Bluewater or Blue Water may refer to:
- Bluewater Energy Services, a Dutch company providing offshore production vessels and equipment
- Blue Water (missile), British short range nuclear missile of the 1960s
- Blue Water (train), an Amtrak line from eastern Michigan to Chicago
- Deep water in maritime geography
- Blue-water navy, a navy that can operate in deep waters of open oceans
- Bluewater, an environmental science term for collectible water from rainfall
- MV Bluewater, a Panamanian tanker in service 1952-59
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