CITY OF SAN MARCOS Water Quality Report
Population
72,970
people served
Water Source
🌊 Surface
rivers, lakes, reservoirs
National Rank
Top 90%
of 49,184 US systems
5-Year Record
⚠️ 3
violations recorded
C
Fair
Safety Grade
3 violations in the past 5 years, including 2 health-based
System Details
- PWSID
- TX1050001
- Population Served
- 72,970
- Water Source
- Surface Water
- Owner
- Local Government
- State
- Texas
- EPA Region
- 6
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Contaminant 7500 | ⚠ Monitoring/Reporting | 3 |
| Contaminant 5000 | ⚠ Monitoring/Reporting | 2 |
| Total Trihalomethanes (TTHMs) | ✕ Health-Based | 2 |
| Bromate | ⚠ Monitoring/Reporting | 3 |
Violation History
2021
3
2016
4
2015
2
2014
1
Total violations on record: 10
Service Area
Cities Served
ZIP Codes Served
Recommended Water Filters
Based on contaminants detected in this water system:
Activated Carbon Filter
Effective for chlorine, THMs, pesticides, and taste/odor improvement
Removes: Total Trihalomethanes (TTHMs)
How does this compare?
This systemNational average
Grade C
Avg: B-C
10violations total
36% of national average
National avg: ~28 per system
🏙️ This is a large system — serving 11× more people than the national average.