ALCOSAN has embarked on a comprehensive, $2 billion, long-term Clean Water Plan that will significantly reduce the overflows of diluted, untreated wastewater into the region’s rivers; thus, significantly improving the water quality of our local waterways. More specifically, the Clean Water Plan will:
Get the details of our Clean Water Plan and consent decree.
See how ALCOSAN’s responsibilities have expanded.
View maps of regional waterways and sewer system infrastructure.
Know when it’s safe to enter the region's waterways.
We are expanding our plant's treatment capacity
Learn more about our Green Revitalization of Our Waterways (GROW) Program.
Understand changes that are under consideration to accommodate flow.
It is estimated that nine (9) billion gallons of overflow enter our rivers and streams during heavy rain and snowmelt events. ALCOSAN’s Clean Water Plan will reduce the overflow by approximately seven (7) billion gallons.
The Clean Water Plan is our blueprint to address the water quality in the rivers and streams across our service territory, as directed by our Consent Decree.
The Consent Decree spells out what ALCOSAN must do to comply with the Clean Water
Act by reducing combined sewer overflows.
Learn more about the Clean Water Plan and the Modified Consent Decree
The Plan is designed to be affordable, flexible enough to adapt to evolving technology and regional in scale.
The overall cost was reduced and the timetable extended to 2036 – protecting customers from rate increases beyond their ability to pay.
The Plan first considers green stormwater infrastructure to better identify future system capacity needs.
Take a look at green infrastructure projects
Learn about Preliminary Planning
The plan extends ALCOSAN’s responsibilities for maintenance – reducing the burden on municipalities.
9 Billion Gallons of Overflow
7 Billion Gallons of Overflow to be Reduced
600 Gallons to be Treated Per Day by 2028
22 Million in GROW Grants Distributed