City Of Rio Grande City WWTP
N Bank Of Rio Grande,0.5Mi Up-, Rio Grande City, TX 78582 · Starr County · Publicly Owned Treatment Works
- Average flow
- 1.27 MGD
- Design flow
- 1.5 MGD
- NPDES permit
- TX0068764
- Effective
- Permit expires
- June 2029
- Population served
- 8,797
- CWNS 2022
City Of Rio Grande City WWTP is a publicly owned wastewater treatment works in Rio Grande City, Starr County, Texas treating an average of 1.27 million gallons per day against a permitted design capacity of 1.5 MGD, serving about 8,797 residents. It discharges under NPDES permit TX0068764 (effective), which expires in June 2029, with 21 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in June 2026.
Treatment technology
2 treatment structures and unit processes identified at City Of Rio Grande City WWTP.
Available with a free Klarifi account
See the full treatment train at City Of Rio Grande City WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 21
- Effluent violations
- 21
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 City Of Rio Grande City WWTP in EPA's ICIS system.
- Formal actions
- 1
- 1 since FY2020
- EPA inspections
- 0
- none on record
Latest case · Jun 2026
Rio Grande City WWTF Administrative Order
Administrative order · CWA, NPDES Permit Violations · Final Order Issued
EPA's description of the case:
“EPA Region 6 has issued an Administrative Order (AO) under its authority pursuant to Section 309 of the Clean Water Act to the City of Rio Grande - Rio Grand City Wastewater Treatment Facility - in…”
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Source: EPA ECHO, civil enforcement case 06-2026-1807.
Full case history with a free Klarifi account
Every action against City Of Rio Grande City WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
1 verified contact for City Of Rio Grande City WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at City Of Rio Grande City WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Texas
Roma · 10 mi away
1.37 MGD
Sullivan City · 19 mi away
0.21 MGD
La Joya · 23 mi away
0.26 MGD
Penitas · 27 mi away
0.31 MGD
Penitas · 30 mi away
—
Zapata · 33 mi away
0.0055 MGD
Mission · 34 mi away
9.06 MGD
Mcallen · 39 mi away
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City Of Rio Grande City 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 March 16, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms