Water Recycling Facility Expansions

Water Recycling Facility Expansions | West Basin Water Management District
Working with West Basin, we helped to reduce southern California’s reliance on imported water.
West Basin Water Management District
El Segundo, California, USA

Since 2003, we have been instrumental in assisting West Basin Municipal Water District (West Basin) reach two important goals: delivering 100 percent recycled water for seawater barrier injection, and reducing Southern California's reliance on imported water. HDR was selected for two critical phases of the project.

Phase IV Expansion

Our design of the $54 million Phase IV project included the upgrade and expansion of the barrier water treatment system capacity from 7.5- to 12.5- MGD and tertiary water capacity from 30- to 40-MGD at West Basin's Edward C. Little Water Recycling Facility. Major components included provision of new cartridge filters, immersed microfiltration and reverse osmosis facilities and a new ultraviolet process to provide disinfection and oxidation of trace organics including NDMA. A 14.7-MGD micro filtration unit replaced the barrier system's lime clarification unit which was converted for use as part of the tertiary treatment system. Expansion of the tertiary facilities included a new high rate clarifier, filter upgrades and a product water storage tank and pump station.

Working closely with program managers, plant operators and West Basin staff, our team orchestrated a design-build project around a full-time operating facility.

The Phase IV expansion allows West Basin to safely reuse billions of gallons of highly treated wastewater each year, preserving potable resources, replenishing groundwater, reducing dependence on imported water, and providing a drought-proof supply.

Phase V Expansion

We also completed a capacity evaluation for a planned Phase V Expansion of the MF/RO/UV treatment systems as well as the tertiary treatment system. This included life cycle cost evaluations of multiple expansion options.

The Phase V project expanded the tertiary system from 40- to 50-MGD and expanded the barrier system from 12.5- to 17.5-MGD. We performed preliminary design and owner's representative services. With the completion of the Phase V expansion, West Basin is able to reuse a total of 72 million gallons of water per day.

Key Features

  • The $54 million Phase IV expansion project upgraded the systems at the recycling plant and expanded Title 22 water production
  • The district recycles billions of gallons of wastewater each year
  • Project was awarded the Design-Build Institute of America's Best Project Award for Water, as well as the 2007 WateReuse Project of the Year.
  • Sustainable Features: Recycled Water, Water Reuse, Water Use Reduction
  • Type of Construction: Expansion
  • Professional Services: Design-Build, Owner's Representation, Pre-Design, Tertiary Treatment
  • Project Type: Membrane Treatment, Pump Station, Water, Water Recycling Facility, Water Treatment
  • Related Projects: Drinking Water, Water