Case Study

Case Study: Increased Reliability And Reduced Costs Result In Savings Of $1 Million For ALCOSAN

Source: Emerson Process Management, Power & Water Solutions

Allegheny County Sanitary Authority (ALCOSAN) Wastewater Treatment Plant, located in Allegheny County, Pittsburgh, Pennsylvania

The Pennsylvania Department of Environmental Protection (PADEP) required ALCOSAN to prepare a comprehensive plan in accordance with requirements of the Act 537 Comprehensive Sewage Facilities Plan. Act 537 de? nes improvements to the treatment plant and sewers that will be needed in the future and presents a logical, stepwise approach for implementing a long-range master plan. Continuous modernization of the plant’s control system was an important part of meeting Act 537. ALCOSAN needed to establish an agreement with a vendor that understood their needs and could quickly respond with the right solution. The challenge was to standardize with a control system vendor that had the right technology to economically grow with the plant and accommodate operational needs.


Control and monitoring of a 200 million gallons per day (MGD)
wastewater treatment plant servicing the city of Pittsburgh and 82 neighboring municipalities

  • $1 million saved by implementing a cost-effective migration path
  • 25% reduction in chemical costs
  • 40% reduction in process air demands
  • Streamlined data management provides paperless report sharing
  • Increased reliability has allowed continuous operation since 1992
  • Improved monitoring of remote intercepter pumping stations

Emerson Process Management, Power & Water Solutions