Which U.S. municipality was the first to adopt reverse osmosis for large-scale water treatment in 1977?

Answer

Cape Coral, Florida

Cape Coral, Florida, holds the distinction of being the first municipality in the United States to successfully implement reverse osmosis on a commercial scale. In 1977, the facility began treating 3 million gallons of water per day, proving the viability of large-scale seawater desalination. This event was a significant milestone that transitioned reverse osmosis from experimental research into a practical, industrial-grade solution for municipal water supplies.

Which U.S. municipality was the first to adopt reverse osmosis for large-scale water treatment in 1977?
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