City Of Wallis-Plant - 6810 Marek Street
Wallis, TX · Austin County · Publicly Owned Treatment Works
- Average flow
- 0.18 MGD
- Design flow
- 0.5 MGD
- NPDES permit
- TX0025968
- Effective
- Permit expires
- September 2029
- Population served
- 1,389
- CWNS 2022
City Of Wallis-Plant - 6810 Marek Street is a publicly owned wastewater treatment plant in Wallis, Austin County, Texas treating an average of 0.18 million gallons per day against a permitted design capacity of 0.5 MGD, serving about 1,389 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit TX0025968 (effective), which expires in September 2029, with 27 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 27
- Effluent violations
- 12
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 Wallis-Plant - 6810 Marek Street.
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Nearby wastewater treatment plants in Texas
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0.04 MGD
Orchard · 6 mi away
0.09 MGD
East Bernard · 7 mi away
0.4 MGD
Katy · 9 mi away
0.26 MGD
Fulshear · 11 mi away
0.17 MGD
Fulshear · 12 mi away
1.11 MGD
Brookshire · 13 mi away
0.84 MGD
Fulshear · 13 mi away
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City Of Wallis-Plant - 6810 Marek Street: 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 March 14, 2025.