Who is regulated under the Pretreatment Program?
The Pretreatment Program applies to all Significant Industrial Users. Basically, a Significant Industrial User (SIU) is a discharger of wastewater that is subject to a Categorical Pretreatment Standard (e.g., electroplater) or who discharges an average of 25,000 gallons per day or more of process wastewater (excluding sanitary, noncontact cooling and boiler blowdown wastewater). Discharges from an SIU are controlled through a wastewater discharge permit which is issued by the Wastewater Management Division of the City of Fresno.
