| Mammoth Yosemite Airport | Mammoth Lakes, CA | 13 | 41 | - |
| Rey River Ranch Corp. | Santa Ysabel, CA | 12 | 4 | - |
| Jago Bay Mutual Water Company | San Francisco, CA | 11 | 23 | - |
| L. C. Hunting Club | Butte City, CA | 10 | 23 | - |
| Rinconada Trailer Park | San Luis Obispo, CA | 10 | 6 | - |
| Willow Springs Resort | Bridgeport, CA | 9 | 30 | - |
| North Shore MWC | Fawnskin, CA | 7 | 37 | - |
| Bolo Station RV Park & Snack Bar | Dammeron Valley, CA | 6 | 36 | - |
| Travis Afb WTP - Vallejo | Vallejo, CA | 3 | 0 | - |
| Sfpuc-Pleasanton Wells | Burlingame, CA | 1 | 0 | - |
| Randall-Bold Water Treatment Plant | Concord, CA | 1 | 0 | - |
| Camp Heart Bar Equestrian Group | Fawnskin, CA | 1 | 0 | - |
| Thomas Shaft Wholesale | Burlingame, CA | 1 | 0 | - |
| Ccwd/Brentwood WTP | Concord, CA | 0 | 0 | - |
| Ladwp - Independence | Los Angeles, CA | 0 | 0 | - |
| Ladwp - Lone Pine | Los Angeles, CA | 0 | 1 | - |
| Ladwp - Big Pine | Los Angeles, CA | 0 | 3 | - |
| Ladwp - Manzanar | Los Angeles, CA | 0 | 0 | - |
| Laws Town Ladwp | Los Angeles, CA | 0 | 1 | - |
| Kern County Water Agency | Bakersfield, CA | 0 | 0 | - |
| Antelope Valley E Kern Wtr Agy-Rosamond | Palmdale, CA | 0 | 6 | - |
| Foothill Municipal Water Dist. | La Canada Flintridge, CA | 0 | 10 | - |
| Three Valleys MWD | Claremont, CA | 0 | 3 | - |
| Antelope Valley East Kern Water Agency | Palmdale, CA | 0 | 1 | - |
| Metropolitan Water Dist. of So. Cal. | La Verne, CA | 0 | 1 | - |
| California Domestic Water Company | Whittier, CA | 0 | 1 | - |
| Covina Irrigating Co. | West Covina, CA | 0 | 7 | - |
| East Orange County WD - Wz | Orange, CA | 0 | 6 | - |
| San Juan Basin Authority | Rancho Santa Margarita, CA | 0 | 21 | - |
| Western MWD (Arlington) | Riverside, CA | 0 | 0 | - |
| Chino Basin Desalter Auth. - Desalter 2 | Ontario, CA | 0 | 0 | - |
| Water Facilities Authority-Jpa | Upland, CA | 0 | 0 | - |
| Chino Basin Desalter Auth. - Desalter 1 | Ontario, CA | 0 | 0 | - |
| West End Consolidated Water Company | Upland, CA | 0 | 0 | - |
| Mojave Water Agency | Apple Valley, CA | 0 | 0 | - |
| San Diego County Water Authority | San Diego, CA | 0 | 2 | - |
| Carlsbad Desalination Plant | Carlsbad, CA | 0 | 0 | - |
| Slo Cwd No. 10 - Cayucos WTP | San Luis Obispo, CA | 0 | 4 | - |
| Chorro Valley Pipeline - Slo County | San Luis Obispo, CA | 0 | 0 | - |
| Nacimiento Water Project | San Luis Obispo, CA | 0 | 0 | - |
| Cachuma Project | Santa Barbara, CA | 0 | 0 | - |
| Santa Clara Valley Water District | San Jose, CA | 0 | 9 | - |
| Central Coast Water Authority | Buellton, CA | 0 | 4 | - |
| Sonoma County Water Agency | Santa Rosa, CA | 0 | 3 | - |
| Stanislaus Regional Water Authority | Turlock, CA | 0 | 0 | - |
| United Wtr Cons Dist | Oxnard, CA | 0 | 3 | - |
| Calleguas Municipal Water Dist | Thousand Oaks, CA | 0 | 2 | - |
| Port Hueneme Water Agency | Port Hueneme, CA | 0 | 0 | - |
| Woodland-Davis Clean Water Agency | Woodland, CA | 0 | 0 | - |