Tapcensus

California

San Joaquin County drinking water quality

306 active public water systems serve 794,026 people in San Joaquin County. 237 are compliant, 69 had at least one EPA violation in the past three years, 0 are designated serious violators, and 21 carry a health flag.

Active systems 306 93 community systems
People served 794K by public water systems
Systems with violations 69 23% of active systems, past 3 years
Serious violators 0 21 systems carry a health flag

Needs attention

Harney Lane Migrant Center WS CA3900581 · Non-Transient non-community system · Serves 500 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Jefferson Esd-Jefferson School CA3901107 · Non-Transient non-community system · Serves 483 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Alpine Meats INC CA3901080 · Non-Transient non-community system · Serves 270 2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Pacific Bell Ue17l Water System CA3901086 · Non-Transient non-community system · Serves 150 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Valpico Industrial Park CA3901409 · Non-Transient non-community system · Serves 150 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Glassfab Tempering Services Inc. CA3901309 · Non-Transient non-community system · Serves 125 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Plug Connection Lodi CA3901278 · Non-Transient non-community system · Serves 102 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Glenwood Mobile Home Park CA3900649 · Community water system · Serves 100 2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions and Consumer Confidence Rule.
A1 Winstons Mobile Home Park CA3900606 · Community water system · Serves 75 2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions.
Western Pallet Supply & Logistics CA3901336 · Non-Transient non-community system · Serves 60 1 rule violated in the past three years. Unresolved: Lead and Copper Rule Revisions.

