The Pomona Water Reclamation Plant (WRP) is located at 295 Humane Way in the City of Pomona. The plant occupies 14 acres northeast of the intersection of the Pomona (60) and Orange (57) Freeways. The original plant, owned by the cities of Pomona, Claremont, and La Verne, was placed into operation in July 1926 with effluent reuse beginning in 1927. Stage I of the present plant was completed in June 1966 and replaced the Tri-City Plant.

CURRENT OPERATION:
The Pomona WRP provides primary, secondary and tertiary treatment for 13 million gallons of wastewater per day (see flow diagram below). The plant serves a population of approximately 130,000 people. Approximately 8 million gallons per day of the purified water is reused at over 90 different reuse sites. Reuse includes landscape irrigation of parks, schools, golf courses, greenbelts, etc.; irrigation and dust control at the Spadra Landfill; and industrial use by local paper manufacturers. The remainder of the purified water is put back into the San Jose Creek channel where it makes its way to the unlined portion of the San Gabriel River. Therefore, nearly 100% of the water is reused since most of the river water percolates into the ground water. Click on the diagram to read about the wastewater treatment and water reclamation process.