Steep Bank/flat Bank WWTP
2300' SE Intx Oilfield Rd &, Missouri City, TX 77459 · Fort Bend County · Publicly Owned Treatment Works
- Average flow
- 5.07 MGD
- Design flow
- 6 MGD
- NPDES permit
- TX0114855
- Effective
- Permit expires
- February 2030
- Population served
- 22,224
- CWNS 2022
Steep Bank/flat Bank WWTP is a publicly owned wastewater treatment works in Missouri City, Fort Bend County, Texas treating an average of 5.07 million gallons per day against a permitted design capacity of 6 MGD, serving about 22,224 residents. It discharges under NPDES permit TX0114855 (effective), which expires in February 2030, with 69 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in August 2025.
Treatment technology
2 treatment structures and unit processes identified at Steep Bank/flat Bank WWTP.
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See the full treatment train at Steep Bank/flat Bank WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 69
- Effluent violations
- 68
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Steep Bank/flat Bank WWTP in EPA's ICIS system.
- Formal actions
- 1
- 1 since FY2020
- Compliance actions
- $550,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Aug 2025
Missouri City, City of
Administrative order · CWA, NPDES Permit Violations · Unilateral Administrative Order Without Adjudication · Compliance actions $550,000
EPA's description of the case:
“On August 19, 2025, EPA Region 6 issued an Administrative Order (AO) under its authority pursuant to Section 309 of the Clean Water Act to Missouri City WWTF. The AO was issued in response to…”
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Source: EPA ECHO, civil enforcement case 06-2025-1778.
Full case history with a free Klarifi account
Every action against Steep Bank/flat Bank WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
3 verified contacts for Steep Bank/flat Bank WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Steep Bank/flat Bank WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Texas
Sugar Land · 1 mi away
6.41 MGD
Missouri City · 2 mi away
0.39 MGD
Missouri City · 2 mi away
2.78 MGD
Stafford · 4 mi away
4.31 MGD
Fresno · 4 mi away
1.4 MGD
Missouri City · 4 mi away
0.44 MGD
Sugar Land · 5 mi away
6.09 MGD
Missouri City · 5 mi away
1.32 MGD
Steep Bank/flat Bank 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 October 26, 2026; facility record last updated May 29, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms