West Nile Virus in Utah
As of September 2026, Utah has 12 West Nile Virus alerts in the past 30 days (12 confirmed cases).
Risk Level
🔴 High
Active outbreak activity — consult your vet
Cases (30 days)
12
Total Cases
51
Counties Affected
17
Most recent West Nile Virus alert in Utah: Sep 23, 2026
West Nile Virus Alerts in Utah
Box Elder, Utah
Sep 23, 2026 · active
1
confirmed
Utah, Utah
Sep 14, 2026 · active
1
confirmed
Summit, Utah
Sep 14, 2026 · active
1
confirmed
Box Elder, Utah
Sep 14, 2026 · active
1
confirmed
Cache, Utah
Sep 11, 2026 · active
1
confirmed
Wasatch, Utah
Sep 10, 2026 · active
1
confirmed
Salt Lake, Utah
Sep 5, 2026 · active
1
confirmed
Weber, Utah
Sep 2, 2026 · active
1
confirmed
Duchesne, Utah
Sep 2, 2026 · active
1
confirmed
Duchesne, Utah
Sep 2, 2026 · active
1
confirmed
Sevier, Utah
Aug 31, 2026 · active
1
confirmed
Tooele, Utah
Aug 31, 2026 · active
1
confirmed
Weber, Utah
Aug 26, 2026 · active
1
confirmed
Weber, Utah
Aug 26, 2026 · active
1
confirmed
Cache, Utah
Aug 26, 2026 · active
1
confirmed
Cache, Utah
Aug 26, 2026 · active
1
confirmed
Cache, Utah
Aug 26, 2026 · active
1
confirmed
Cache, Utah
Aug 21, 2026 · active
Duchesne, Utah
Aug 21, 2026 · active
1
confirmed
Utah, Utah
Aug 13, 2026 · active
1
confirmed
Morgan, Utah
Aug 13, 2026 · active
1
confirmed
Box Elder, Utah
Aug 6, 2026 · active
1
confirmed
Weber, Utah
Aug 6, 2026 · active
1
confirmed
Beaver, Utah
Oct 8, 2025 · active
1
confirmed
Summit, Utah
Oct 2, 2025 · active
1
confirmed
Showing the 25 most recent of 49 total alerts.
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