Tapcensus

Water quality for ZIP code 91916

ZIP 91916 covers Descanso 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

Descanso Community Water District CA3710009 · Community water system · Ground water
Serves 870 people Rules violated, past 3 years 3 Unresolved 1 Distance 2.0 mi
View system details EPA facility report

Other community water systems in San Diego County

81 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Heavenly Oaks
 300 1 3.9 mi
Pine Valley Trailer Park
 200 0 4.7 mi
LA Cima Fire Center
 60 0 6.0 mi
Pine Valley Bible Conference Center
 50 0 6.1 mi
Guatay Mutual Benefit Corporation
 100 4 6.8 mi
Pine Valley Mutual WC
 2,574 1 6.8 mi
Willowside Terrace Water Association
 100 2 6.8 mi
Cuyamaca Water District
 160 0 7.6 mi
Alpine Oaks Estates LLC
 185 0 7.8 mi
North Peak Mutual Water Company
 294 0 8.5 mi
H & J Water Company
 86 1 10.8 mi
Pine Hills Mutual Water Company
 380 2 11.0 mi
Richardson Beardsley Park Inc.
 30 1 11.5 mi
Laguna Mountain Mutual Water Co.
 100 0 11.8 mi
Butterfield Ranch
 350 2 12.4 mi
Majestic Pines Community SD
 1,768 1 13.0 mi
Julian Community Services District
 617 3 13.2 mi
Camp Stevens
 28 1 13.8 mi
Wynola Water District
 140 2 14.7 mi
Padre Dam Mwd
 93,980 0 14.8 mi
Lake Morena's Oak Shores Mwc
 670 2 15.6 mi
Lake Morena Views Mwc
 360 1 15.9 mi
Rancho Santa Teresa MW Co.
 102 2 16.2 mi
Sunrise Estates Mutual Water Company
 150 2 16.6 mi
Lakeside WD
 35,500 1 17.6 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
Descanso Fire Station
 34 0 0
Thousand Trails Oakzanita Inc.
 404 0 0
All Saints Retreat and Formation Center
 72 2 1
Descanso Junction
 100 1 0
Cuyamaca SP Green Valley
 455 0 0
Cuyamaca Outdoor School
 20 0 0
Cuyamaca SP Paso Picacho
 691 0 0
Alpine American Legion
 100 1 0
Mount Laguna Water System
 3,500 0 0
City of San Diego EL Capitan Reservoir
 300 0 0
Camp Winacka
 250 0 0
Whispering Winds Catholic Conference Cen
 164 0 0
William Heise County Park
 850 1 0
Mount Laguna Improvement Assn.
 580 1 1
Pinezanita Inc.
 400 0 0
KQ Ranch Resort
 400 0 0
Pinecrest
 70 0 0
Caltrans, Buckman Springs Rest Area
 25 1 0
Cibbetts Flats Campground
 25 0 0
Jess Martin County Park
 150 1 0
Mountain Empire High School
 1,000 0 0
Anza Borrego SP Vallecito
 31 0 0
EL Monte County Park
 100 0 0
Nickel Beer Water Company
San Diego 		100 0 0
City of San Diego, Camp Morena
 200 0 0
Sacred Mountain Inn
 30 1 0
Julian Oaks Camp
 72 0 0
Skyline Ranch RV Park & Campground
 45 0 0
Calvary Chapel Julian
 101 1 0
Lake Morena County Park
 300 0 0
Apple Water IS Good
 25 1 0
Spencer Valley School District
 40 2 0
The Oaks Venture, LLC
 220 0 0
Santa Ysabel Nature Center
San Diego 		248 0 0
Oakoasis Open Space Preserve
 25 1 0
Pine Valley Border Patrol Station
 54 0 0
Camp Cedar Glen
 65 1 0
Diamond Jack's RV Ranch
 115 1 1
Auerbach Farms
 68 0 0
Stagecoach Trails RV Resort
 600 2 0
Vallecito County Park
 145 1 0
Ramona Oaks RV Resort
 250 4 0
Sutherland Reservoir Recreation Area
 300 1 0
Freedom Ranch
 235 0 0
Campo Elementary School
 300 3 0
Agua Caliente County Park
 400 0 0
Potrero County Park
 100 1 0
Usn Camp Michael Monsoor
San Diego 		159 0 0
Potrero Elementary School
 300 0 0
Dhs Border Patrol Hwy 94 Checkpoint
 83 2 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.