Tapcensus

Water quality in Mountain House, California

Mountain House is in San Joaquin County. 306 active public water systems serve the county; 69 had an EPA violation in the past three years.

Most likely your provider

City of Mountain House CA3910027 · Community water system · Surface water
Serves 26,400 people Rules violated, past 3 years 0 Last sanitary survey Dec 9, 2025 Distance 1.3 mi

Your location is within the outer bounds of this system's EPA service area.

View system details EPA facility report

Other community water systems in San Joaquin County

92 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Santos Ranch PWS #5-Csa #35
 320 0 2.2 mi
Currier Estates Water Corp
 148 1 2.3 mi
LA Torres Park
 40 1 4.9 mi
Tracy, City of
Tracy		 98,215 0 5.8 mi
Corral Hollow PWS
 145 0 5.9 mi
Morehead Park
 300 2 8.2 mi
Maurland Manor Water System
 92 0 8.2 mi
Fairoaks PWS #44
 1,172 0 8.8 mi
Par Country Estates Csa-16
 178 0 11.9 mi
City of Lathrop
Lathrop		 38,596 0 13.0 mi
San Joaquin County-Mokelumne Acres
 3,802 0 13.0 mi
Oakwood Lake Water District-Subdivision
 1,640 0 13.4 mi
Haven Acres River Club INC
 100 0 13.5 mi
Islander Marina
 150 0 13.9 mi
Cardoza Villa Corp
 30 2 15.7 mi
San Joaquin River Club INC
 600 0 15.9 mi
Martinez Apartments
 26 2 16.5 mi
132 Investments Water System
 187 1 16.7 mi
Manteca, City of
Manteca		 84,928 1 17.5 mi
San Joaquin County-Raymus Village
 1,086 1 18.7 mi
Cdcr California Health Care Facility
Stockton		 2,186 0 19.2 mi
California Water Service Stockton
 182,775 0 19.3 mi
Century Mobile Home Park
 50 1 19.9 mi
City of Stockton
Stockton		 192,702 2 20.0 mi
Sunny Road Water System
 34 1 20.0 mi
All 93 community water systems in San Joaquin County
Non-community systems in San Joaquin County (213: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Gurdawara, Gur Nanak Parkash Water Syste
 26 0 0
Arp Minimart Corp WS
 125 0 0
Southwinds Church of Tracy
 25 0 0
Schulte Road Warehouse 3, LLC Wtr Sys
 110 0 0
Owens-Brockway Glass Container INC
 404 1 0
Tracy Islamic Center Water System
 25 0 0
Corti Water System
 120 0 0
Oasis Marina-Resort
 100 0 0
Church of Jesus Christ of Lds
 100 0 0
Investors of King Island Water Sys
 40 1 0
Pastor ST Bernard Chrch Wtr Sys
 50 0 0
Old River Golf Course
 25 1 0
Valpico Industrial Park
 150 1 1
Country Market
 25 1 0
Lawrence Livermore National Lab-Site 300
 270 0 0
Darrigos Water System
 100 0 0
Carmelo Industrial Park
 50 1 1
Western Pallet Supply & Logistics
 60 1 1
West 11th Street Chevron Water System
 25 0 0
Navarra Water System
 730 0 0
Northwest Pipe Company
 82 2 1
Family Market Water System
 1,105 0 0
Dynatect Ro-Lab, Inc.
 40 1 1
Glassfab Tempering Services Inc.
 125 1 1
Defense Distrib. Depot Tracy Site
 1,249 0 0
Victoria Island Farms
 25 0 0
Banta Inn Water System
 54 0 0
Banta Elementary School
 200 0 0
Tracy Matrl Recvry/sld Waste WS
 130 0 0
Jefferson Esd-Jefferson School
 483 1 1
Carnegie Svra
 186 0 0
Star Motel
 53 1 0
San-I-Pak INC
 25 1 0
Country Mart Diesel & Gas Water Sys
 35 0 0
Bullfrog Landing Marina
 27 0 0
Zapien Market
 50 1 0
FC Tracy Holdings, LLC
 219 0 0
Yongs Bar & Grill Water System
 30 1 0
Petes Place LLC
 50 0 0
Turtle Beach & Water System
 140 0 0
New Jerusalem School
 210 0 0
Raudel Delgado Water System
 56 0 0
Tiki Lagoon Resort & Marina
 50 0 0
Zuckerman, Roscoe 39-316
 30 0 0
Zuckerman Heritage-McDonald
 25 0 0
Turner Cut Resort
 100 0 0
Defense Distrib. Depot, Sharpe Site
 500 0 0
P G & E-Turner Cut Water System
 30 0 0
Franks One/stop Food Mart Water Sys
 300 0 0
Durham Ferry Community School
 31 1 1
All non-community systems
About this data

Water systems are matched to San Joaquin County, nearest to Mountain House first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.

Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.

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. Retrieved from ECHO on Oct 11, 2026.