Walnut Creek WWTP
Austin, TX · Travis County · Publicly Owned Treatment Works
- Average flow
- 56.6 MGD
- Design flow
- 100 MGD
- NPDES permit
- TX0046981
- Administratively continued
- Permit expires
- March 2025
- Population served
- 400,000
- CWNS 2022
Walnut Creek WWTP is a publicly owned wastewater treatment works in Austin, Travis County, Texas treating an average of 56.6 million gallons per day against a permitted design capacity of 100 MGD, serving about 400,000 residents. Treatment on site includes clarifiers, uncovered lagoons. It discharges under NPDES permit TX0046981 (administratively continued), which expires in March 2025, with 0 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
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Walnut Creek WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Walnut Creek WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Texas
Austin · 6 mi away
1.09 MGD
Del Valle · 6 mi away
43.8 MGD
Manor · 8 mi away
1.18 MGD
Austin · 9 mi away
0.34 MGD
Austin · 9 mi away
0.11 MGD
Pflugerville · 10 mi away
4.95 MGD
Manor · 11 mi away
0.11 MGD
Austin · 15 mi away
0.03 MGD
Walnut Creek 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 February 28, 2025.