CITY OF SAN MARCOS
Texas — Community Water System — PWSID: TX1050001
System Information
| PWSID | TX1050001 |
| System Name | CITY OF SAN MARCOS |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 06 |
| Serves School | No |
| Wholesaler | Yes |
| First Reported | Mar 14, 1980 |
| Last Reported | Mar 31, 2026 |
Location & Contact
| State | Texas |
| City | SAN MARCOS |
| ZIP Code | 78666-6314 |
| Address | 630 E HOPKINS ST |
| Organization | REYES, STEPHANIE L, |
| Phone | 512-393-8107 |
Population & Service
| Population Served | 72,970 |
| Service Connections | 42,746 |
Drinking Water Violations (38)
This water system has 38 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 1, 2025 | Dec 31, 2025 | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Archived | Dec 31, 2025 | — | |
| Oct 1, 2025 | Dec 31, 2025 | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Archived | Dec 31, 2025 | — | |
| Oct 1, 2025 | Dec 31, 2025 | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Archived | Dec 31, 2025 | — | |
| Feb 1, 2021 | Feb 28, 2021 | MR | No | Yes | — | 1.0 mg/L | — | Resolved | Feb 28, 2021 | — | |
| Feb 1, 2021 | Feb 28, 2021 | MR | No | Yes | — | 1.0 mg/L | — | Resolved | Feb 28, 2021 | — | |
| Feb 1, 2021 | Feb 28, 2021 | MR | No | Yes | — | 1.0 mg/L | — | Resolved | Feb 28, 2021 | — | |
| Feb 1, 2021 | Feb 28, 2021 | MR | No | Yes | — | 1.0 mg/L | — | Resolved | Feb 28, 2021 | — | |
| May 18, 2016 | — | Other | No | No | — | — | — | Resolved | May 19, 2016 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MCL | Yes | No | .082 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2016 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MCL | Yes | No | .082 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2016 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MCL | Yes | No | .082 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2016 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MCL | Yes | No | .082 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2016 | — | |
| Dec 30, 2015 | — | MR | No | No | — | TT | — | Resolved | Feb 17, 2016 | — | |
| Dec 30, 2015 | — | MR | No | No | — | TT | — | Resolved | Feb 17, 2016 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MCL | Yes | No | .086 MG/L | 0.080 mg/L | .08 | Resolved | Sep 30, 2014 | — | |
| Jul 1, 2014 | Sep 30, 2014 | MCL | Yes | No | .086 MG/L | 0.080 mg/L | .08 | Resolved | Sep 30, 2014 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2014 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2014 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2014 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2014 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2014 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MCL | Yes | No | .081 MG/L | 0.080 mg/L | .08 | Resolved | Jun 30, 2014 | — | |
| Mar 30, 2014 | — | Other | No | No | — | — | — | Resolved | Jun 11, 2014 | — | |
| Mar 30, 2014 | — | Other | No | No | — | — | — | Resolved | Jun 11, 2014 | — | |
| Jan 1, 2014 | Mar 31, 2014 | MCL | Yes | No | .086 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2014 | — | |
| Jan 1, 2014 | Mar 31, 2014 | MCL | Yes | No | .086 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2014 | — | |
| Jan 1, 2014 | Mar 31, 2014 | MCL | Yes | No | .086 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2014 | — | |
| Jan 1, 2014 | Mar 31, 2014 | MCL | Yes | No | .086 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2014 | — | |
| Jan 1, 2014 | Mar 31, 2014 | MCL | Yes | No | .086 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2014 | — | |
| Jan 1, 2014 | Mar 31, 2014 | MCL | Yes | No | .086 MG/L | 0.080 mg/L | .08 | Resolved | Mar 31, 2014 | — | |
| Oct 1, 2013 | Dec 31, 2013 | MCL | Yes | No | .087 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2013 | — | |
| Oct 1, 2013 | Dec 31, 2013 | MCL | Yes | No | .087 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2013 | — | |
| Oct 1, 2013 | Dec 31, 2013 | MCL | Yes | No | .087 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2013 | — | |
| Oct 1, 2013 | Dec 31, 2013 | MCL | Yes | No | .087 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2013 | — | |
| Oct 1, 2013 | Dec 31, 2013 | MCL | Yes | No | .087 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2013 | — | |
| Oct 1, 2013 | Dec 31, 2013 | MCL | Yes | No | .087 MG/L | 0.080 mg/L | .08 | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2003 | Jan 31, 2003 | TT | Yes | No | — | — | — | Resolved | Jan 31, 2003 | — | |
| Jan 1, 2003 | Jan 31, 2003 | TT | Yes | No | — | — | — | Resolved | Jan 31, 2003 | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.