COUNTY WATER-SYSTEM LEDGER

Santa Clara, California

EPA’s September 2026 export lists 16 active community water systems serving Santa Clara, California, with 0 current-violation flags and 0 serious-violator flags among the covered systems.

Source: EPA SDWIS system-search export · Active community systems serving 2,500+ people · Snapshot 13 Sep 2026

Systems16active CWS · pop. 2,500+

Population served2,066,906reported total; may overlap

Current violation flag0.0%0 systems

Serious-violator flag0.0%0 systems

01 / SYSTEMS

Water systems serving Santa Clara, California

EPA associates 16 covered systems with Santa Clara, California; their reported population-served values total 2,066,906 and may overlap.

Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.

EPA community water systems serving Santa Clara, California
Water system	Population served	Primary source	Current export status
San Jose WaterCA4310011	1,039,920	Surface water	No current violation flagged
City Of SunnyvaleCA4310014	157,566	Surface water purchased	No current violation flagged
City Of Santa ClaraCA4310012	130,746	Surface water purchased	No current violation flagged
Great Oaks Wc IncCA4310022	110,088	Ground water	No current violation flagged
City Of San Jose - Evg/Edv/CoyCA4310020	101,265	Surface water purchased	No current violation flagged
City Of MilpitasCA4310005	81,773	Surface water purchased	No current violation flagged
City Of Mountain ViewCA4310007	81,501	Surface water purchased	No current violation flagged
Cwsc Los Altos SuburbanCA4310001	69,973	Surface water purchased	No current violation flagged
City Of Palo AltoCA4310009	67,231	Surface water purchased	No current violation flagged
City Of GilroyCA4310004	59,203	Ground water	No current violation flagged
City Of Morgan HillCA4310006	47,374	Ground water	No current violation flagged
City Of San Jose - Nsj/AlvisoCA4310019	45,559	Surface water purchased	No current violation flagged
Stanford UniversityCA4310013	35,853	Surface water purchased	No current violation flagged
City Of CupertinoCA4310018	16,336	Surface water purchased	No current violation flagged
Nasa Ames Research CenterCA4300997	16,273	Surface water purchased	No current violation flagged
Purissima Hills Water DistrictCA4310021	6,245	Surface water purchased	No current violation flagged

02 / SOURCE MIX

Primary water sources for Santa Clara, California

EPA classifies 16 systems serving Santa Clara, California across 3 primary-source categories; Surface water is the largest category with 1 systems.

Surface water1 systems · 1,039,920 served

Surface water purchased12 systems · 810,321 served

Ground water3 systems · 216,665 served

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.