# Legionella unknown;Legionella pneumophila outbreak — Michigan, 2012-06
> **Water** · Confirmed;Confirmed · 9 ill / 4 hosp / 0 deaths
## Outbreak
- **NORS ID:** NORS-12b443ee9359
- **Date:** 2012-06
- **State:** Michigan
- **Primary mode:** Water
- **Etiology:** Legionella unknown;Legionella pneumophila (serogroup 2)
- **Etiology status:** Confirmed;Confirmed
- **Setting:** Private home/residence
## Impact
- **Illnesses:** 9
- **Hospitalizations:** 4
- **Deaths:** 0
## Water exposure

- **Exposure:** Recreational water -- treated
- **Water type:** Hot Tub/Spa/Whirlpool;Pool - Other Swimming Pool

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