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Each year, approximately 9 billion gallons of wastewater overflow into our region’s waterways. Because of that, ALCOSAN is not in compliance with the federal Clean Water Act.
To fix this, ALCOSAN has started a $2 billion, long-term, Clean Water Plan that will reduce the amount of combined sewage overflow by 7 billion gallons per year and eliminate sanitary sewage overflows. To achieve this, ALCOSAN’s plan involves
four major components:
Regionalization - ALCOSAN is working with municipalities to take ownership of trunk sewers and related facilities to create a streamlined collection system.
Plant Expansion - The Clean Water Plan calls for ALCOSAN's Northside plant to expand. This additional capacity will help reduce the number of overflows caused by excess stormwater.
Regional Tunnel System -ALCOSAN will construct a new regional tunnel system, and related infrastructure, to transport more wastewater flows during rain events to the treatment plant. This will help reduce overflows.
GROW/Source Control - ALCOSAN created the Green Revitalization of Our Waterways (GROW) program in an effort to reduce excess water from entering an already overloaded sewer collection system.
Clean Water Plan Timeline
Regionalization will more than double ALCOSAN’s sewer system ownership and maintenance responsibilities in the region.
Miles of Sewer
Wet weather control facilities
Learn how ALCOSAN is working with municipalities to take ownership of trunk sewers and related facilities to create a streamlined system.