COUNTY WATER-SYSTEM LEDGER
San Mateo, California
Compare active community water systems serving this county in EPA's public export. Systems can serve multiple places, so population totals may overlap.
Systems21active CWS · pop. 2,500+
Population served774,819reported total; may overlap
Current violation flag0.0%0 systems
Serious-violator flag0.0%0 systems
01 / SYSTEMS
Water systems serving San Mateo
Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| City Of Daly CityCA4110013 | 104,901 | Surface water purchased | No current violation flagged |
| California Water Service - San MateoCA4110008 | 102,348 | Surface water purchased | No current violation flagged |
| City Of Redwood CityCA4110022 | 92,819 | Surface water purchased | No current violation flagged |
| California Water Service-S San FranciscoCA4110009 | 64,146 | Surface water purchased | No current violation flagged |
| California Water Service - Bear GulchCA4110006 | 61,431 | Surface water | No current violation flagged |
| City Of San BrunoCA4110023 | 42,631 | Surface water purchased | No current violation flagged |
| North Coast County Water DistCA4110025 | 38,546 | Surface water purchased | No current violation flagged |
| Estero Municipal Improvement DistrictCA4110021 | 36,556 | Surface water purchased | No current violation flagged |
| California Water Service - San CarlosCA4110007 | 35,344 | Surface water purchased | No current violation flagged |
| City Of BurlingameCA4110003 | 31,451 | Surface water purchased | No current violation flagged |
| Mid-Peninsula Water DistrictCA4110001 | 30,609 | Surface water purchased | No current violation flagged |
| City Of East Palo AltoCA4110024 | 29,519 | Surface water purchased | No current violation flagged |
| City Of MillbraeCA4110018 | 22,795 | Surface water purchased | No current violation flagged |
| Menlo Park Municipal WaterCA4110017 | 22,362 | Surface water purchased | No current violation flagged |
| Coastside County Water DistrictCA4110011 | 18,940 | Surface water | No current violation flagged |
| Westborough Water DistrictCA4110027 | 13,486 | Surface water purchased | No current violation flagged |
| Town Of HillsboroughCA4110016 | 11,766 | Surface water purchased | No current violation flagged |
| Montara Water And Sanitary DistrictCA4110010 | 6,078 | Surface water | No current violation flagged |
| City Of BrisbaneCA4110002 | 3,402 | Surface water purchased | No current violation flagged |
| Palo Alto Park Mutual Water CompanyCA4110020 | 2,900 | Ground water | No current violation flagged |
| O'Connor Tract Co-Operative Water Co.CA4110019 | 2,789 | Ground water | No current violation flagged |
02 / SOURCE MIX
How to read the population total
It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.