ALCOSAN is one of the region’s premier environmental and public health organizations, treating wastewater for 83 Allegheny County communities, including the City of Pittsburgh. ALCOSAN’s 59-acre treatment plant, located on Pittsburgh’s North Side, processes up to 250 million gallons of wastewater daily and is one of the largest such facilities in the Ohio River Valley.

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We are Three Rivers Proud

ALCSOAN has embarked on one of the largest public works projects in the region’s history with its $2 billion Clean Water Plan, which includes engineering and construction projects to address combined sewer overflows affecting our rivers.

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310 Service Area in Square Miles

12 Hours of Treatment Processing

250 Million Gallons of Water Plan Capacity Each Day

20000 Students Reached