Muddy Creek Regional WWTP
Wylie, TX · Collin County · Publicly Owned Treatment Works
- Average flow
- 9.67 MGD
- Design flow
- 20 MGD
- NPDES permit
- TX0123561
- Effective
- Permit expires
- August 2030
- Population served
- 47,088
- CWNS 2022
Muddy Creek Regional WWTP is a publicly owned wastewater treatment works in Wylie, Collin County, Texas treating an average of 9.67 million gallons per day against a permitted design capacity of 20 MGD, serving about 47,088 residents. It discharges under NPDES permit TX0123561 (effective), which expires in August 2030, with 11 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
- 11
- Effluent violations
- 11
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Muddy Creek Regional WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Texas
Garland · 5 mi away
22.38 MGD
Rockwall County · 6 mi away
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Wylie · 7 mi away
0.19 MGD
Rockwall · 9 mi away
0.48 MGD
Mc Kinney · 10 mi away
70.77 MGD
Richardson · 11 mi away
2.53 MGD
Wylie · 14 mi away
4.96 MGD
Josephine · 16 mi away
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Muddy Creek Regional 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 March 2, 2025.