Public water system · TX1050003
ActiveTexas State University - San Marcos
At a glance
Texas State University - San Marcos (PWSID TX1050003) is an active community water system in Hays County, Texas. It reports serving 43,552 people through 2,502 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
43,552
Service connections
2,502
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Texas State University - San Marcos compare with other water systems in Hays County?
By EPA's size categories, Texas State University - San Marcos is a large system (10,001 to 100,000 people). Hays County has 118 active public water systems, and Texas State University - San Marcos is the 3rd-largest of them by population served. Its population served is about 17 times the county average of 2,597 people per system, and accounts for 14% of the 306,428 people reported by systems filed under the county. Across Texas, the 7,078 active systems average 4,789 people each. Nationally, the average active community water system reports serving 6,703 people, so Texas State University - San Marcos is about 6.5 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Texas has 4,594 active community water systems, 65% of the state's 7,078 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 5,215 Texas systems (74%) list groundwater as their primary source.
Who owns and regulates Texas State University - San Marcos?
EPA lists Texas State University - San Marcos as owned by a state government. The TX state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 2 of the 118 active systems in Hays County (1.7%) are also owned by a state government.
Does Texas State University - San Marcos have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2025. The violations listed here began between January 2015 and July 2025. By type: 6 monitoring and reporting, 2 monitoring, 2 public notice, recordkeeping or other, 1 reporting and 1 required treatment not met. The contaminant or rule involved most often is Lead and Copper Rule (7 of them). EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2018-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-09-29 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2015-09-29 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2015-07-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2015-07-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2015-04-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2015-04-01 | Required treatment not metOCCT/SOWT Study/Recommendation · code 57 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2015-01-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2015-01-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2015-01-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Texas State University - San Marcos: frequently asked questions
Who runs Texas State University - San Marcos?
Texas State University - San Marcos (PWSID TX1050003) is a community water system owned by a state government. It is regulated by the TX state drinking water program.
How many people does Texas State University - San Marcos serve?
Texas State University - San Marcos reports serving 43,552 people through 2,502 service connections in Hays County, Texas.
Where does Texas State University - San Marcos get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Texas State University - San Marcos have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2025. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Texas State University - San Marcos' water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the TX state drinking water program.
Where can I find Texas State University - San Marcos' water quality report?
As a community water system, Texas State University - San Marcos must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Hays County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of San Marcos | Hays | 72,970 | Community | Surface water |
| City of Kyle | Hays | 52,000 | Community | Purchased surface water |
| Goforth Sud | Hays | 34,893 | Community | Purchased surface water |
| County Line Sud | Hays | 19,609 | Community | Purchased surface water |
| City of Buda | Hays | 13,830 | Community | Purchased surface water |
| Dripping Springs WSC | Hays | 8,037 | Community | Purchased surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Texas State University - San Marcos, PWSID TX1050003, Texas”, https://aquacensus.com/water-systems/texas/texas-state-university-san-marcos-tx1050003 (data as of October 1, 2026).