Plant Operations

Plant Specifications 

  • Built in 1975
  • Major Upgrade completed in 2021
  • Design Capacity: 4.5 million gallons per day (MGD)
  • Mode of Treatment: Activated Sludge
  • (1)  Three million gallon Equalization Cell
  • (2)  Three million gallon Treatment Cells
  • (2)  Two million gallon Sludge Storage Cells
  • (2)   375,000 gallon secondary clarifiers
  • (1)   200,000 Chlorine Contact tank
  • (2)  300 hp Centrifugal Blowers
  • (2)  200 hp Centrifugal Blowers
  • (2)  125 hp Positive Displacement Blowers
  • 48 hour average detention time
LUDINGTON WWTP-097


Biological Treatment 
Reduces concentrations of:

  • Ammonia Nitrogen (NH3-N)
  • Biological Oxygen Demand (BOD)
  • Suspended Solids (SS)

Secondary Treatment System

  • Chemical treatment
  • Ferric Chloride used to remove phosphorus, chlorine used for coliform control
  • Two 375,000 gallon capacity up flow clarifiers for phosphorus, suspended solids removal

System Components

  • 65 miles of sanitary sewer lines
  • 11 pumping stations.
  • 11 additional pumping stations owned/operated by Pere Marquette Township, Mason County DPW, City of Scottville and Tamarac Village Mobil Home Park also pump sewage to the Ludington WWTP