San Diego, CA water quality
San Diego, CA is served by 41 public water systems, serving 1,564,983 people combined. Across those systems, we count 45 health-based violations in the last 5 years. The worst Tap Grade among them is F.
Water systems serving San Diego
SAN DIEGO, CITY OF
SAN DIEGO, CA · 1,385,379 served
NAS NORTH ISLAND & NAB CORONADO
SAN DIEGO, CA · 36,990 served
PINE VALLEY BORDER PATROL STATION
SAN DIEGO, CA · 36,604 served
SAN DIEGO MOUNTAIN LODGE
SAN DIEGO, CA · 26,641 served
DHS BORDER PATROL HWY 94 CHECKPOINT
SAN DIEGO, CA · 25,083 served
DHS BOULEVARD BORDER PATROL
SAN DIEGO, CA · 20,270 served
SOUTH BAY ROD & GUN CLUB INC.
SAN DIEGO, CA · 18,900 served
WARNER SPRINGS RANCH RESORT LLC
SAN DIEGO, CA · 4,831 served
MATAGUAY SCOUT RESERVATION
SAN DIEGO, CA · 4,000 served
WILLIAM HEISE COUNTY PARK
SAN DIEGO, CA · 850 served
USN SAN CLEMENTE ISLAND
SAN DIEGO, CA · 800 served
MOUNT LAGUNA WATER SYSTEM
SAN DIEGO, CA · 500 served
GSA TECATE PORT OF ENTRY
SAN DIEGO, CA · 400 served
AGUA CALIENTE COUNTY PARK
SAN DIEGO, CA · 400 served
BUTTERFIELD RANCH
SAN DIEGO, CA · 353 served
LAKE MORENA COUNTY PARK
SAN DIEGO, CA · 300 served
WHISPERING OAKS PROGRAM CENTER
SAN DIEGO, CA · 250 served
CAMP WINACKA
SAN DIEGO, CA · 250 served
SANTA YSABEL NATURE CENTER
SAN DIEGO, CA · 248 served
THE OAKS VENTURE, LLC
SAN DIEGO, CA · 220 served
LOUIS A. STELZER COUNTY PARK
SAN DIEGO, CA · 200 served
USN CAMP MICHAEL MONSOOR
SAN DIEGO, CA · 160 served
DHS BORDER PATROL I-8 CHECKPOINT
SAN DIEGO, CA · 160 served
JESS MARTIN COUNTY PARK
SAN DIEGO, CA · 150 served
VALLECITO COUNTY PARK
SAN DIEGO, CA · 145 served
EL MONTE COUNTY PARK
SAN DIEGO, CA · 100 served
POTRERO COUNTY PARK
SAN DIEGO, CA · 100 served
NICKEL BEER WATER COMPANY
JULIAN, CA · 100 served
SANTA MARGARITA COUNTY PRESERVE
SAN DIEGO, CA · 75 served
ALL SAINTS RETREAT AND FORMATION CENTER
SAN DIEGO, CA · 72 served
OAK GROVE COMPLEX
SAN DIEGO, CA · 68 served
FRY CREEK / OBSERVATORY
SAN DIEGO, CA · 66 served
USN SERE CAMP WARNER SPRINGS
SAN DIEGO, CA · 65 served
SYCAMORE CANYON / GOODAN RANCH
SAN DIEGO, CA · 50 served
SKYLINE RANCH RV PARK & CAMPGROUND
SAN DIEGO, CA · 45 served
SAN PASQUAL BATTLEFIELD STATE PARK
SAN DIEGO, CA · 44 served
DESCANSO FIRE STATION
SAN DIEGO, CA · 34 served
JACUMBA VALLEY RANCH WATER COMPANY
SAN DIEGO, CA · 30 served
OAKOASIS OPEN SPACE PRESERVE
SAN DIEGO, CA · 25 served
CIBBETTS FLATS CAMPGROUND
SAN DIEGO, CA · 25 served
SAN DIEGO COUNTY WATER AUTHORITY
SAN DIEGO, CA · 0 served
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Is San Diego, CA tap water safe to drink?
41 public water systems serve San Diego, CA, with 45 health-based violations in the last 5 years across them. The worst Tap Grade among them is F.
Does San Diego's water have lead in it?
The most recent 90th-percentile lead sample is 0 ppb, versus the EPA action level of 15 ppb.
Has PFAS been detected in San Diego's water?
These systems were tested under UCMR5 and no PFAS was detected above the reporting limit in the analytes we track.
Other cities in California
See all of California →Source: EPA SDWIS/ECHO · Data as of 2026Q2