| AT&T |
| Alameda County Water District |
| Alameda Power & Telecom |
| Alpine Natural Gas |
| Anaheim, City of |
| Antioch Public Works, City of |
| Anza Electric Cooperative |
| Azusa Light and Water, City of |
| Beverly Hills, City of |
| Burbank Water and Power |
| CA consumer Services Agency |
| CA Department of Water Resources |
| CA Independent System Operator |
| CA Water Service |
| Coastside County Water District |
| Colton, City of |
| Compton Municipal Water District |
| Contra Costa Water District |
| Desert Water Agency |
| East Bay Municipal Utility District |
| Encinitas, City of |
| Foothill Municipal Water District |
| Glendale, City of |
| Golden State Water (Anaheim & HQ) |
| Goleta Water District |
| Healdsburg Electric, City of |
| Imperial Irrigation District |
| Kinder Morgan Energy Partners |
| Kinneloa Irrigation District |
| La Canada Irrigation District |
| La Cumbre Mutual Water Co. |
| Lakewood Dept of Water Resources, City of |
| Lassen Municipal Utility District |
| Lodi, City of NEW |
| Lompoc, City of |
| Long Beach Energy Department |
| Long Beach Water Department |
| Los Angeles Department of Water and Power |
| Maywood Mutual Water Company No. 3 |
| Metropolitan Water District |
| Mid Peninsula Water District |
| Modesto Irrigation District |
| Montebello Land & Water Co |
| Mountain View, City of |
| Muscoy Mutual Water |
| Newhall County Water District |
| Orchard Dale Water District |
| Pacific Gas & Electric |
| Pacific Power |
| Palmdale
Water District |
| Palo
Alto Utilities, City of |
| Pasadena,
City of |
| Plumas Sierra Rural Electric Co-op |
| Redding-Electric, City of |
| Roseville Electricity Dept,
City of |
| Sacramento Municipal Utility District |
| Sacramento Suburban Water
District |
| San Francisco Public Utilities Commission |
| San Jose Water Company |
| San
Juan Water District |
| Santa
Clara Valley Water District |
| Santa Clara, City of (electric) |
| Searles Domestic Water Co |
| Sempra Energy Utilities (SD Gas & Elect) |
| Sempra Energy Utilitites (Southern CA Gas) |
| Shasta Lake, City of |
| Sierra Pacific Power Company (DBA NV Energy) |
| Sonoma County Water Agency |
| South
Coast Water District |
| South San Joaquin Irrigation District |
| Southern California Edison |
| Southwest Gas Corporation |
| Sprint-Nextel |
| Stockton MUD, City of |
| SureWest |
| Time Warner Telecom - San Diego |
| Truckee
Donner PUD |
| Turlock Irrigation District |
| Ukiah, City of |
| Vacaville, City of |
| Verizon Wireless |
| Walnut
Valley Water Disrict |
| West Bay Sanitary District |
| West County Wastewater District |
| Western Area Power Administration |
| Zone 7 Water Agency |