Sebastian Mud WWTF
1M W. US Hwy 77 And 1/3M S. St Hwy, Sebastian, TX 78594 · Willacy County · Publicly Owned Treatment Works
- Average flow
- 0.1 MGD
- Design flow
- 0.23 MGD
- NPDES permit
- TX0113000
- Expired
- Permit expires
- July 2026
- Population served
- —
- CWNS 2022
Sebastian Mud WWTF is a publicly owned wastewater treatment works in Sebastian, Willacy County, Texas treating an average of 0.1 million gallons per day against a permitted design capacity of 0.23 MGD. It discharges under NPDES permit TX0113000 (expired), which expires in July 2026, with 16 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Sebastian Mud WWTF.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 16
- Effluent violations
- 16
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
3 verified contacts for Sebastian Mud WWTF, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Sebastian Mud WWTF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Texas
Lyford · 5 mi away
—
Santa Rosa · 6 mi away
0.27 MGD
La Villa · 8 mi away
0.12 MGD
Raymondville · 10 mi away
1.26 MGD
Edcouch · 10 mi away
0.1 MGD
Elsa · 13 mi away
0.54 MGD
Mercedes · 14 mi away
2.21 MGD
La Feria · 14 mi away
0.8 MGD
Sebastian Mud 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 October 26, 2026; facility record last updated April 11, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Filter press · FOG · all terms