How much wastewater does City Of Mason WWTP treat?

City Of Mason WWTP treats an average of 0.24 MGD and is permitted for a design flow of 0.35 MGD.

What treatment technology does City Of Mason WWTP use?

Klarifi has identified aerated lagoons, uncovered lagoons at the Mason facility.

What is the NPDES permit for City Of Mason WWTP?

The facility discharges under NPDES permit TX0071111, currently administratively continued, expiring May 2025.

Is City Of Mason WWTP in compliance?

Discharge monitoring reports show 35 violations at City Of Mason WWTP in the last three years, 15 of them effluent limit exceedances. The full history is available in Klarifi.

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

City Of Mason WWTP is a publicly owned treatment works in Mason, Texas. Klarifi lists 2 verified decision-maker contacts for this facility, available with a free trial.

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City Of Mason WWTP

Mason, TX · Mason County · Publicly Owned Treatment Works

Average flow: 0.24 MGD

Design flow: 0.35 MGD

NPDES permit: TX0071111; Administratively continued

Permit expires: May 2025

Population served: 2,114; CWNS 2022

City Of Mason WWTP is a publicly owned wastewater treatment works in Mason, Mason County, Texas treating an average of 0.24 million gallons per day against a permitted design capacity of 0.35 MGD, serving about 2,114 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit TX0071111 (administratively continued), which expires in May 2025, with 35 recorded violations in the last three years.

Treatment technology

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

Aerated lagoons

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Uncovered lagoons

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Compliance snapshot (last 3 years)

Total violations: 35

Effluent violations: 15

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

Key contacts

2 verified contacts for City Of Mason 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 Mason WWTP, plus the full compliance history and discharge data.

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City Of Mason 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 April 11, 2025.

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