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South Milwaukee WWTP Upgrade

City of South Milwaukee, Wisconsin

Waste Management
Facilities planning, Design, Construction administration and inspection, O&M manual/startup, Clean Water Fund financing

Project Location: South Milwaukee, Wisconsin

Design Capacity:  6.0 mgd

Construction Cost:  $20 million


The South Milwaukee WWTP serves a population of 21,000, with a discharge of treated effluent to Lake Michigan. The plant, which had undergone numerous expansions in the past, was faced with new regulations pertaining to biosolids and phosphorus, as well as aging infrastructure. The City hired ATI to prepare a facilities plan for the future development of the plant on a restricted site. The plan resulted in a series of phased projects that boosted plant peak flow capacity and increased reliability.



UV effluent disinfection building
Emergency generator
Secondary treatment upgrade
Fine screening
Operations building addition
Sludge storage tank
Anaerobic digestion upgrade
Septage receiving station