Dog Disease Outbreaks in Illinois

Wheaton, DuPage County

Confirmed blue-green algae bloom at Herrick Lake, Herrick Lake Forest Preserve (DuPage Forest Preserve District advisory, Aug 10). Keep dogs out of the water

Glendale Heights, DuPage County

East Branch Forest Preserve off-leash DOG area

Leland

Rabid bat found in a private residence in Leland, DeKalb County's first of 2026. Leland straddles the LaSalle line, so this is pinned to the verified DeKalb County side. Exact address not disclosed

Woodstock

First rabies-positive bat of 2026 season found inside a McHenry County home; resident received PEP. County-only, pinned at county seat

Morrison

Rabies-positive bat, Whiteside County, per IDPH 5/14 release; identified earlier in 2026, exact date not disclosed; pinned at county seat

Springfield

Rabies-positive bat, Sangamon County, per IDPH 5/14 release; identified earlier in 2026, exact date not disclosed; pinned at county seat

Macomb, McDonough County

Is there a dog disease outbreak in Illinois right now?

ParvoMaps is currently tracking 6 active reports in Illinois, most commonly rabies. Reports stay marked active for a set window per disease, then move to historical.

What dog diseases have been reported in Illinois?

Reports in Illinois cover rabies, blue-green algae, parvovirus, drawn from news coverage, health department notices and community reports.

How do I know if a report near me is still current?

Every report carries the date it happened and a link to its source. Each disease has its own active window — blue-green algae advisories expire in 30 days, parvo reports stay active for a year — so a pin marked active is one still worth acting on.