Tapcensus

Water quality for ZIP code 92173

ZIP 92173 covers San Diego in San Diego County, California, one of 115 ZIP codes in the county. 198 active public water systems serve the county; 83 had an EPA violation in the past three years.

Most likely your provider

Cal-Am Water Coronado CA3710001 · Community water system · Surface water purchased
Serves 106,000 people Rules violated, past 3 years 1 Last sanitary survey Nov 30, 2023 Distance 5.6 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 Diego County

81 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Sweetwater Authority
 184,915 0 6.8 mi
Otay Water District
 242,155 0 10.6 mi
MHC TT Inc. (dba Pio Pico)
 23 0 12.8 mi
Nas North Island & Nab Coronado
 421 0 13.9 mi
Helix Water District
 277,918 0 16.5 mi
San Diego County Water Authority
 0 0 18.5 mi
San Diego, City of
San Diego		 1,408,937 0 20.1 mi
Barrett Lake MH and RV LLC
 300 1 21.0 mi
Sunrise Estates Mutual Water Company
 150 2 21.0 mi
Padre Dam Mwd
 93,980 0 22.1 mi
Lakeside WD
 35,500 1 23.5 mi
Twin Lakes Resort
 400 5 25.6 mi
Alpine Oaks Estates LLC
 185 0 26.1 mi
Willowside Terrace Water Association
 100 2 27.0 mi
Poway, City of
Poway		 49,888 0 29.8 mi
Del Mar, City of
Del Mar		 3,950 0 31.1 mi
Lake Morena's Oak Shores Mwc
 670 2 32.1 mi
Lake Morena Views Mwc
 360 1 32.6 mi
Descanso Community Water District
 870 3 32.6 mi
Santa FE I.d.
 21,539 0 33.4 mi
Ramona Municipal WD
 36,455 0 33.5 mi
Campo Hills-County Public Works Wastewtr
 500 0 33.8 mi
Rancho del Campo Water System
 290 0 33.8 mi
Heavenly Oaks
 300 1 34.4 mi
Pine Valley Trailer Park
 200 0 34.8 mi
All 82 community water systems in San Diego County
Non-community systems in San Diego County (116: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Dhs Border Patrol Hwy 94 Checkpoint
 83 2 1
South Bay Rod & Gun Club Inc.
 18,900 1 0
East County Transitional Living Center
 50 1 0
Diamond Jack's RV Ranch
 115 1 1
Skyline Ranch RV Park & Campground
 45 0 0
ND Daniel's Investment LLC
 106 0 0
Tecate Vista Mutual Water Company
 204 1 1
Tecate Supermarket
 25 0 0
Muir Industries Inc.
 70 0 0
Gsa Tecate Port of Entry
 70 1 0
Potrero Elementary School
 300 0 0
Potrero General Store
 75 0 0
EL Monte County Park
 100 0 0
Sycamore Canyon / Goodan Ranch
 50 0 0
Alpine American Legion
 100 1 0
Potrero County Park
 100 1 0
Oakoasis Open Space Preserve
 25 1 0
City of San Diego EL Capitan Reservoir
 300 0 0
Mountain Empire R.v. Park and Campground
 23 0 0
Lake Morena County Park
 300 0 0
Descanso Junction
 100 1 0
Descanso Fire Station
 34 0 0
All Saints Retreat and Formation Center
 72 2 1
City of San Diego, Camp Morena
 200 0 0
Campo Elementary School
 300 3 0
Freedom Ranch
 235 0 0
Camp Lockett Middle School
 34 1 1
San Ysidro Health Mhfm
 30 1 0
Cameron Corners
 50 0 0
Campo Group LLC
 50 0 0
Mountain Empire High School
 1,000 0 0
Caltrans, Buckman Springs Rest Area
 25 1 0
Hodges Reservoir Recreation Area
 200 0 0
Thousand Trails Oakzanita Inc.
 404 0 0
Bandy Canyon Ranch Corp
 3,564 0 0
Pine Valley Border Patrol Station
 54 0 0
Usn Camp Michael Monsoor
San Diego 		159 0 0
San Pasqual Battlefield State Park
 44 0 0
Cuyamaca SP Green Valley
 455 0 0
Questhaven Municipal Water District
 81 2 0
Cibbetts Flats Campground
 25 0 0
Cuyamaca Outdoor School
 20 0 0
Ramona Oaks RV Resort
 250 4 0
Cuyamaca SP Paso Picacho
 691 0 0
Mount Laguna Water System
 3,500 0 0
Camp Winacka
 250 0 0
Sutherland Reservoir Recreation Area
 300 1 0
The Oaks Venture, LLC
 220 0 0
Boulevard KOA Drinking Water
 50 0 0
Mount Laguna Improvement Assn.
 580 1 1
All non-community systems
About this data

Water systems are matched to San Diego County, the county this ZIP code lies in, nearest to the ZIP code's centre 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.

ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA 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.