CITY OF SAN MARCOS
PWSID: TX1050001 · San Marcos, TX · Serves 72,970 people
According to EPA Safe Drinking Water Information System (SDWIS), CITY OF SAN MARCOS (PWSID TX1050001) in San Marcos, TX is listed as a CWS water system covering about 72,970 people. The same extract lists 3 health-based violation records spanning 2016-2025. Those 3 health-based rows for CITY OF SAN MARCOS cover contaminants such as TTHM; they remain historical EPA registry entries, not a current compliance or drinkability score.
CITY OF SAN MARCOS has 3 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 1 distinct EPA contaminant code appears in this system's record, including TTHM. Recorded violations span 2016–2025. Day-to-day primacy enforcement for this system runs through the Texas drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Texas state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- TX1050001
- System Type
- CWS
- Water Source
- Surface Water
- Location
- San Marcos, TX
- Population Served
- 72,970
- Health Violations
- Yes (3)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| TTHM | 3 | 3 |
Violation History (3)
Frequently Asked Questions
What does EPA SDWIS list for CITY OF SAN MARCOS?
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Compare beyond Texas
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest CITY OF SAN MARCOS on cumulative violation count (3) and EPA-reported population served (72,970). Violation-count peers include Mohegan Tribal Utility Authority, RED CLIFF NORTH, Tesuque Pueblo. Population peers include BREMERTON CITY OF, RURAL LORAIN CO. WATER A, TURLOCK, CITY OF.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Similar population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ gate).
Nearby Water Systems
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About This Data
CITY OF SAN MARCOS (TX1050001) is drawn from EPA SDWIS. Nearby county systems in this extract include CITY OF KYLE; TEXAS STATE UNIVERSITY - SAN MARCOS; GOFORTH SUD; CRYSTAL CLEAR SUD. Health-based rows (3 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.