Is SAN ANTONIO WATER SYSTEM's water safe to drink?
SAN ANTONIO WATER SYSTEM has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 2,643,729 people get their water from it, across 881,243 connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, SAN ANTONIO WATER SYSTEM ranks 7,758th by violation burden (40th percentile) - 23 violations total, 1 health-based.
Against the TX average
SAN ANTONIO WATER SYSTEM's 1 health-based violations sit within the TX average of 6.7, across 1,633 systems statewide. See the lead and copper guide for why lead counts differently.
Most recent violation on record
SAN ANTONIO WATER SYSTEM's most recent violation on record is dated 2016-10-06, with the most recent health-based one dated 2005-01-12. Last reported to EPA: 06/26/2026.
The concern categories on record
SAN ANTONIO WATER SYSTEM's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Microbial contamination / treatment technique - flagged from: Coliform (TCR)
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What SAN ANTONIO WATER SYSTEM's record does not cover
Everything on this page is SAN ANTONIO WATER SYSTEM's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Between the utility's meter and SAN ANTONIO WATER SYSTEM's customers' taps is household plumbing, invisible to a system-level record ranked 7,758th of 12,903 by violation count. The guide to what this data misses covers that gap.