Water Providers in San Mateo County
- Burlingame Water Department
- California Water Service
- California Water Service - Dominguez
- California Water Service - Marysville
- California Water Service - San Mateo
- CalWater - Bakersfield
- CalWater - Bear Gulch
- CalWater (California Water Service) - Visalia
- Cal Water - City Of King
- CalWater - Dixon
- Cal Water - Oroville
- Calwater - Salinas Hills
- CalWater - San Carlos
- CalWater - South San Francisco
- CalWater - Travis Air Force Base
- CalWater - Willows
- City Of San Jose Water - North San Jose/Alviso
- Coastside County Water District
- Daly City Water
- East Palo Alto Water
- Estero Municipal Improvement District
- Great Oaks Water
- Menlo Park Water
- Mid Peninsula Water
- Millbrae Water Department
- North County Water District (NCCWD)
- Redwood City Water
- San Bruno Water
- San Francisco Public Utilities Commission - SFPUC
- San Jose Water (Edenvale & Coyote Valley)
- Westborough Water District
Water Providers by City
- Atherton
- Belmont
- Burlingame
- Daly City
- East Palo Alto
- Foster City
- Half Moon Bay
- Menlo Park
- Millbrae
- Pacifica
- Portola Valley
- Redwood City
- San Bruno
- San Carlos
- San Francisco
- San Jose
- South San Francisco
- Woodside
