How much wastewater does Grassy Branch WWTP treat?

Grassy Branch WWTP is permitted for a design flow of 0.05 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does Grassy Branch WWTP use?

Klarifi has identified uncovered lagoons at the Monroe facility.

What is the NPDES permit for Grassy Branch WWTP?

The facility discharges under NPDES permit NC0085812, currently administratively continued, expiring October 2023.

Is Grassy Branch WWTP in compliance?

Discharge monitoring reports show 22 violations at Grassy Branch WWTP in the last three years, 22 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Grassy Branch WWTP and how do I contact them?

Grassy Branch WWTP is a publicly owned treatment works in Monroe, North Carolina. Klarifi lists 2 verified decision-maker contacts for this facility, available with a free trial.

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Grassy Branch WWTP

Monroe, NC · Union County · Publicly Owned Treatment Works

Average flow: —

Design flow: 0.05 MGD

NPDES permit: NC0085812; Administratively continued

Permit expires: October 2023

Population served: 1,600; CWNS 2022

Grassy Branch WWTP is a publicly owned wastewater treatment works in Monroe, Union County, North Carolina, serving about 1,600 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit NC0085812 (administratively continued), which expires in October 2023, with 22 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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Compliance snapshot (last 3 years)

Total violations: 22

Effluent violations: 22

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

Key contacts

2 verified contacts for Grassy Branch WWTP, with validated emails and direct phone numbers.

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

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Twelve Mile Creek WWTP

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Norwood WWTP

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Irwin Creek Wastewater Treatment Plant

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Badin WWTP

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Mount Holly WWTP

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Town Of Mooresville

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Grassy Branch 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 September 2, 2025.

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