City page · Texas
San Marcos, Texas tap water
San Marcos, Texas is associated with 3 active community water system(s) in EPA SDWIS data (systems may serve multiple places or buy/sell water). The largest listed system by population served is CITY OF SAN MARCOS (72,970 people). Across those systems, this directory currently indexes 1 health-based violation record(s) in recent years. Private wells are not regulated like public systems and are not covered here.
Counties seen in EPA geo data: Guadalupe, Hays
Primary municipal water system
Texas EPA geographic extracts in this data quarter list county service areas, not city served. We feature the main City of San Marcos (or closest municipal) system first. Nearby MUDs and districts are listed separately below. Use your water bill/CCR to identify your exact PWSID.
| Utility | PWSID | Population | Primary source | Recent viol. indexed | Health-based |
|---|---|---|---|---|---|
| CITY OF SAN MARCOSPrimary | TX1050001 | 72,970 | Surface water (lakes/rivers) | 2 | 1 |
Other water systems in the area — 2 nearby MUD/district/other systems
These systems are associated with San Marcos by name/record-city heuristics or serve nearby districts. They are sorted by population served.
| Utility | PWSID | Population | Primary source | Recent viol. indexed | Health-based |
|---|---|---|---|---|---|
| TEXAS STATE UNIVERSITY - SAN MARCOS | TX1050003 | 43,552 | Groundwater (wells) | 2 | 0 |
| CRYSTAL CLEAR SUD | TX0940015 | 20,766 | Purchased surface water | 3 | 0 |
FAQs for San Marcos
Who provides tap water in San Marcos, TX?
The primary municipal system highlighted here is CITY OF SAN MARCOS (PWSID TX1050001). San Marcos may also have nearby MUDs, districts, or supply corporations; your bill or CCR names the system that serves your address.
How do I read health-based violations?
Health-based violations involve MCL, MRDL, or treatment technique issues. A past violation does not automatically mean current water is unsafe—check status, dates, and your utility’s public notices/CCR.
What about apartments or purchased water?
Some systems buy water from wholesalers. Your retail utility is still responsible for delivering finished water and issuing the CCR for customers.
Where can I get official documents?
Search your utility name + “Consumer Confidence Report”, check Texas Commission on Environmental Quality (TCEQ) drinking water resources, and use EPA’s ECHO detailed facility report links on each utility page.
EPA & data citations
- EPA ECHO SDWA Data Downloads — data dictionary & summary
- County geography from
SDWA_GEOGRAPHIC_AREAS.csv; city pages use municipal-name heuristics (Texas city-served fields are sparse) - Active community systems from
SDWA_PUB_WATER_SYSTEMS.csv - See also: Methodology