How much wastewater does City Of Rio Grande City WWTP treat?

City Of Rio Grande City WWTP treats an average of 1.32 MGD and is permitted for a design flow of 1.5 MGD.

What treatment technology does City Of Rio Grande City WWTP use?

Klarifi has identified uncovered lagoons, biogas silos at the Rio Grande City facility.

What is the NPDES permit for City Of Rio Grande City WWTP?

The facility discharges under NPDES permit TX0068764, currently effective, expiring June 2029.

Is City Of Rio Grande City WWTP in compliance?

Discharge monitoring reports show 21 violations at City Of Rio Grande City WWTP in the last three years, 21 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates City Of Rio Grande City WWTP and how do I contact them?

City Of Rio Grande City WWTP is a publicly owned treatment works in Rio Grande City, Texas. Klarifi lists 1 verified decision-maker contact for this facility, available with a free trial.

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City Of Rio Grande City WWTP

Rio Grande City, TX · Starr County · Publicly Owned Treatment Works

Average flow: 1.32 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 1.32 million gallons per day against a permitted design capacity of 1.5 MGD, serving about 8,797 residents. Treatment on site includes uncovered lagoons, biogas silos. It discharges under NPDES permit TX0068764 (effective), which expires in June 2029, with 21 recorded violations in the last three years.

Treatment technology

Treatment structures identified at this facility. Exact unit counts are available in Klarifi.

Uncovered lagoons

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Biogas silos

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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.

Key contacts

1 verified contact for City Of Rio Grande City WWTP, with validated emails and direct phone numbers.

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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.

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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 September 11, 2026; facility record last updated March 16, 2025.

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