City Of Ennis Wastewater Treatment Plant
Ennis, TX · Ellis County · Publicly Owned Treatment Works
- Average flow
- 3.45 MGD
- Design flow
- 4 MGD
- NPDES permit
- TX0047261
- Effective
- Permit expires
- July 2028
- Population served
- 21,124
- CWNS 2022
City Of Ennis Wastewater Treatment Plant is a publicly owned wastewater treatment works in Ennis, Ellis County, Texas treating an average of 3.45 million gallons per day against a permitted design capacity of 4 MGD, serving about 21,124 residents. Treatment on site includes clarifiers, uncovered lagoons, biosolids drying, disinfection, chlorine/ chloramine, filtration and other unit processes. It discharges under NPDES permit TX0047261 (effective), which expires in July 2028, with 6 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Uncovered lagoons
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Biosolids Drying
unit processDisinfection, chlorine/ chloramine
unit processFiltration
unit processFlow Equalization
unit processPrimary Clarification or Sedimentation
unit processSuspended Growth, Aerobic
unit processSuspended Growth, Anaerobic
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Compliance snapshot (last 3 years)
- Total violations
- 6
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
31 verified contacts for City Of Ennis Wastewater Treatment Plant, with validated emails and direct phone numbers.
Unlock 31 verified contacts (28 more than shown)
Names, validated emails and direct phone numbers for decision-makers at City Of Ennis Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Texas
Ennis · 3 mi away
0.23 MGD
Palmer · 9 mi away
0.25 MGD
Blooming Grove · 15 mi away
0.09 MGD
Italy · 17 mi away
0.21 MGD
Corsicana · 19 mi away
3.79 MGD
Frost · 19 mi away
0.05 MGD
Red Oak · 20 mi away
4.6 MGD
Scurry · 20 mi away
0.0013 MGD
City Of Ennis Wastewater Treatment Plant: 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 April 12, 2025.