| Antelope Valley-East Kern Water Agency | (661) 943-3201 |
| Antelope Park Mutual Water Company | (661) 945-2238 |
| Averydale Mutual Water Company | (661) 946-2256 |
| California Water Service Company (Cal Water) | (661) 943-9001 |
| El Dorado Mutual Water Company | (661) 947-3255 |
| Green Valley Mutual Water Company | (661) 270-0836 |
| Lake Elizabeth Mutual Water Company | (661) 724-1806 |
| Land Projects Mutual | (661) 948-2550 |
| Landale Mutual Water Company | (661) 943-9001 |
| Littlerock Creek Irrigation District | (661) 944-2015 |
| Los Angeles County Waterworks | (661) 942-1157 |
| Palm Ranch Irrigation District | (661) 943-2469 |
| Palmdale Water District | (661) 947-4111 |
| Quartz Hill Water District | (661) 943-3170 |
| Rosamond Community Services District | (661) 256-3411 |
| Shadow Acres Mutual | (661) 947-0200 |
| Sundale Mutual Water Company | (661) 256-2620 |
| Sunnyside Farms Mutual Water Company | (661) 947-3437 |
| West Valley County Water District | (661) 724-1860 |
| Westside Park Mutual Water | (661) 267-2181 |
| White Fence Farms | (661) 943-3316 |