How much wastewater does South Lyon WWTP treat?

South Lyon WWTP treats an average of 0.97 MGD.

What treatment technology does South Lyon WWTP use?

Klarifi has identified clarifiers, aerated lagoons at the South Lyon facility.

What is the NPDES permit for South Lyon WWTP?

The facility discharges under NPDES permit MI0020273, currently effective, expiring October 2028.

Is South Lyon WWTP in compliance?

Discharge monitoring reports show 11 violations at South Lyon WWTP in the last three years, 4 of them effluent limit exceedances. The full history is available in Klarifi.

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

South Lyon WWTP is a publicly owned treatment works in South Lyon, Michigan. Klarifi lists 3 verified decision-maker contacts for this facility, available with a free trial.

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South Lyon WWTP

South Lyon, MI · Oakland County · Publicly Owned Treatment Works

Average flow: 0.97 MGD

Design flow: —

NPDES permit: MI0020273; Effective

Permit expires: October 2028

Population served: 10,229; CWNS 2022

South Lyon WWTP is a publicly owned wastewater treatment works in South Lyon, Oakland County, Michigan treating an average of 0.97 million gallons per day, serving about 10,229 residents. Treatment on site includes clarifiers, aerated lagoons. It discharges under NPDES permit MI0020273 (effective), which expires in October 2028, with 11 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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Aerated lagoons

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Compliance snapshot (last 3 years)

Total violations: 11

Effluent violations: 4

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 Lyon WWTP, with validated emails and direct phone numbers.

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

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South Lyon 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 March 20, 2025.

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