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.

Learn more about what we do.

Wastewater Treatment

We treat wastewater to remove harmful pollution.

Environmental Compliance

We adhere and enforce all permit requirements to protect public health and the environment.

Governmental Affairs

We coordinate with service area municipalities and government agencies and officials.

System Operations & Maintenance

We keep the plant running smoothly 24/7.

Engineering & Construction

We manage, plan, design and construct infrastructure projects.

Administration

We safeguard Authority assets including personnel and the physical plant.

Regional Conveyance

We manage and maintain the sewer system serving 83 municipalities.

Communications

We educate and inform the public about the work ALCOSAN performs.

We are Three Rivers Proud

ALCOSAN 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.

Read Our Plan

310 Service Area in Square Miles

12 Hours of Treatment Processing

250 Million Gallons of Water Plan Capacity Each Day

20000 Students Reached