Mountain Creek Reg WWTP
Midlothian, TX · Ellis County · Publicly Owned Treatment Works
- Average flow
- 4.2 MGD
- Design flow
- 4.5 MGD
- NPDES permit
- TX0025011
- Effective
- Permit expires
- January 2028
- Population served
- 24,829
- CWNS 2022
Mountain Creek Reg WWTP is a publicly owned wastewater treatment works in Midlothian, Ellis County, Texas treating an average of 4.2 million gallons per day against a permitted design capacity of 4.5 MGD, serving about 24,829 residents. Treatment on site includes clarifiers. It discharges under NPDES permit TX0025011 (effective), which expires in January 2028, with 0 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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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
Decision-makers at Mountain Creek Reg WWTP.
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Nearby wastewater treatment plants in Texas
Midlothian · 7 mi away
0.0042 MGD
Red Oak · 11 mi away
4.6 MGD
Burleson · 13 mi away
0.0029 MGD
Maypearl · 14 mi away
—
Alvarado · 14 mi away
0.6 MGD
Keene · 18 mi away
0.48 MGD
Grandview · 19 mi away
0.08 MGD
Joshua · 20 mi away
0.55 MGD
Mountain Creek Reg 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 April 11, 2025.