Technically speaking, ALCOSAN only has 83 customers, the municipalities that rely on us to treat their wastewater and transform it from dirty to clean; but, within those municipalities, nearly 900,000 people rely on our services.  

Who and Where We Serve

To do so, ALCOSAN maintains approximately 90 miles of interceptor sewers that convey wastewater from municipal sewer systems to ALCOSAN’s 59-acre treatment plant on Pittsburgh’s North Side.  The service area extends over 310 square miles and provides wastewater treatment to 83 municipalities, including the city of Pittsburgh.  

The Service Map below identifies the individual customer municipalities in the ALCOSAN service area.  See the Our Customers section of the website for additional details.