Harris Co Mud 387 WWTP
25810 1/2 Gosling Rd, Spring, TX 77389 · Harris County · Publicly Owned Treatment Works
- Average flow
- 2.38 MGD
- Design flow
- 3 MGD
- NPDES permit
- TX0124907
- Effective
- Permit expires
- November 2027
- Population served
- —
- CWNS 2022
Harris Co Mud 387 WWTP is a publicly owned wastewater treatment works in Spring, Harris County, Texas treating an average of 2.38 million gallons per day against a permitted design capacity of 3 MGD. It discharges under NPDES permit TX0124907 (effective), which expires in November 2027, with 39 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in December 2024.
Treatment technology
One treatment structure or unit process identified at Harris Co Mud 387 WWTP.
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See the full treatment train at Harris Co Mud 387 WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 39
- Effluent violations
- 34
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 Harris Co Mud 387 WWTP in EPA's ICIS system.
- Formal actions
- 2
- 1 since FY2020
- Compliance actions
- $1,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Dec 2024
Harris County MUD No 387 WWTP
Administrative order · CWA, NPDES Permit Violations · Final Order Issued
EPA's description of the case:
“On, December 11, 2024 EPA Region 6 issued an Administrative Order (AO) under its authority pursuant to Section 309 of the Clean Water Act to the Harris County MUD No. 387 Wastewater Treatment Plant.…”
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Source: EPA ECHO, civil enforcement case 06-2025-1703.
Full case history with a free Klarifi account
Every action against Harris Co Mud 387 WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at Harris Co Mud 387 WWTP.
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Nearby wastewater treatment plants in Texas
Houston · 2 mi away
1.3 MGD
Houston · 2 mi away
0.22 MGD
Houston · 2 mi away
0.25 MGD
Spring · 3 mi away
0.17 MGD
Houston · 3 mi away
0.34 MGD
Houston · 3 mi away
0.96 MGD
The Woodlands · 4 mi away
4.78 MGD
The Woodlands · 4 mi away
4.49 MGD
Harris Co Mud 387 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 · Activated sludge · Oxidation ditch · all terms