Highway 181 South WWTP
San Antonio, TX · Bexar County · Publicly Owned Treatment Works
- Average flow
- 0.06 MGD
- Design flow
- 0.15 MGD
- NPDES permit
- TX0126969
- Effective
- Permit expires
- December 2029
- Population served
- —
- CWNS 2022
Highway 181 South WWTP is a publicly owned wastewater treatment works in San Antonio, Bexar County, Texas treating an average of 0.06 million gallons per day against a permitted design capacity of 0.15 MGD. It discharges under NPDES permit TX0126969 (effective), which expires in December 2029, with 61 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 61
- Effluent violations
- 61
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Highway 181 South WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Texas
San Antonio · 6 mi away
—
San Antonio · 6 mi away
105.32 MGD
San Antonio · 11 mi away
32 MGD
San Antonio · 13 mi away
1.72 MGD
Floresville · 14 mi away
0.68 MGD
La Vernia · 15 mi away
0.17 MGD
Converse · 16 mi away
5.81 MGD
Somerset · 19 mi away
0.11 MGD
Highway 181 South 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.