Martinez Iv WWTP
1961 Graytown Road, San Antonio, TX 78283 · Bexar County · Publicly Owned Treatment Works
- Average flow
- 3.03 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 3.03 million gallons per day against a permitted design capacity of 1.5 MGD, serving about 10,000 residents. It discharges under NPDES permit TX0129861 (administratively continued), which expires in July 2026, with 10 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in October 2023.
Treatment technology
One treatment structure or unit process identified at Martinez Iv WWTP.
Available with a free Klarifi account
See the full treatment train at Martinez Iv WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 10
- Effluent violations
- 10
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Martinez Iv WWTP in EPA's ICIS system.
- Formal actions
- 1
- 1 since FY2020
- Compliance actions
- $6,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Oct 2023
San Antonio River Authority
Administrative order · CWA, NPDES Permit Violations · Unilateral Administrative Order Without Adjudication · Compliance actions $6,000
EPA's description of the case:
“The Administrative Order issued to San Antonio River Authority for permit effluent violations. The order request submittal of corrective action plan.”
Source: EPA ECHO, civil enforcement case 06-2021-1727.
Full case history with a free Klarifi account
Every action against Martinez Iv WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
40 verified contacts for Martinez Iv WWTP, with validated emails and direct phone numbers.
Unlock 40 verified contacts (37 more than shown)
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
7.15 MGD
Schertz · 7 mi away
10.39 MGD
Seguin · 10 mi away
—
Marion · 11 mi away
0.13 MGD
La Vernia · 11 mi away
0.2 MGD
San Antonio · 12 mi away
0.0028 MGD
San Antonio · 13 mi away
0.06 MGD
San Antonio · 15 mi away
—
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 October 26, 2026; facility record last updated April 12, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · WWTP · Biosolids · all terms