Terrell Unit WWTP
1300 Fm 655, Rosharon, TX 77583 · Brazoria County · Publicly Owned Treatment Works
- Average flow
- 1.75 MGD
- Design flow
- 2 MGD
- NPDES permit
- TX0115169
- Effective
- Permit expires
- July 2030
- Population served
- —
- CWNS 2022
Terrell Unit WWTP is a publicly owned wastewater treatment works in Rosharon, Brazoria County, Texas treating an average of 1.75 million gallons per day against a permitted design capacity of 2 MGD. It discharges under NPDES permit TX0115169 (effective), which expires in July 2030, with 9 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in October 2014.
Treatment technology
2 treatment structures and unit processes identified at Terrell Unit WWTP.
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See the full treatment train at Terrell Unit WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 9
- Effluent violations
- 9
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 Terrell Unit WWTP in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Compliance actions
- $5,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Oct 2014
Texas Dept. of Criminal Justice
Administrative order · CWA, NPDES Permit Violations · Unilateral Administrative Order Without Adjudication · Compliance actions $5,000
EPA's description of the case:
“The Texas Department of Criminal Justice, located in Huntsville, Texas was issued Administrative Order 06-2014-1882 for effluent violations. The facility is required to submit an corrective action…”
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Source: EPA ECHO, civil enforcement case 06-2014-1882.
Full case history with a free Klarifi account
Every action against Terrell Unit WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at Terrell Unit WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Texas
Iowa Colony · 10 mi away
0.33 MGD
Angleton · 11 mi away
4.43 MGD
Rosharon · 12 mi away
0.59 MGD
West Columbia · 12 mi away
2.31 MGD
Danbury · 12 mi away
0.51 MGD
Brazoria County · 13 mi away
0.45 MGD
Brazoria County · 13 mi away
0.94 MGD
Rosharon · 14 mi away
0.2 MGD
Terrell Unit 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 November 29, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms