City of Alhambra
City of Angels
City of Arcadia
City of Beaumont
City of Blythe
City of Burbank
City of Carlsbad
City of Escondido
City of Indian Wells
City of Long Beach
City of Los Angeles
City of Pasadena
City of Patterson
City of Riverside
City of Sacramento
City of San Diego
City of Sunnyvale
City of Thousand Oaks
City of Vista

County of Los Angeles
County of Sacramento
County of San Bernardino
County of San Diego
County of Santa Barbara

CalEPA
Department of Corrections
Department of General Services

Department of Defense
General Services Administration
National Aeronautics and Space Administration

Central Basin Municipal Water District, Carson, Ca.
Central Valley Water Reclamation Facility, Salt Lake City, Utah
Coachella Valley Water District, Coachella, Ca.
East Bay Municipal Utility District, Oakland, Ca.
Elsinore Valley Municipal Water District, Lake Elsinore, Ca.
Crescenta Valley Water District, La Crescenta, Ca.
Eastern Municipal Water District, Perris, Ca.
El Dorado Irrigation District, Placerville, Ca.
El Toro Water District, El Toro, Ca.
Encina Wastewater Authority, Carlsbad, Ca.
Inland Empire Utilities Agency, Chino, Ca.
Irvine Ranch Water District, Irvine, Ca.
County Sanitation Districts of Los Angeles County, Whittier, Ca.
Los Angeles County Metropolitan Transportation Authority, Los Angeles, Ca.
Los Angeles Unified School District, Los Angeles, Ca.
Metropolitan Water District of Southern California, Los Angeles, Ca.
Monte Vista Water District, Montclair, Ca.
Orange County Sanitation District, Fountain Valley, Ca.
Orange County Water District, Fountain Valley, Ca.
Orange County Transportation Authority, Garden Grove, Ca.
Otay Water District, Spring Valley, Ca.
Sacramento Regional County Sanitation District, Elk Grove, Ca.
Sacramento Regional Transit District, Sacramento, Ca.
San Diego County Water Authority, San Diego, Ca.
Santa Margarita Water District, Las Flores, Ca.
South Orange County Wastewater Authority, Dana Point, Ca.
Transportation Corridor Agency, Costa Mesa, Ca.
Valley Sanitary District, Indio, Ca.
Water Replenishment District of Southern California, Cerritos, Ca.
West Basin Municipal Water District, Carson, Ca.

Ameron Corp.
Boeing Corp.
Calgon Corp.
Catellus Urban Development Corp.
Henkel Corp. (Emery Group)
Hughes Aircraft Corp.
Hyundai Engineering, Co., Ltd.
Lever Brothers, Inc.
Marui International Corp.
Obayashi America Corp.
Shimizu America Corp.
Taisei America Corp.