Cities Look for New Ways to Meet Demand for Water Supplies

San Diego’s water authority increased its supply by lining two irrigation canals to prevent leaks.

SAN DIEGO—A quarter-century ago, San Diego and its suburbs imported 95% of their water supplies. Thanks to investments in desalination and other efforts to boost supplies, that figure has already dropped to 57% and is projected to fall to just 18% sometime in the next two decades.
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