On Friday, officials said only about 20% of the water from this week's storm will be captured before it flows away.
Storm water capture plays an important role in the Los Angeles Department of Water and Power's overall plan to enhance local water supply, and this week's rain put the plan to work.
"The water gets diverted into those spreading grounds. They're huge if you think of 150 acres for those spreading grounds alone, so that water then gets pooled and then gets recharged into the ground water for future use," said Castro. "We put that into subterranean chambers, and what that does is it cleans the water, cleans the pollutants from the street to prevent those pollutants from actually getting into the L.A. River, and eventually, into the Pacific Ocean," explained Castro. "At the same time we able to capture that water for the potable supply."
Southern California still imports about 60% of its water and officials said it will take a regionwide effort to capture all the water.
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