# Legionella pneumophila;Legionella pneumophila;Legionella pneumophila outbreak — California, 1991-03
> **Water** · Confirmed;Confirmed;Confirmed · 5 ill / 5 hosp / 0 deaths
## Outbreak
- **NORS ID:** NORS-104eca44b53d
- **Date:** 1991-03
- **State:** California
- **Primary mode:** Water
- **Etiology:** Legionella pneumophila;Legionella pneumophila;Legionella pneumophila (serogroup 4;serogroup 5;serogroup 6)
- **Etiology status:** Confirmed;Confirmed;Confirmed
- **Setting:** Hospital
## Impact
- **Illnesses:** 5
- **Hospitalizations:** 5
- **Deaths:** 0
## Water exposure

- **Exposure:** Undetermined water
- **Water type:** —

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