General Information

Conventional Activated Sludge Plant Secondary Treatment Facility

Service Area
Granite City, Madison, Venice, Pontoon Beach, Glen Carbon, Brooklyn, Chouteau Township, Nameoki Township, Washington Park, Fairmont City.

Design Criteria
90% B.O.D. Removal 90% T.S.S. Removal

Design Dry Weather Flow
23 MGD Stormwater System

Design Wet Weather Flow
195 MGD Stormwater System 34.5 MGD Secondary Plant

230 MGD Total Combined

Population Equivalent 1997
Based on : B.O.D. = 102,340
Based on T.S.S. = 104,022
Significant Industrial Dischargers = 23

Measured Treatment Efficiency 1997
98.6% Removal B.O.D.
98.2% Removal T.S.S

Average Flow
Dry weather 12.82 MGD

Wet weather 263.1 million gallons total
38 storm events
6.9 million gallons average/event

WWTP Facilities - View a flow diagram of the treatment plant