San Francisco Bay Salt Ponds



A recent figure estimates that 80% of the San Francisco Bay wetlands area in California, USA – approximately 16,500 acres (6,700 hectares) – has been developed for salt mining. Water is channelled into large ponds and exits through natural evaporation. The salt that remains can then be collected. The massive ponds get their vibrant colours from the algae that live there and the species’ tolerance to salinity.


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