Martinez Iv WWTP
San Antonio, TX · Bexar County · Publicly Owned Treatment Works
- Average flow
- 1.72 MGD
- Design flow
- 1.5 MGD
- NPDES permit
- TX0129861
- Administratively continued
- Permit expires
- July 2026
- Population served
- 10,000
- CWNS 2022
Martinez Iv WWTP is a publicly owned wastewater treatment works in San Antonio, Bexar County, Texas treating an average of 1.72 million gallons per day against a permitted design capacity of 1.5 MGD, serving about 10,000 residents. Treatment on site includes clarifiers. It discharges under NPDES permit TX0129861 (administratively continued), which expires in July 2026, with 9 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Compliance snapshot (last 3 years)
- Total violations
- 9
- Effluent violations
- 9
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
40 verified contacts for Martinez Iv WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Martinez Iv WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Texas
Converse · 5 mi away
5.81 MGD
Schertz · 7 mi away
8.42 MGD
Marion · 11 mi away
0.04 MGD
La Vernia · 11 mi away
0.17 MGD
San Antonio · 12 mi away
0.0015 MGD
San Antonio · 13 mi away
0.06 MGD
San Antonio · 15 mi away
—
San Antonio · 18 mi away
105.32 MGD
Martinez Iv WWTP: 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 12, 2025.