To best treat wastewater, we have to know what's flowing into our system.
Our Industrial Pretreatment Program controls the release of pollutants into the wastewater system by monitoring the discharge of significant industrial users (SIU(Show info)).
All non-domestic users of the Grand Rapids Sanitary Sewer Service Area, including contributing jurisdictions, are required to complete and submit a non-domestic user survey to collect information on wastewater characteristics, chemical inventory, and pretreatment devices. Facilities that are SIUs must then apply for a discharge permit to specify discharge standards, limits and conditions.