Tap Truth EPA drinking water records, in plain English

County drinking water records

Santa Clara County, CA drinking water systems

66 community water systems serve Santa Clara County, CA, reporting 2,075,952 people served in all.

19 of them (29%) had at least one health-based violation in the last 10 years. 12 systems still have one unresolved.

34 rely mainly on groundwater and 32 on surface water, counting water bought from other systems.

61 systems filed a lead service line inventory listing 0 lead lines, 28 galvanized lines that must be replaced and 15,619 lines of unknown material.

8 more systems are placed in Santa Clara County, CA by the county their records name because they have no service area map that lines up with their own records, so they are listed apart and not counted here.

Community water systems
66
People served, sum of each system's own figure
2,075,952
Systems with a health-based violation, last 10 years
19
Systems with one unresolved
12
Lead service lines in inventories
0

Water systems serving Santa Clara County

66 systems

People served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
San Jose Water San Jose, Saratoga and 9 more 1,039,920 Surface water 1 0 0
City of Sunnyvale Sunnyvale 157,566 Purchased surface water 0 0 0
City of Santa Clara Santa Clara 130,746 Purchased surface water 0 0 0
Great Oaks WC Inc San Jose 110,088 Groundwater 0 0 0
City of San Jose - Evg/Edv/Coy San Jose 101,265 Purchased surface water 0 0 0
City of Milpitas Milpitas 81,773 Purchased surface water 0 0 0
City of Mountain View Mountain View 81,501 Purchased surface water 0 0 0
CWSC Los Altos Suburban Los Altos, Sunnyvale and 4 more 69,973 Purchased surface water 0 0 0
City of Palo Alto Palo Alto 67,231 Purchased surface water 0 0 0
City of Gilroy Gilroy 59,203 Groundwater 1 0 0
City of Morgan Hill Morgan Hill 47,374 Groundwater 0 0 0
City of San Jose - NSJ/Alviso San Jose 45,559 Purchased surface water 0 0 0
Stanford University Stanford 35,853 Purchased surface water 1 0 0
City of Cupertino Cupertino 16,336 Purchased surface water 0 0 0
Nasa Ames Research Center Mountain View and land outside it 16,273 Purchased surface water 0 0 0
Purissima Hills Water District Los Altos Hills 6,245 Purchased surface water 0 0 0
Cal Am - West San Martin San Martin and land outside it 1,173 Groundwater 1 0 0
San Martin County Water District San Martin 627 Groundwater 0 0 0
Coyote Valley RV Resort Outside cities and towns 500 Groundwater 1 0 0
Camp Saratoga Outside cities and towns 450 Surface water 0 0 0
Thousand Trails - Morgan Hill Outside cities and towns 413 Groundwater 0 0 0
Chemeketa Park Mutual Water Company Lexington Hills 346 Surface water 0 0 0
Aldercroft Heights County Water District Lexington Hills 338 Surface water 0 0 0
Twin Valley Inc Outside cities and towns 317 Groundwater 54 0 0
New Avenue Mutual Water Company Outside cities and towns 305 Groundwater 0 0 0
Mt. Pleasant Water Users Association Outside cities and towns 300 Purchased surface water 0 0 0
Lupin Lodge Outside cities and towns 300 Surface water 3 2 No inventory
Lick Observatory-Ucsc Outside cities and towns 284 Surface water 0 0 0
Saratoga Heights Mutual Water Company Saratoga and land outside it 258 Purchased surface water 0 0 0
Casa De Fruta Water System Outside cities and towns 250 Groundwater 1 2 0
Parkway Lakes RV Park Outside cities and towns 250 Groundwater 0 0 0
Happy Acres MWC Outside cities and towns 220 Groundwater 0 0 0
Melody Woods Water Company Lexington Hills 168 Groundwater 0 0 0
Mt. Eden Mutual Water Company Saratoga 165 Purchased surface water 1 0 0
Lake Canyon Mutual Water Company Outside cities and towns 156 Surface water 1 2 0
Roseview Heights Mutual Water Company East Foothills 148 Purchased surface water 1 2 No inventory
Raineri Mutual Water Company Lexington Hills 145 Surface water 2 2 No inventory
San Martin Foothills Water Company San Martin 145 Groundwater 0 0 0
Kennon Water Company Los Gatos 142 Purchased surface water 1 2 0
Three Springs Ranch Mutual Water Company Outside cities and towns 110 Groundwater 0 0 0
Oak Dell Park Outside cities and towns 104 Groundwater 0 0 0
Mecchi Water Company San Martin 104 Groundwater 0 1 0
Rancho Robles Mutual Water Company Outside cities and towns 103 Groundwater 0 0 0
Green Mountain Water Company Outside cities and towns 80 Groundwater 0 0 0
Vista Grande Water Users Association Outside cities and towns 79 Purchased surface water 0 0 0
Brush and Old Well Mutual Water Company Lexington Hills 70 Purchased surface water 1 2 No inventory
Santa Teresa Meadows Water Company Outside cities and towns 68 Groundwater 0 0 0
Spring Valley Heights Association Inc Milpitas 66 Purchased surface water 0 0 0
Golden Heights Mutual Water Company Outside cities and towns 66 Groundwater 0 0 0
Burchell Road Water Association Outside cities and towns 65 Groundwater 0 0 0
Uvas Pines RV Park Outside cities and towns 65 Groundwater 0 0 0
Oakmont Water System Lexington Hills 61 Purchased surface water 0 0 0
Mireval Improvement Association Los Gatos 60 Purchased surface water 0 0 0
Los Ranchos De Uvas Water Company Outside cities and towns 58 Groundwater 1 2 No inventory
Quail Creek Estates Mutual Water Company Outside cities and towns 55 Groundwater 0 0 0
Sullivan Mutual Water Outside cities and towns 53 Groundwater 1 1 0
Green Acres Mutual Water Outside cities and towns 53 Groundwater 1 2 0
South County Retirement Home San Martin 46 Groundwater 0 0 0
Aborn Heights Water Mutual Association Outside cities and towns 45 Groundwater 0 1 0
Valley View Ranches Outside cities and towns 45 Groundwater 2 0 0
Emerald Valley Mutual Water Company Outside cities and towns 43 Groundwater 0 0 0
Angelo Lane Water Company Outside cities and towns 41 Groundwater 0 0 0
Mountain Springs Mutual Water Company Lexington Hills 40 Purchased surface water 0 0 0
Foothill Mutual Water Company Outside cities and towns 36 Groundwater 2 0 0
Rockwood Estates Mutual Water Company Outside cities and towns 30 Groundwater 0 0 0
Santa Clara Valley Water District San Jose, Palo Alto and 22 more and land outside them Not reported Surface water 0 0 0

Systems placed by county record in Santa Clara County

8 systems

EPA has no service area map for these systems. They are placed by the county their records name (the counties EPA lists them serving, or the county coded in their IDs where EPA lists none), and without a map they are not counted in the figures above.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Maria Lane Mutual Water Company County on record 42 Purchased surface water 0 0 No inventory
Chiri Sweet Water Company County on record 40 Groundwater 0 0 No inventory
Stonebridge Mutual Water Co County on record 38 Groundwater 0 0 No inventory
Deer Hill Mutual Water Co County on record 36 Purchased groundwater 0 0 No inventory
Rancho De Lomas Mutual Water Company County on record 35 Groundwater 1 0 No inventory
Lee's Orchard Owners Association County on record 35 Not reported 0 0 No inventory
Live Oak Creek Mutual Water Company County on record 30 Groundwater 2 0 No inventory
Rucker Avenue Mutual Water Co County on record 25 Groundwater 0 0 No inventory

Cities and towns in Santa Clara County

24 places

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Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations