West Nile Virus in Washington
As of September 2026, Washington has 2 West Nile Virus alerts in the past 30 days (2 confirmed cases).
Risk Level
🟡 Moderate
Isolated cases — monitor the situation
Cases (30 days)
2
Total Cases
8
Counties Affected
4
Most recent West Nile Virus alert in Washington: Sep 18, 2026
West Nile Virus Alerts in Washington
Franklin, Washington
Sep 18, 2026 · active
1
confirmed
Benton, Washington
Sep 14, 2026 · active
1
confirmed
Benton, Washington
Aug 14, 2026 · active
1
confirmed
Benton, Washington
Aug 11, 2026 · active
1
confirmed
Yakima, Washington
Sep 30, 2025 · active
1
confirmed
Adams, Washington
Sep 26, 2025 · active
1
confirmed
Adams, Washington
Sep 26, 2025 · active
1
confirmed
Yakima, Washington
Sep 12, 2025 · active
1
confirmed
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