Sweetwater Authority opens water treatment plant to public for behindthescenes tour
Aug 22, 2026
On another hot August day, residents gathered at the Robert A. Perdue Water Treatment Plant in Spring Valley for a family-friendly event focused on one of the region’s most essential resources: water.
Hosted by Sweetwater Authority, the open house offered the public a rare opportunity to tour t
he facility, learn about the water treatment process, and get a closer look at the Sweetwater Reservoir and Dam, which help provide drinking water to thousands of South Bay residents.
“Today we are opening up our house to the public,” a Sweetwater Authority Director, Hector Martinez said.
While many people understand the importance of drinking plenty of water, fewer know exactly how that water makes its way from a reservoir to their taps. Sweetwater Authority hopes events like this help bridge that gap.
Visitors toured different areas of the treatment plant, where staff explained how water is collected, treated, tested and delivered to customers. The facility is capable of processing approximately 30 million gallons of water each day.
The treatment process begins with water being pumped from the Sweetwater Reservoir. It then goes through a series of filtration and testing procedures, including chemical monitoring and treatments designed to improve the water’s color, odor and taste before it enters the public water system.
Along the tour route, attendees learned about the environmental factors that can affect water quality. Officials explained that even small changes in the watershed can have an impact on the drinking water supply.
“If someone were to wash their car, we don’t necessarily want that going into the reservoir,” said Martinez.
Water quality can also be influenced by weather and climate conditions.
“When the temperature goes up, we have algae blooms that have an effect on the taste of the water,” a Sweetwater Authority representative said.
For attendees like Gino Lee, the event was both educational and personal. Lee brought his son to the open house as an opportunity to learn more about the water system that serves their community.
“He’s interested in how the water comes to our taps,” Lee said.
Sweetwater Authority serves roughly 200,000 residents across the South Bay. Officials said the open house was designed not only to educate customers but also to strengthen public trust and transparency.
“We just want to have a relationship with the public, and we want them to know what we do for them,” said Martinez.
For many visitors, seeing the treatment process firsthand helped build confidence in the safety and reliability of their drinking water.
“We can see what’s going on, so it builds a trust in the water that we use,” Lee said.
The open house featured tours, educational displays, food and water stations, giving residents a closer look at the work that goes into delivering clean drinking water every day.
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