South Laredo WWTP
Laredo, TX · Webb County · Publicly Owned Treatment Works
- Average flow
- 16.98 MGD
- Design flow
- 18 MGD
- NPDES permit
- TX0085316
- Effective
- Permit expires
- June 2031
- Population served
- 263,966
- CWNS 2022
South Laredo WWTP is a publicly owned wastewater treatment works in Laredo, Webb County, Texas treating an average of 16.98 million gallons per day against a permitted design capacity of 18 MGD, serving about 263,966 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit TX0085316 (effective), which expires in June 2031, 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.
Capital improvement projects in Laredo
Laredo's capital improvement plan lists 74 water, sewer and wastewater line items worth $846M starting 2025–2029. The largest budgeted items are shown here.
All water and sewer capital projects in Laredo →
| Project | Budget | Years |
|---|---|---|
| South Laredo WWTP exp to 24 mgd | $138,000,000 | 2027–2028 |
| NLWWTP 3 MGD Expansion-District 6 | $74,750,000 | 2027–2029 |
| Zacate Creek WWTP Reconstruction | $44,300,000 | 2027–2029 |
| Expansion of North Laredo WWTP | $44,300,000 | 2027–2029 |
| Manadas Expansion to 9.5 MGD | $43,500,000 | 2027–2028 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
Decision-makers at South Laredo WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Texas
Laredo · 4 mi away
16.21 MGD
Laredo · 5 mi away
0.62 MGD
Laredo · 6 mi away
0.05 MGD
Laredo · 6 mi away
0.28 MGD
Laredo · 10 mi away
2.51 MGD
Laredo · 23 mi away
0.003 MGD
Zapata · 41 mi away
1 MGD
Zapata · 51 mi away
0.0068 MGD
South Laredo 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 September 5, 2025.