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

Community water systems

93 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Shady Rest Trailer Court
 150 0 0
Fairway Estates PWS Csa-18
 149 0 0
Currier Estates Water Corp
 148 1 0
Corral Hollow PWS
 145 0 0
Country Squire Mobile Estates & Water SY
 131 1 0
Mobile Villas Trailer Park
 130 0 0
New Hope Landing General Store
 125 0 0
Wilkinson Manor A-Zone PWS
 125 0 0
Lockeford Mobile Home Park Wtr Sys
 123 0 0
Big Wheel Mobile Home Park
 120 0 0
Spring Creek Estates PWS
 119 0 0
Morada Manor Water System
 112 0 0
Walnut Acres
 106 0 0
Morada Acres Water System
 105 0 0
Lodi Lake Mobile Home Park
 104 0 0
Cherry Lane Trailer Park
 100 0 0
Glenwood Mobile Home Park
 100 2 2
Haven Acres River Club INC
 100 0 0
Maurland Manor Water System
 92 0 0
A1 Winstons Mobile Home Park
 75 2 1
Country Club Vista Mutual Water CO
 75 0 0
Country Manor MHP
 75 0 0
Wayside Motel Apartments Wtr Sys
 70 0 0
Sunnyside Estates Water System
 69 0 0
Almond Park Water System
 60 0 0
EL Rio Mobile Home Park
 60 1 0
Finnlees Trailer Park
 55 0 0
Mokelumne Mobile Senior Park
 55 1 1
Riverside Mobile Home Park
 55 1 0
B&g Mobile Home Park LLC WS
 50 0 0
Century Mobile Home Park
 50 1 0
LA Torres Park
 40 1 1
Wine Country Apartments
 40 0 0
Enclave at the Delta
 39 0 0
Fremont One
 39 1 0
Lodi Homes
 39 0 0
Hanot Foundation INC
 38 0 0
V & P Trailer Court Water System
 35 2 0
Sunny Road Water System
 34 1 0
Cardoza Villa Corp
 30 2 1
Martinez Apartments
 26 2 0
Thomas Shaft Wholesale
 1 0 0
Stockton East Water District
 0 0 0
Non-community systems (213: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
New 99 Speedway Water System
 10,000 0 0
Jimmys One Stop
 2,505 0 0
Defense Distrib. Depot Tracy Site
 1,249 0 0
Starbucks
 1,200 0 0
Family Market Water System
 1,105 0 0
Escalon Golf Course WS
 1,010 0 0
Horizon Christian Fellowship
 1,000 0 0
Jahant Food N Fuel Stop
 1,000 0 0
King Island Resort PWS
 1,000 0 0
Smk Chevron
 1,000 0 0
ST Marys High School
 953 0 0
Navarra Water System
 730 0 0
Musd-New Haven School
 626 1 0
Rodeway Inn
 600 0 0
Defense Distrib. Depot, Sharpe Site
 500 0 0
Harney Lane Migrant Center WS
 500 1 1
Jefferson Esd-Jefferson School
 483 1 1
Ripon Usd-Colony Oak School
 465 0 0
Delicato Vineyards
 430 0 0
Lodi Usd-Houston School
 405 0 0
Owens-Brockway Glass Container INC
 404 1 0
Wienerschnitzel
 400 0 0
Lodi Usd-Davis School
 389 1 0
Lodi Usd-Live Oak School
 375 0 0
Sutter Home Winery Inc.
 355 0 0
Oak View Union Elementary Sch
 350 0 0
Musco Family Olive CO
 348 1 0
Deshmesh Darbar Lodi/stk Water Sys
 308 0 0
Cherokee Memorial Park INC Water System
 300 0 0
Denny Boys Water System
 300 1 0
Escalon Premier Brands
 300 1 0
Franks One/stop Food Mart Water Sys
 300 0 0
Alpine Meats INC
 270 2 1
Lawrence Livermore National Lab-Site 300
 270 0 0
Franzia Winery
 250 0 0
Linden Usd-Waterloo Elementary
 225 0 0
Boething Treeland Farms INC
 222 0 0
FC Tracy Holdings, LLC
 219 0 0
New Jerusalem School
 210 0 0
Banta Elementary School
 200 0 0
Eusd-Van Allen School
 200 0 0
Morada Chevron Fast N Easy #60*
 200 0 0
Normans Nursery
 200 0 0
Paradise Point Marina
 200 0 0
Carnegie Svra
 186 0 0
Kellogg Garden Products
 185 0 0
Csp Caswell State Park
 182 0 0
Viejo Ltd
 163 0 0
Cbuso Dba Woodbridge Winery
 150 1 0
Collegeville Market & Cafe
 150 0 0
Pacific Bell Ue17l Water System
 150 1 1
ST Josephs Hospital
 150 0 0
Valpico Industrial Park
 150 1 1
Turtle Beach & Water System
 140 0 0
Flag City Water System
 135 0 0
Tracy Matrl Recvry/sld Waste WS
 130 0 0
Arp Minimart Corp WS
 125 0 0
Austin Industrial Park Water System
 125 1 0
Frank C Alegre Trucking INC WS
 125 0 0
Glassfab Tempering Services Inc.
 125 1 1
Van Groningen & Sons INC Water System
 125 0 0
Podesta Packing Water System
 123 0 0
Corti Water System
 120 0 0
Lodi Usd-Turner Academy at Tokay Colony
 120 0 0
Home Church, the
 116 0 0
Fresh Innovations LLC
 111 0 0
Btqc-Escalon
 110 0 0
San Joaquin Fair 2nd District
 110 1 0
Schulte Road Warehouse 3, LLC Wtr Sys
 110 0 0
Plug Connection Lodi
 102 1 1
Berea Baptist Church Stockton CA
 100 0 0
Church of Jesus Christ of Lds
 100 0 0
Countryside Liquors & Gas
 100 0 0
Darrigos Water System
 100 0 0
Escalon Livestock Mkt
 100 0 0
Escalon Usd Collegeville Sch
 100 0 0
Holiday Harbor Marina
 100 0 0
J M Eagle (ws)
 100 1 0
Linden Usd-Glenwood School
 100 0 0
McManis Family Vineyards Inc.
 100 0 0
Morada Produce
 100 0 0
Oakmoore Congre of Jehovah Wit
 100 0 0
Oasis Marina-Resort
 100 0 0
Ranch Coffee Shop
 100 1 0
Sjc Sports Complex
 100 0 0
Turner Cut Resort
 100 0 0
West Kingdom Hall of Jehovah's Witnesses
 100 1 0
Jahant Woods Cellars
 90 0 0
Basalite Tracy
 86 0 0
Cozad Water System
 85 0 0
SJ County-Redwood School
 83 0 0
Northwest Pipe Company
 82 2 1
Turner Road Vintners (east)
 80 1 0
Marions Ranch House Motel
 78 0 0
EL Rancho Motel
 76 1 0
Manteca Industrial Prk Csa-30
 76 0 0
Stockton Baptist Church
 76 0 0
Korean Presbyterian Church
 70 0 0
Oak Ridge Winery, LLC
 70 1 0
Bethany Temple Water System
 65 0 0
All 213 in the systems table
Inactive systems (268, 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.