Upper Martinez Creek WWTF
San Antonio, TX · Bexar County · Publicly Owned Treatment Works
- Average flow
- 0.06 MGD
- Design flow
- 0.27 MGD
- NPDES permit
- LA0020508
- Effective
- Permit expires
- July 2031
- Population served
- 1,543
- CWNS 2022
Upper Martinez Creek WWTF is a publicly owned wastewater treatment works in San Antonio, Bexar County, Texas treating an average of 0.06 million gallons per day against a permitted design capacity of 0.27 MGD, serving about 1,543 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit LA0020508 (effective), which expires in July 2031, with 117 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 117
- Effluent violations
- 111
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
25 verified contacts for Upper Martinez Creek WWTF, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Upper Martinez Creek WWTF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Texas
Karnack · 13 mi away
0.0075 MGD
Waskom · 21 mi away
0.3 MGD
Jefferson · 22 mi away
1.01 MGD
Bloomburg · 26 mi away
—
Linden · 27 mi away
0.04 MGD
Atlanta · 27 mi away
1.27 MGD
Queen City · 29 mi away
0.19 MGD
Avinger · 35 mi away
0.03 MGD
Upper Martinez Creek WWTF: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated April 7, 2025.