Tapcensus

Water quality in Camp Pendleton Mainside, California

Camp Pendleton Mainside is in San Diego County. 198 active public water systems serve the county; 83 had an EPA violation in the past three years.

Most likely your provider

Camp Pendleton (south) CA3710702 · Community water system · Ground water
Serves 44,555 people Rules violated, past 3 years 0 Last sanitary survey Jun 18, 2026 Distance 2.1 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
Oceanside, City of
Oceanside		 174,340 0 5.9 mi
Fallbrook Pud
 35,237 0 8.0 mi
Rainbow Municipal WD
 23,536 0 9.7 mi
Vista Irrigation District
 134,501 0 10.0 mi
Camp Pendleton (north)
 11,576 0 10.9 mi
Carlsbad Mwd
 96,371 0 12.2 mi
Vallecitos WD
 114,700 1 14.0 mi
Valley Center Mwd
 30,166 0 16.5 mi
San Dieguito WD
 40,405 1 18.0 mi
Rincon del Diablo Mwd (id-1)
 28,427 0 18.6 mi
Pauma Valley Water Company
 185 5 18.6 mi
Rancho Estates Mutual Water Co.
 200 0 19.4 mi
Rancho Pauma Mutual WC
 899 1 19.7 mi
Olivenhain Mwd
 86,458 0 19.9 mi
Escondido, City of
Escondido		 137,044 0 20.0 mi
Del Dios Mutual Water Company
 330 3 20.3 mi
Yuima Municipal Water District
 360 0 20.4 mi
Yuima Municipal Water District Ida
 693 0 20.4 mi
Lazy H Mutual Water Company
 117 0 20.9 mi
Lake Wohlford Resort
 250 0 21.3 mi
Santa FE I.d.
 21,539 0 21.4 mi
Oakvale Park
 260 3 21.7 mi
Rincon del Diablo Mwd (id-A)
 5,016 0 23.0 mi
Del Mar, City of
Del Mar		 3,950 0 24.1 mi
Palomar Mountain Mutual Water Co.
 150 1 26.4 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
Santa Margarita County Preserve
 75 0 0
Fallbrook Kamp Retreat
 24 0 0
Questhaven Municipal Water District
 81 2 0
Daley Ranch
 200 0 0
Hodges Reservoir Recreation Area
 200 0 0
Palomar Mtn. SP Doane Valley
 131 0 0
Palomar Mtn. SP Silvercrest
 143 0 0
San Pasqual Battlefield State Park
 44 0 0
Oak Knoll Village
 66 1 0
Fry Creek / Observatory
 660 0 0
Bandy Canyon Ranch Corp
 3,564 0 0
Yoga Center Mother's Kitchen
 101 0 0
Yoga Center Retreat
 201 0 0
Rey River Ranch Corp.
 12 0 0
Camp Denver Fox
 86 1 1
Oak Grove Complex
 68 0 0
Sycamore Canyon / Goodan Ranch
 50 0 0
Sutherland Reservoir Recreation Area
 300 1 0
Ramona Oaks RV Resort
 250 4 0
San Diego Mountain Lodge
 26,641 3 0
Oakoasis Open Space Preserve
 25 1 0
The Oaks Venture, LLC
 220 0 0
Warner Springs Ranch Resort LLC
 32 2 1
Warner Unified School District
 250 1 0
Auerbach Farms
 68 0 0
Mataguay Scout Reservation
 4,000 1 0
EL Monte County Park
 100 0 0
Santa Ysabel Nature Center
San Diego 		248 0 0
Spencer Valley School District
 40 2 0
Apple Water IS Good
 25 1 0
Calvary Chapel Julian
 101 1 0
City of San Diego EL Capitan Reservoir
 300 0 0
Camp Winacka
 250 0 0
Sacred Mountain Inn
 30 1 0
Camp Cedar Glen
 65 1 0
Julian Oaks Camp
 72 0 0
Jess Martin County Park
 150 1 0
Nickel Beer Water Company
San Diego 		100 0 0
William Heise County Park
 850 1 0
Alpine American Legion
 100 1 0
Pinecrest
 70 0 0
Whispering Winds Catholic Conference Cen
 164 0 0
Pinezanita Inc.
 400 0 0
KQ Ranch Resort
 400 0 0
Cuyamaca SP Paso Picacho
 691 0 0
Diamond Jack's RV Ranch
 115 1 1
Skyline Ranch RV Park & Campground
 45 0 0
Descanso Fire Station
 34 0 0
Cuyamaca Outdoor School
 20 0 0
Cuyamaca SP Green Valley
 455 0 0
All non-community systems
About this data

Water systems are matched to San Diego County, nearest to Camp Pendleton Mainside 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.