Ozoning the Aqueduct

by Donald G. McBride, (M.ASCE), Sr. Waterworks Engr.; City of Los Angeles, Dept. of Water & Power, Room 1220, P.O. Box 11, Terminal Annex, Los Angeles, CA 90051,
Gary F. Stolarik, Process Engr.; Los Angeles Aqueduct Filtration Plant, Dept. of Water and Power, City of Los Angeles, 13101 Sepulveda Blvd., Sylmar, CA 91342,

Serial Information: Civil Engineering—ASCE, 1987, Vol. 57, Issue 12, Pg. 81-83

Document Type: Feature article


Only the second of its kind in the United States, the Los Angeles Aqueduct Filtration Plant is using ozone to treat drinking water. The water comes from the Sierra Nevadas via the 300 mi. L.A. Aqueduct and, before the opening of the plant, was treated at the base of the mountains. The plant virtually eliminates trihalomethanes, a side effect of chlorination plants. Regulations are increasing for trihalomethanes, so many folks are carefully watching the L.A. Plant, which is thus far reporting excellent performance. It was constructed and operates for less money than many thought possible.

Subject Headings: Aqueducts | Trihalomethanes | Filtration | Ozone | Water treatment plants | Drinking water | Mountains | Chlorine | United States | Los Angeles | California | Nevada

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