lake Moderate 119 30.3%
San Juan Moderate — —
Summit Moderate 5 —
Tooele Moderate 5 —
Utah Moderate 40 25%
Wasatch Moderate — —
Washington Moderate 24 33.3%
Wayne Moderate — —
Weber Moderate 30 26.7%

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

Frequently Asked Questions

How many counties in Utah have high radon risk?

Utah has 7 counties classified as EPA Zone 1 (high radon risk), 22 as Zone 2 (moderate), and 0 as Zone 3 (low risk).

Is radon a problem in Utah?

Utah has 7 high-risk counties where elevated radon is likely. The EPA recommends all homes in Utah be tested for radon, regardless of which zone they're in.

How do I check radon levels for my Utah 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.