City Of Mathis WWTF
Mathis, TX · San Patricio County · Publicly Owned Treatment Works
- Average flow
- 0.42 MGD
- Design flow
- 0.95 MGD
- NPDES permit
- TX0020419
- Effective
- Permit expires
- September 2030
- Population served
- 6,702
- CWNS 2022
City Of Mathis WWTF is a publicly owned wastewater treatment works in Mathis, San Patricio County, Texas treating an average of 0.42 million gallons per day against a permitted design capacity of 0.95 MGD, serving about 6,702 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit TX0020419 (effective), which expires in September 2030, with 2 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at City Of Mathis WWTF.
No verified contacts on file yet
Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.
Nearby wastewater treatment plants in Texas
Orange Grove · 12 mi away
0.14 MGD
Edroy · 14 mi away
0.03 MGD
Odem · 20 mi away
0.39 MGD
Banquete · 21 mi away
0.07 MGD
Beeville · 21 mi away
2.88 MGD
Sinton · 21 mi away
0.0035 MGD
George West · 22 mi away
0.33 MGD
Agua Dulce · 23 mi away
0.03 MGD
City Of Mathis 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 January 27, 2025.