How much wastewater does Weslaco South WWTP treat?

Weslaco South WWTP treats an average of 1.76 MGD and is permitted for a design flow of 2.5 MGD.

What treatment technology does Weslaco South WWTP use?

Klarifi has identified clarifiers, carrousels / oxidation ditches at the Weslaco facility.

What is the NPDES permit for Weslaco South WWTP?

The facility discharges under NPDES permit TX0116394, currently administratively continued, expiring March 2026.

Is Weslaco South WWTP in compliance?

Discharge monitoring reports show 8 violations at Weslaco South WWTP in the last three years, 8 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Weslaco South WWTP and how do I contact them?

Weslaco South WWTP is a publicly owned treatment works in Weslaco, Texas. Klarifi lists 13 verified decision-maker contacts for this facility, available with a free trial.

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Weslaco South WWTP

Weslaco, TX · Hidalgo County · Publicly Owned Treatment Works

Average flow: 1.76 MGD

Design flow: 2.5 MGD

NPDES permit: TX0116394; Administratively continued

Permit expires: March 2026

Population served: 13,890; CWNS 2022

Weslaco South WWTP is a publicly owned wastewater treatment works in Weslaco, Hidalgo County, Texas treating an average of 1.76 million gallons per day against a permitted design capacity of 2.5 MGD, serving about 13,890 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit TX0116394 (administratively continued), which expires in March 2026, with 8 recorded violations in the last three years.

Treatment technology

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

Clarifiers

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Carrousels / oxidation ditches

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Compliance snapshot (last 3 years)

Total violations: 8

Effluent violations: 8

Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.

Key contacts

13 verified contacts for Weslaco South WWTP, with validated emails and direct phone numbers.

Unlock 13 verified contacts (10 more than shown)

Names, validated emails and direct phone numbers for decision-makers at Weslaco South WWTP, plus the full compliance history and discharge data.

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Weslaco South 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 February 26, 2025.

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