Tapcensus

California

Santa Cruz County drinking water quality

95 active public water systems serve 272,474 people in Santa Cruz County. 58 are compliant, 37 had at least one EPA violation in the past three years, 0 are designated serious violators, and 20 carry a health flag.

Active systems 95 52 community systems
People served 272K by public water systems
Systems with violations 37 39% of active systems, past 3 years
Serious violators 0 20 systems carry a health flag

Needs attention

San Lorenzo Valley Water Dist CA4410014 · Community water system · Serves 21,513 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Slvwd Felton Water System CA4410002 · Community water system · Serves 4,491 2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Aptos High School CA4400750 · Non-Transient non-community system · Serves 1,348 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Mt. Hermon Association, Inc. CA4410008 · Community water system · Serves 1,176 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Alianza Charter School/wcsa CA4400757 · Non-Transient non-community system · Serves 670 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Summit West Mutual Water Co. CA4400617 · Community water system · Serves 481 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Mountain Elementary School CA4400756 · Non-Transient non-community system · Serves 240 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Ridge Mutual Water Company CA4400618 · Community water system · Serves 213 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Fern Grove Water Club CA4400572 · Community water system · Serves 187 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Big Redwood Park Water CA4400526 · Community water system · Serves 182 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.

10 more systems with a serious violator or health flag designation are in the lists below.

Community water systems

52 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Santa Cruz Water Department
 94,626 0 0
Watsonville, City of
Watsonville 		65,231 0 0
Soquel Creek Water District
 40,962 0 0
San Lorenzo Valley Water Dist
 21,513 1 1
Scotts Valley Water District
 11,197 0 0
Slvwd Felton Water System
 4,491 2 1
Central Water District
 2,726 0 0
Mission Springs Conference Center
 1,310 0 0
Mt. Hermon Association, Inc.
 1,176 1 1
Big Basin Water Company
 1,120 0 0
Forest Lakes Mwc
 1,067 0 0
Trout Gulch Mutual Water Company
 614 0 0
Summit West Mutual Water Co.
 481 1 1
Buena Vista Migrant Center
 455 0 0
Villa del Monte Mwc
 422 0 0
Las Cumbres Mutual Water CO
 402 1 0
Monterey Bay Academy
 400 0 0
San Andreas Mutual Water CO
 392 0 0
Forest Springs
 385 0 0
Davenport County Sanitation
 350 0 0
Ridge Mutual Water Company
 213 1 1
Puresource Water, INC
 210 0 0
Rancho San Andreas
 200 0 0
Fern Grove Water Club
 187 1 1
Big Redwood Park Water
 182 1 1
Sunset Beach Mutual Water CO
 182 0 0
Rountree Facility(prev. Sheriff's Rehab)
 160 1 1
Summit Mutual Water Company
 152 1 0
Jardines del Valle
 130 0 0
Crestwood Heights Water Assn
 126 0 0
Jarvis Mutual Water System
 125 1 1
ST Francis Tract Water System
 118 2 0
Rancho Corralitos
 87 0 0
Cathedral Hills Mwc, INC
 75 2 0
Pine Tree Lane Mutual Water CO
 75 1 0
Las Colinas Road & Water Assn
 70 0 0
Laurel Community League
 64 2 1
Cathedral Wood Mutual Water Company
 60 0 0
The Willows Resort
 57 2 1
Allan Lane Water Association
 54 0 0
River Grove Mutual Water Assn
 54 3 0
Vista Robles Association
 53 0 0
Aptos Ridge Mutual Water CO
 52 0 0
Bracken Brae Country Club
 52 3 2
Mount Madonna Center
 50 1 0
Ridgeview Estates Mwc
 50 0 0
Hidden Meadow Mutual Water CO
 45 1 0
Lakeview Apartments
 43 3 1
Meadowridge Mutual Water CO
 42 0 0
Aptos Hills Mutual Water CO
 32 1 0
Non-community systems (43: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Cabrillo College
 12,000 0 0
Aptos High School
 1,348 1 1
Csp Rancho del Oso
 822 0 0
Alianza Charter School/wcsa
 670 1 1
Seventh Day Adventist Camp
 578 0 0
Mystery Spot Snack Shack
 500 0 0
Csp Kirkwood Entrance
 421 0 0
Boulder Creek Scout Reserv.
 302 1 0
Mountain Elementary School
 240 1 1
Kennolyn Camp
 239 0 0
Mountain Summit Mutual Water System
 223 0 0
Gizdich Home Ranch
 213 0 0
Roaring Camp Railroad INC
 193 0 0
Santa Cruz Waldorf School
 190 0 0
LA Madrona Athletic Club
 172 0 0
Koinonia Conference Grounds
 168 0 0
Renaissance High School
 166 1 1
Bonny Doon School
 160 0 0
Camp Chesebrough
 155 0 0
Hidden Falls Girl Scout Camp
 151 1 0
Santa Cruz KOA Campgrounds
 110 0 0
Land of Medicine Buddha
 89 0 0
Loch Lomond Rec Area Santa Cruz WD
 78 0 0
ST Clare's Retreat
 67 0 0
Big Creek Lumber Company
 65 0 0
Orchard School
 65 0 0
Spring Hills Golf Course
 62 0 0
Camp ST Francis
 57 0 0
Vajrayana Foundation
 56 1 0
Kim Son Monastery
 55 0 0
Enchanted Valley
 51 1 0
Kitayama Brothers
Watsonville 		50 1 1
Santa Cruz County Fairgrounds
 50 1 0
Sunny Acres Mwc
 50 0 0
R a Farms
 48 1 1
Los Altos Rod and Gun Club
 46 0 0
Cassin Ranch (driscoll's)
 30 0 0
Csp-Nature Center
 28 0 0
Lockheed Martin Space Systems
 28 4 1
Santa Cruz Mountain Pure WC
 28 1 0
David Bruce Winery
 27 1 0
Quaker Center
 27 0 0
Swanton Berry Farm
 25 1 0
Inactive systems (102, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The California records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.