We found 112 public water systems that could serve the same population as Csp - Ano Nuevo State Reserve (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| City Of Daly City | Daly City | 102,593 | 92 | 4 |
| California Water Service - San Mateo | County of San Mateo | 101,004 | 30 | 2 |
| City Of Redwood City | Redwood City | 84,557 | 26 | 3 |
| California Water Service-s San Francisco | County of San Mateo | 61,769 | 62 | 3 |
| California Water Service - Bear Gulch | County of San Mateo | 58,432 | 57 | 4 |
| City Of San Bruno | San Bruno | 40,165 | 82 | 1 |
| North Coast County Water Dist | Pacifica | 38,292 | 27 | 2 |
| Estero Municipal Improvement District | San Mateo | 35,000 | 27 | 4 |
| City Of Burlingame | Burlingame | 29,867 | 26 | 5 |
| California Water Service - San Carlos | County of San Mateo | 29,554 | 23 | 4 |
| Mid-peninsula Water District | Belmont | 28,050 | 25 | 3 |
| City Of East Palo Alto | East Palo Alto | 28,000 | 24 | 12 |
| City Of Millbrae | Millbrae | 22,795 | 28 | 0 |
| Coastside County Water District | Half Moon Bay | 18,871 | 65 | 14 |
| City Of Menlo Park | Menlo Park | 14,139 | 31 | 1 |
| Westborough County Water Dist | County of San Mateo | 14,050 | 0 | 2 |
| Hillsborough Water Dept. | Burlingame | 11,260 | 27 | 2 |
| Montara Water And Sanitary District | County of San Mateo | 4,374 | 101 | 4 |
| City Of Brisbane | Brisbane | 3,308 | 0 | 10 |
| O'connor Tract Co-operative Water Co. | County of San Mateo | 3,128 | 0 | 3 |
| Guadalupe Municipal Improvemen | County of San Mateo | 3,000 | 0 | 0 |
| Palo Alto Park Mutual Water Company | County of San Mateo | 2,500 | 0 | 3 |
| Csp Mt Tamalpais-summit | Nc Day Use | 2,049 | 0 | 0 |
| San Mateo County Memorial Park | County of San Mateo | 1,790 | 0 | 25 |
| Skyline County Water District | County of San Mateo | 1,650 | 0 | 0 |
| San Mateo High School | County of San Mateo | 1,000 | 0 | 0 |
| Pillar Ridge Mhp (former El Granada Mhp) | County of San Mateo | 1,000 | 0 | 0 |
| Guadalupe Valley Mid | County of San Mateo | 973 | 0 | 5 |
| Bean Hollow Comfort Station | County of San Mateo | 958 | 0 | 0 |
| Menlo College | County of San Mateo | 850 | 0 | 0 |
| Cuesta La Honda Guild Inc | County of San Mateo | 750 | 0 | 2 |
| Dimond Public Utility Dist | County of San Mateo | 725 | 0 | 0 |
| Capitol State Parks | County of San Mateo | 504 | 0 | 0 |
| Butano State Park - Csp | County of San Mateo | 500 | 0 | 4 |
| S M Co Parks & Rec Dept | County of San Mateo | 500 | 0 | 0 |
| County Service Area 11 | County of San Mateo | 450 | 0 | 24 |
| Skylonda Mutual | County of San Mateo | 420 | 0 | 50 |
| Cutter Scout Reservation | County of San Mateo | 402 | 0 | 6 |
| Camp Jones Gulch | County of San Mateo | 357 | 0 | 2 |
| County Service Area 7 | County of San Mateo | 300 | 0 | 50 |
| Csp - Portola State Park | County of San Mateo | 250 | 0 | 28 |
| Nestldown Ranch | County of San Mateo | 250 | 0 | 0 |
| Optimists Volunteers For Youth | County of San Mateo | 200 | 0 | 1 |
| Convent Of The Sacred Heart | County of San Mateo | 200 | 0 | 0 |
| WOODSIDE MUTUAL | County of San Mateo | 195 | 0 | 0 |
| Camp Loma Mar | County of San Mateo | 176 | 0 | 42 |
| Synanon Home Place Ranch | County of San Mateo | 173 | 0 | 0 |
| Redwood Glen Camp & Conference Ctr | County of San Mateo | 169 | 0 | 25 |
| Butano Canyon Mutual | County of San Mateo | 150 | 0 | 31 |
| Butano State Park | County of San Mateo | 150 | 0 | 0 |
| Pacific Mushroom Farm | County of San Mateo | 150 | 0 | 0 |
| Mens Correctional Center | County of San Mateo | 150 | 0 | 0 |
| Maintenance District | County of San Mateo | 110 | 0 | 0 |
| Pescadero High School | County of San Mateo | 105 | 0 | 0 |
| Harley Farms Goat Dairy | County of San Mateo | 100 | 0 | 0 |
| Portola Improvement Association | County of San Mateo | 100 | 0 | 0 |
| St Patricks Seminary | County of San Mateo | 100 | 0 | 0 |
| Kings Mountain Park Mutual | County of San Mateo | 66 | 0 | 0 |
| Uc Elkus Ranch | County of San Mateo | 66 | 0 | 0 |
| Bianchi Flowers Inc | County of San Mateo | 65 | 0 | 0 |
| Loma Mar Mutual | County of San Mateo | 65 | 0 | 0 |
| St John Mutual Water Company | County of San Mateo | 60 | 0 | 0 |
| Cordillers Mutual Water Company | County of San Mateo | 59 | 0 | 0 |
| Log Cabin Ranch | County of San Mateo | 55 | 0 | 0 |
| Marchi Central Farm | County of San Mateo | 50 | 0 | 0 |
| Skylawn Memorial Park (skylawn Inc) | County of San Mateo | 50 | 0 | 0 |
| La Honda Properties | County of San Mateo | 50 | 0 | 0 |
| Dinellis | County of San Mateo | 50 | 0 | 0 |
| Duartes | County of San Mateo | 50 | 0 | 0 |
| Nicasio School | County of San Mateo | 50 | 0 | 0 |
| Pescadero Elementary School | County of San Mateo | 50 | 0 | 0 |
| Dearborne Park Water System | County of San Mateo | 45 | 0 | 0 |
| Redwood Terrace Mutual | County of San Mateo | 43 | 0 | 0 |
| Spring Creek Lane M W C | County of San Mateo | 40 | 0 | 0 |
| Ano Nuevo Flower Growers | County of San Mateo | 36 | 0 | 0 |
| Oku Inc | County of San Mateo | 35 | 0 | 0 |
| Webb Ranch | County of San Mateo | 35 | 0 | 0 |
| Durarte's Water System | County of San Mateo | 34 | 0 | 0 |
| Costanoa Campground | County of San Mateo | 33 | 0 | 0 |
| Silva Wholesale Florist | County of San Mateo | 30 | 0 | 0 |
| Austin Creek - Block 5 & 6 | County of San Mateo | 30 | 0 | 0 |
| Martins Beach Water System | County of San Mateo | 27 | 0 | 0 |
| Pigeon Point Youth Hostel | County of San Mateo | 25 | 0 | 0 |
| Gazos Creek Beach House | County of San Mateo | 25 | 0 | 0 |
| La Honda Center | County of San Mateo | 25 | 0 | 0 |
| San Gregorio Company | County of San Mateo | 25 | 0 | 0 |
| Butano Girl Scout Camp | County of San Mateo | 25 | 0 | 0 |
| Csp Indian Beach | No Present Use | 25 | 0 | 0 |
| Nps Golden Gate Nra | Nc Ft Funston | 25 | 0 | 0 |
| Nps Golden Gate Nra | Nc Kirby Cove | 25 | 0 | 0 |
| Amesport Mutual Water Company | County of San Mateo | 25 | 0 | 0 |
| Laguna Joint School | County of San Mateo | 25 | 0 | 0 |
| Lincoln School | County of San Mateo | 25 | 0 | 0 |
| Union Joint School | County of San Mateo | 25 | 0 | 0 |
| California Golf Club | County of San Mateo | 25 | 0 | 0 |
| Williamson Store | County of San Mateo | 25 | 0 | 0 |
| Stone Pine Mutual Water Company | County of San Mateo | 25 | 0 | 0 |
| Jacobs Farms | County of San Mateo | 25 | 0 | 0 |
| Bean Hollow S.b. Residence | County of San Mateo | 25 | 0 | 0 |
| Coast Wholesale Florists Inc | County of San Mateo | 17 | 0 | 0 |
| Cabrillo Farms Inc | County of San Mateo | 15 | 0 | 0 |
| Crocker Curve Water Co | County of San Mateo | 15 | 0 | 0 |
| James Folan | County of San Mateo | 12 | 0 | 0 |
| Vince Muzzi | County of San Mateo | 12 | 0 | 0 |
| Tom Phipps | County of San Mateo | 11 | 0 | 0 |
| Alexander Cozzolino | County of San Mateo | 8 | 0 | 0 |
| Isamu Kuwahara | County of San Mateo | 7 | 0 | 0 |
| Robert Cervasco | County of San Mateo | 5 | 0 | 0 |
| Pete Marchi And Sons | County of San Mateo | 5 | 0 | 0 |
| Csp Inverness Ridge | Nc Park Res | 2 | 0 | 0 |
| Los Trancos Wd | County of San Mateo | 0 | 0 | 0 |
| Csp Ano Nuevo State Reserve | Nc Park Res | 0 | 0 | 0 |