Hyperion Sewage Treatment Plant

11/10/25

“What is the largest sewage treatment plant in the western US, and what makes it special?”

The US has thousands of sewage treatment plants. The largest one west of the Mississippi, the Hyperion Sewage Treatment Plant, has many interesting properties. Located in the Los Angeles suburb of El Segundo, the Hyperion sewage treatment plant can treat nearly a half a billion gallons per day and recycles nearly 30 percent of its treated water for non-potable uses. The City of Los Angeles is working to make the Hyperion plant recycle 100 percent of its wastewater for beneficial reuse by 2035, including 174 million gallons per day of purified recycled water. These measures will help Los Angeles thrive in the drought-afflicted climate paradigm of the near future. The Hyperion sewage treatment plant is looking to add membrane bioreactor, reverse osmosis, and UV light disinfection capabilities to its processes.

Image credit: https://www.waterandwastewater.com/