San Antonio, TX water quality
San Antonio, TX is served by 52 public water systems, serving 2,723,150 people combined. Across those systems, we count 68 health-based violations in the last 5 years. The worst Tap Grade among them is C.
Water systems serving San Antonio
SAN ANTONIO WATER SYSTEM
SAN ANTONIO, TX · 2,643,729 served
JBSA SAM HOUSTON
SAN ANTONIO, TX · 37,563 served
JBSA RANDOLPH
SAN ANTONIO, TX · 10,949 served
CITY OF ALAMO HEIGHTS
SAN ANTONIO, TX · 7,357 served
SOUTHWEST ISD MAIN
SAN ANTONIO, TX · 5,364 served
SOUTHWEST TEXAS METHODIST HOSPITAL
SAN ANTONIO, TX · 3,005 served
SOUTHWEST RESEARCH INST
SAN ANTONIO, TX · 2,700 served
JBSA BULLIS
SAN ANTONIO, TX · 1,500 served
THE OAKS WSC
SAN ANTONIO, TX · 1,191 served
METHODIST SPECIALTY HOSPITAL
SAN ANTONIO, TX · 983 served
NATURAL BRIDGE CAVERNS
SAN ANTONIO, TX · 900 served
BLUE SKIES OF TEXAS WEST
SAN ANTONIO, TX · 796 served
LAS PALAPAS TEX MEX CAFE
SAN ANTONIO, TX · 640 served
COSA EISENHOWER PARK
SAN ANTONIO, TX · 600 served
OUR LADY OF THE LAKE UNIVERSITY
SAN ANTONIO, TX · 550 served
SAN ANTONIO ROSE PALACE
SAN ANTONIO, TX · 500 served
TX BIOMEDICAL RESEARCH INSTITUTE
SAN ANTONIO, TX · 400 served
BIGS 107
SAN ANTONIO, TX · 366 served
PIONEER ESTATES
SAN ANTONIO, TX · 320 served
B B R WATER
SAN ANTONIO, TX · 260 served
CADILLAC WATER
SAN ANTONIO, TX · 252 served
TEMPLE OF PRAISE
SAN ANTONIO, TX · 250 served
SAINT ANTHONY CATHOLIC HIGH SCHOOL
SAN ANTONIO, TX · 250 served
WAGON WHEEL RV PARK
SAN ANTONIO, TX · 234 served
KINGDOM HALL OF JEHOVAHS WITNESSES
SAN ANTONIO, TX · 225 served
NATL BRIDGE WILDLIFE RANCH
SAN ANTONIO, TX · 200 served
VINTAGE AIR
SAN ANTONIO, TX · 185 served
SCREAMING GOAT YARD & TAP
SAN ANTONIO, TX · 170 served
SPECHT STORE
SAN ANTONIO, TX · 170 served
KIDDIE KOOP DAY CARE CENTER
SAN ANTONIO, TX · 160 served
ALAMO CEMENT
SAN ANTONIO, TX · 130 served
CAPITOL CEMENT
SAN ANTONIO, TX · 121 served
LITTLE JOES ICE HOUSE & TRAILER PARK
SAN ANTONIO, TX · 106 served
BULVERDE METHODIST CHURCH
SAN ANTONIO, TX · 100 served
LOS PATIOS
SAN ANTONIO, TX · 100 served
LITTLE LIONS LEARNING ACADEMY
SAN ANTONIO, TX · 100 served
CENTURY REGIONAL HEALTH CARE
SAN ANTONIO, TX · 100 served
CHRISTIANSON AIR CONDITIONING & PLUMBING
SAN ANTONIO, TX · 75 served
CACTUS AND BRUSH
SAN ANTONIO, TX · 70 served
ADOBE VILLAGE
SAN ANTONIO, TX · 66 served
LEON SPRINGS BUSINESS PARK
SAN ANTONIO, TX · 60 served
EVETTS APARTMENTS
SAN ANTONIO, TX · 51 served
CORDI MARIAN VILLA
SAN ANTONIO, TX · 48 served
SAN ANTONIO PACKING
SAN ANTONIO, TX · 40 served
ALAMO 1
SAN ANTONIO, TX · 34 served
BULVERDE CROSSING
SAN ANTONIO, TX · 30 served
GOLL STREET PROPERTIES
SAN ANTONIO, TX · 25 served
HEB EMERGENCY HAULING
SAN ANTONIO, TX · 25 served
WATERFLEET WATER HAULER WFWH21004
SAN ANTONIO, TX · 25 served
BIG COUNTRY 207
SAN ANTONIO, TX · 25 served
WATERFLEET WATER HAULER WFWH21003
SAN ANTONIO, TX · 25 served
WATERFLEET WATER HAULER WFWH22007
SAN ANTONIO, TX · 25 served
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Is San Antonio, TX tap water safe to drink?
52 public water systems serve San Antonio, TX, with 68 health-based violations in the last 5 years across them. The worst Tap Grade among them is C.
Does San Antonio's water have lead in it?
The most recent 90th-percentile lead sample is 2.8 ppb, versus the EPA action level of 15 ppb.
Has PFAS been detected in San Antonio'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 Texas
See all of Texas →Source: EPA SDWIS/ECHO · Data as of 2026Q2