Desired public contribution in drought resistant water supply

California enters this next year with a water deficit, which is unlikely to recover with an average year of precipitation.

With declining reservoir and groundwater levels, the Metropolitan Water District is innovating new ways to reduce our reliance on imported water.


What do you want to know

  • The Metropolitan Water District is working on a new reliable water source
  • Their new recycling program takes cleaned wastewater and purifies it into drinking water
  • The public comment period is open until November 14

Metropolitan Water District plays a vital role in how we get our water in Southern California.

They are responsible for importing water from the Colorado River system and the State Water Project in Northern California, which is then distributed to southern water agencies.

But these imported water sources are under severe strain from the ongoing drought and the longer-term threat of climate change.

So Metropolitan worked on a new reliable water source.

It’s called the Pure Water Southern California recycling program, which takes cleaned wastewater and purifies it into high-quality drinking water.

(Southern California Metropolitan Water District)

The Pure Water Southern California demonstration site is partnered with the LA County Health District and is located at their facility in Carson.

Although there are many water recycling programs around SoCal, the water from this plant is one of the largest untapped sources in the area to be recycled into drinking water.

This demo site has been testing since 2019, but when this project goes live it will be the largest of its kind in the world, recycling 150 million gallons per day with the potential to reach up to 15 million people.

Now the next major step for the program is the start of their environmental review called the scoping phase.

Community relations team manager Rupam Soni said he was seeking public input on the process, particularly those who live close to potential program facilities, which would include a new sewage treatment plant at Carson and a new pipeline built to carry water from Carson to the San Gabriel. Valley.

“We look at a number of different things, from traffic, to air quality, to noise, to cultural resources, so what community members can provide to us is in each of those areas what are their thoughts, what are their ideas, what are their experiences in their neighborhoods, in their local environment on these themes. Also provide us with ideas on how we can also offset potential impacts, so we are looking for all that information,” Sony said.

The Pure Water Southern California program would create a new, safe and reliable water supply by recycling treated wastewater that would persist during drought and climate change.

(Southern California Metropolitan Water District)

(Southern California Metropolitan Water District)

This demo site tests a three-step purification process that uses state-of-the-art technologies to purify water.

  1. The water flows through the membrane bioreactors.

  2. Reverse osmosis removes 99% of all impurities.

  3. UV light and advanced oxidation sanitize, killing any remaining viruses that may be in the water.

As California enters its fourth drought year and the National Weather Service predicts a drought with above-average temperatures and below-average rainfall, technologies like this are key to creating a sustainable future for California. ‘water.

“We are facing unprecedented conditions on our water resources. We had the driest three years on record in California. Our reservoirs across the state along the Colorado River system are at their lowest level since we began filling them. We need new sources of water, and Pure Water Southern California is the future of water,” Sony said.

This public consultation period is open until November 14.

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