# Legionella pneumophila outbreak — Pennsylvania, 1979-02
> **Water** · Confirmed · 27 ill / 0 hosp / 12 deaths
## Outbreak
- **NORS ID:** NORS-321d11fccbf1
- **Date:** 1979-02
- **State:** Pennsylvania
- **Primary mode:** Water
- **Etiology:** Legionella pneumophila (unknown)
- **Etiology status:** Confirmed
- **Setting:** Hospital
## Impact
- **Illnesses:** 27
- **Hospitalizations:** 0
- **Deaths:** 12
## Water exposure

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

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