How much wastewater does South Cobb WRF treat?

South Cobb WRF treats an average of 24.28 MGD and is permitted for a design flow of 40 MGD.

What treatment technology does South Cobb WRF use?

Klarifi has identified clarifiers, biogas silos at the Mableton facility.

What is the NPDES permit for South Cobb WRF?

The facility discharges under NPDES permit GA0026158, currently effective, expiring June 2027.

Is South Cobb WRF in compliance?

Discharge monitoring reports show 3 violations at South Cobb WRF in the last three years, 3 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates South Cobb WRF and how do I contact them?

South Cobb WRF is a publicly owned treatment works in Mableton, Georgia. Klarifi lists 3 verified decision-maker contacts for this facility, available with a free trial.

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South Cobb WRF

Mableton, GA · Cobb County · Publicly Owned Treatment Works

Average flow: 24.28 MGD

Design flow: 40 MGD

NPDES permit: GA0026158; Effective

Permit expires: June 2027

Population served: 241,714; CWNS 2022

South Cobb WRF is a publicly owned wastewater treatment works in Mableton, Cobb County, Georgia treating an average of 24.28 million gallons per day against a permitted design capacity of 40 MGD, serving about 241,714 residents. Treatment on site includes clarifiers, biogas silos. It discharges under NPDES permit GA0026158 (effective), which expires in June 2027, with 3 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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Biogas silos

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Compliance snapshot (last 3 years)

Total violations: 3

Effluent violations: 3

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

Key contacts

3 verified contacts for South Cobb WRF, with validated emails and direct phone numbers.

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

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Nearby wastewater treatment plants in Georgia

Douglasville-Douglas County Water & Sewerage Authority (sweetwater Creek Wpcp)

Douglasville · 7 mi away

2 MGD

Fulton County Department Of Public Works (big Creek Wrf)

Roswell · 18 mi away

16.8 MGD

Villa Rica, City Of (north Sweetwater Wpcp)

Villa Rica · 20 mi away

0.33 MGD

Dekalb County Department Of Watershed Management (snapfinger Creek Awtf)

Decatur · 20 mi away

30.42 MGD

Palmetto, City Of (palmetto Wtp)

Palmetto · 20 mi away

0.01 MGD

Cobb County Water System (northwest Wrf)

Marietta · 20 mi away

5.9 MGD

Fulton County - Johns Creek Environmental Campus

Alpharetta · 21 mi away

8.2 MGD

Paulding County Water System (upper Sweetwater Wrf)

Villa Rica · 21 mi away

0.14 MGD

South Cobb WRF: 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 4, 2025.

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