San Mateo County, California — public water systems
51 active public water systems serve San Mateo County, reporting 783.5K people served.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
51
Population served
783.5K
Community systems
36
Groundwater share
37.3%
Water systems in San Mateo County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | City of Daly City | San Mateo | 104,901 | Community | Purchased surface water |
| 2 | California Water Service - San Mateo | San Mateo | 102,348 | Community | Purchased surface water |
| 3 | City of Redwood City | San Mateo | 92,819 | Community | Purchased surface water |
| 4 | California Water Service-S San Francisco | San Mateo | 64,146 | Community | Purchased surface water |
| 5 | California Water Service - Bear Gulch | San Mateo | 61,431 | Community | Surface water |
| 6 | City of San Bruno | San Mateo | 42,631 | Community | Purchased surface water |
| 7 | North Coast County Water Dist | San Mateo | 38,546 | Community | Purchased surface water |
| 8 | Estero Municipal Improvement District | San Mateo | 36,556 | Community | Purchased surface water |
| 9 | California Water Service - San Carlos | San Mateo | 35,344 | Community | Purchased surface water |
| 10 | City of Burlingame | San Mateo | 31,451 | Community | Purchased surface water |
| 11 | Mid-Peninsula Water District | San Mateo | 30,609 | Community | Purchased surface water |
| 12 | City of East Palo Alto | San Mateo | 29,519 | Community | Purchased surface water |
| 13 | City of Millbrae | San Mateo | 22,795 | Community | Purchased surface water |
| 14 | Menlo Park Municipal Water | San Mateo | 22,362 | Community | Purchased surface water |
| 15 | Coastside County Water District | San Mateo | 18,940 | Community | Surface water |
| 16 | Westborough Water District | San Mateo | 13,486 | Community | Purchased surface water |
| 17 | Town of Hillsborough | San Mateo | 11,766 | Community | Purchased surface water |
| 18 | Montara Water and Sanitary District | San Mateo | 6,078 | Community | Surface water |
| 19 | City of Brisbane | San Mateo | 3,402 | Community | Purchased surface water |
| 20 | Palo Alto Park Mutual Water Company | San Mateo | 2,900 | Community | Groundwater |
| 21 | O'Connor Tract Co-Operative Water Co. | San Mateo | 2,789 | Community | Groundwater |
| 22 | San Mateo County Memorial Park | San Mateo | 1,790 | Transient non-community | Surface water |
| 23 | Guadalupe Valley Mid | San Mateo | 1,472 | Community | Purchased surface water |
| 24 | Cuesta La Honda Guild Inc. | San Mateo | 915 | Community | Surface water |
| 25 | Csp - Ano Nuevo State Park | San Mateo | 709 | Transient non-community | Groundwater |
| 26 | County Service Area 11 | San Mateo | 642 | Community | Groundwater |
| 27 | Costanoa Campground | San Mateo | 583 | Non-transient non-community | Groundwater |
| 28 | Camp Jones Gulch | San Mateo | 357 | Community | Groundwater |
| 29 | County Service Area 7 | San Mateo | 300 | Community | Surface water |
| 30 | Camp Loma Mar | San Mateo | 208 | Community | Surface water |
| 31 | Optimists Volunteers for Youth | San Mateo | 207 | Transient non-community | Groundwater |
| 32 | Csp - Portola State Park | San Mateo | 181 | Transient non-community | Surface water |
| 33 | Butano Girl Scout Camp | San Mateo | 154 | Transient non-community | Surface water |
| 34 | Butano Canyon Mutual | San Mateo | 150 | Community | Surface water |
| 35 | Butano State Park - Csp | San Mateo | 121 | Transient non-community | Surface water |
| 36 | Redwood Glen Camp & Conference Ctr | San Mateo | 114 | Community | Surface water |
| 37 | Harley Farms Goat Dairy | San Mateo | 113 | Transient non-community | Groundwater |
| 38 | Portola Improvement Association Mwc | San Mateo | 90 | Community | Groundwater under influence of surface water |
| 39 | Pigeon Point Hostel | San Mateo | 67 | Transient non-community | Groundwater |
| 40 | Loma Mar Mutual | San Mateo | 65 | Community | Surface water |
| 41 | Bianchi Flowers Inc. | San Mateo | 65 | Community | Groundwater |
| 42 | Redwood Terrace Mutual | San Mateo | 56 | Community | Groundwater under influence of surface water |
| 43 | Marchi Central Farm | San Mateo | 50 | Community | Groundwater |
| 44 | Skylawn Memorial Park (Skylawn Inc.) | San Mateo | 50 | Non-transient non-community | Groundwater |
| 45 | Martins Beach Water System | San Mateo | 49 | Transient non-community | Surface water |
| 46 | Oku Incorporated | San Mateo | 35 | Community | Groundwater |
| 47 | Uc Elkus Ranch | San Mateo | 34 | Transient non-community | Surface water |
| 48 | La Honda Center | San Mateo | 33 | Transient non-community | Groundwater |
| 49 | Gazos Creek Beach House | San Mateo | 33 | Transient non-community | Groundwater |
| 50 | San Gregorio Company | San Mateo | 32 | Transient non-community | Groundwater under influence of surface water |