San Antonio Water Quality
Texas
According to EPA SDWIS, San Antonio, Texas is served by 19 community water systems covering about 2,703,047 people. The same extract lists 16 health-based violation records, most recently coded 5200 in 2024. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in San Antonio, Texas is delivered through 19 EPA-regulated community water systems serving an estimated 2,703,047 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 16 violation records across the 19 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 4 distinct EPA contaminant codes: LEAD AND COPPER RULE REVISIONS, Revised Total Coliform Rule, Lead and Copper Rule, Fluoride. 63 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Texas drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| SAN ANTONIO WATER SYSTEM | 2,643,729 | 0 | Clean |
| JBSA SAM HOUSTON | 37,563 | 2 | Health |
| JBSA RANDOLPH | 10,949 | 2 | Health |
| CITY OF ALAMO HEIGHTS | 7,357 | 1 | Health |
| THE OAKS WSC | 1,191 | 0 | Clean |
| BLUE SKIES OF TEXAS WEST | 796 | 1 | Health |
| PIONEER ESTATES | 320 | 1 | Health |
| CADILLAC WATER | 252 | 0 | Clean |
| RIO MEDINA ESTATES | 201 | 2 | Health |
| SRALLA MOBILE HOME PARK | 165 | 1 | Health |
| MARTINEZ RANCH SUBDIVISION | 150 | 1 | Health |
| LITTLE JOES ICE HOUSE & TRAILER PARK | 106 | 0 | Clean |
| RANCHERO ESTATES | 105 | 1 | Health |
| SHADY MEADOWS MOBILE HOME PARK | 64 | 2 | Health |
| EVETTS APARTMENTS | 51 | 1 | Health |
| CORDI MARIAN VILLA | 48 | 1 | Health |
| CENTRAL TEXAS REGIONAL WSC | 0 | 0 | Clean |
| SEGURO WATER | 0 | 0 | Clean |
| SAN PEDRO WATER RESOURCES | 0 | 0 | Clean |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| MARTINEZ RANCH SUBDIVISION | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| RIO MEDINA ESTATES | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| RIO MEDINA ESTATES | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| RANCHERO ESTATES | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| SRALLA MOBILE HOME PARK | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| SHADY MEADOWS MOBILE HOME PARK | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| BLUE SKIES OF TEXAS WEST | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| PIONEER ESTATES | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| CORDI MARIAN VILLA | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| EVETTS APARTMENTS | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| CITY OF ALAMO HEIGHTS | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| SHADY MEADOWS MOBILE HOME PARK | Revised Total Coliform Rule | 2023-08-19 |
| JBSA SAM HOUSTON | Lead and Copper Rule | 2023-01-28 |
| JBSA SAM HOUSTON | Lead and Copper Rule | 2023-01-28 |
| JBSA RANDOLPH | Fluoride | 2018-01-01 |
| JBSA RANDOLPH | Fluoride | 2017-10-01 |
What are San Antonio's health-based records for?
San Antonio's health-based violation records carry 4 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Lead and Copper Rule Revisions | 11 | 10 |
| Fluoride | 2 | 1 |
| Lead and Copper Rule | 2 | 1 |
| Revised Total Coliform Rule | 1 | 1 |
TRI Facilities in San Antonio
| Facility | Total Releases |
|---|---|
| Calaveras Power Station | 2.0M lbs |
| Toyota Motor Manufacturing Texas | 354.9K lbs |
| US Dod Usaf Camp Bullis Ranges | 234.0K lbs |
| The San Antonio Refinery LLC | 159.8K lbs |
| Azz Galvanizing - San Antonio | 100.5K lbs |
| Towerjazz Texas | 86.1K lbs |
| Toyoda Gosei Texas | 60.5K lbs |
| Capitol Aggregates Inc. | 40.6K lbs |
| Alamo Marble Ltd | 32.8K lbs |
| Clarios Llc. San Antonio Dc | 32.2K lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in San Antonio, Texas? ▼
How many water violations does San Antonio have in this EPA extract? ▼
What contaminants were found in San Antonio water? ▼
How many water systems serve San Antonio? ▼
Where does San Antonio get its drinking water? ▼
Are there pollution sources near San Antonio? ▼
How does San Antonio compare in Texas?
Of the 1,232 Texas places with at least one community water system on file, San Antonio ranks #17 by number of systems (19).
Either side of it: The Woodlands (21), Willis (21), Keene (18), Canyon Lake (17)
About This Data
Figures here are the current EPA SDWIS extract joined to the 19 community water systems whose service area lists San Antonio, ranked against the 1,232 Texas places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.