Upper San Gabriel Valley Municipal Water District
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602 E. Huntington Drive, Suite B., Monrovia, CA, 91016 | (626) 443-2297

METROPOLITAN, SANITATION DISTRICTS LAUNCH NEW WATER RECYCLING DEMONSTRATION PLANT TO DEVELOP NEW LOCAL WATER SOURCE

CARSON—In a major step toward the potential construction of one of the largest water
recycling plants in the nation, the Metropolitan Water District of Southern California and the
Sanitation Districts of Los Angeles County were joined today by federal, state and local water leaders
to celebrate the start of operations at the Regional Recycled Water Advanced Purification Center.
The 500,000-gallon-per-day demonstration facility takes cleaned wastewater from the
Sanitation Districts’ Joint Water Pollution Control Plant and purifies it using an innovative process
that could significantly improve efficiencies and reduce costs in water recycling.

Over the next 15 months, Metropolitan will put this treatment process through rigorous testing
to ensure the process effectively removes impurities and the resulting water meets the highest quality
standards. The testing and other analyses will help the agencies determine whether to grow the
facility to a full-scale plant that could potentially produce up to 150 million gallons of purified water
daily – enough to serve more than 500,000 homes and industrial facilities.

“Today marks a key step in Metropolitan’s endeavor to directly develop a drought-proof local
water supply for millions of Southern Californians,” said Metropolitan Board Chairwoman Gloria D.
Gray. “Over the last two decades, Metropolitan has steadily diversified the region’s water supply
portfolio and prepared for a changing climate by investing in conservation and local supply projects.
Metropolitan is now scaling that commitment up to a higher level.”

Congresswoman Grace Napolitano, State Water Resources Control Board Chairman Joaquin
Esquivel and Los Angeles Regional Board Chairwoman Irma Muñoz joined Metropolitan and the
Sanitation Districts in celebrating the launch of operations.

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