How much wastewater does Rayville WWTF treat?

Rayville WWTF treats an average of 1.05 MGD and is permitted for a design flow of 1.5 MGD.

What treatment technology does Rayville WWTF use?

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

What is the NPDES permit for Rayville WWTF?

The facility discharges under NPDES permit LA0020559, currently effective, expiring May 2028.

Is Rayville WWTF in compliance?

Discharge monitoring reports show 180 violations at Rayville WWTF in the last three years, 81 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Rayville WWTF and how do I contact them?

Rayville WWTF is a publicly owned treatment works in Rayville, Louisiana. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Rayville WWTF

Rayville, LA · Richland County · Publicly Owned Treatment Works

Average flow: 1.05 MGD

Design flow: 1.5 MGD

NPDES permit: LA0020559; Effective

Permit expires: May 2028

Population served: 3,781; CWNS 2022

Rayville WWTF is a publicly owned wastewater treatment works in Rayville, Richland County, Louisiana treating an average of 1.05 million gallons per day against a permitted design capacity of 1.5 MGD, serving about 3,781 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit LA0020559 (effective), which expires in May 2028, with 180 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: 180

Effluent violations: 81

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

Key contacts

Decision-makers at Rayville WWTF.

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Rayville WWTF: 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 24, 2025.

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