# Cyanotoxin outbreak — Michigan, 2021-09
> **Water** · Confirmed · 4 ill / 0 hosp / 0 deaths
## Outbreak
- **NORS ID:** NORS-b5fb30ee64a1
- **Date:** 2021-09
- **State:** Michigan
- **Primary mode:** Water
- **Etiology:** Cyanotoxin
- **Etiology status:** Confirmed
- **Setting:** Ship/boat
## Impact
- **Illnesses:** 4
- **Hospitalizations:** 0
- **Deaths:** 0
## Water exposure

- **Exposure:** Recreational water -- untreated
- **Water type:** Lake/Reservoir

## Source
- [NORS Dashboard](https://wwwn.cdc.gov/norsdashboard/)
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