West Nile Virus in Colorado
Colorado has no recent West Nile Virus activity, but 20 alerts have been recorded historically.
Risk Level
🟢 Low
No cases reported in the past 30 days
Cases (30 days)
0
Total Cases
20
Counties Affected
11
Most recent West Nile Virus alert in Colorado: Oct 1, 2026
West Nile Virus Alerts in Colorado
Grand, Colorado
Oct 1, 2026 · active
1
confirmed
Pueblo, Colorado
Sep 10, 2026 · active
1
confirmed
Montrose, Colorado
Sep 10, 2026 · active
1
confirmed
Morgan, Colorado
Sep 4, 2026 · active
1
confirmed
Weld, Colorado
Sep 1, 2026 · active
1
confirmed
Weld, Colorado
Oct 29, 2025 · active
1
confirmed
Mesa, Colorado
Sep 30, 2025 · active
1
confirmed
Weld, Colorado
Sep 12, 2025 · active
1
confirmed
Weld, Colorado
Aug 14, 2025 · active
1
confirmed
Montrose, Colorado
Aug 12, 2025 · active
1
confirmed
Las Animas, Colorado
Aug 5, 2025 · active
1
confirmed
Douglas, Colorado
Jul 3, 2025 · active
1
confirmed
Prowers, Colorado
Oct 31, 2024 · active
1
confirmed
El Paso, Colorado
Oct 8, 2024 · active
1
confirmed
Douglas, Colorado
Sep 25, 2024 · active
1
confirmed
Douglas, Colorado
Sep 11, 2024 · active
1
confirmed
Weld, Colorado
Aug 30, 2024 · active
1
confirmed
Larimer, Colorado
Aug 22, 2024 · active
1
confirmed
Larimer, Colorado
Aug 22, 2024 · active
1
confirmed
Pueblo, Colorado
Aug 19, 2024 · active
1
confirmed
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