Northwest Wastewater Treatment Plant

The Northwest Wastewater Treatment Plant treats all the wastewater from the western portion of Carbondale. The facility also receives industrial wastewater from the Bicentennial Industrial Park, Carbondale Industrial Park and the industrial transfer sewer. The industrial wastewater is initially processed at the industrial pre-treatment plant and then its effluent is discharged into and treated in the domestic plant. All the effluent is discharged to the Big Muddy River or used to irrigate the Hickory Ridge Golf Course.


In Fiscal Year 2014, the Northwest Wastewater Treatment Plant met and exceeded the standards set forth by the State and Federal National Pollution Discharge Elimination System (NPDES) Permit as issued by the Illinois Environmental Protection Agency (IEPA). The treatment facility has continued to maintain a high removal rate on the Biochemical Oxygen Demand (B.O.D) and Suspended Solids (S.S.)

During Fiscal Year 2014, the second year of a multi-year Sanitary Sewer Inflow and Infiltration Study (CIP #SS1301) was completed. The purpose of this intensive study is to identify major and minor sources of sanitary sewer inflow and infiltration; reducing significant inflow and infiltration should help reduce operational costs of the Northwest Wastewater Treatment plant.


Airation & Digester Basins

Original Drying Beds

Primary Clarifers and Grit Chamber

Drying Beds

Final Clarifier

Anarobic Digester,Original Plant Bldg

New Railing Contract Panel FY2013

Trickling Filter Replaced FY2014

Ultra Violet Disinfection Unit


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