Industrial Pretreatment Program
The Industrial Pretreatment Program controls toxic, conventional, and non-conventional pollutants from non-domestic sources discharging into the wastewater system to prevent pass through and interference of the publicly owned treatment works (POTW).
Significant Industrial Users (SIU)
An SIU is any discharger to the POTW that:
- Is subject to Categorical Pretreatment Standards
- Discharges 25,000 or more gallons per day of process water (excluding sanitary, non-contact cooling and boiler blow down wastewater)
- Contributes 5% or more of the average dry weather hydraulic or organic capacity of the POTW.
- Has a reasonable potential for adversely affecting the POTW.
Permitting
All non-domestic users connected to, or connecting to, or discharging to the POTW must complete a non-domestic user survey to collect information of the facility to determine if the facility is classified as a significant industrial user (SIU) and require a permit. Non-domestic users deemed SIUs must then apply for a wastewater discharge permit which specifies discharge standards and conditions.
Send permit applications via email to IPP@grcity.us
Dental Dischargers Report
Do you operate a dental facility in the sanitary sewer service area? If your facility is within the green shaded area of the map below, you will need to submit a one-time compliance report for dental dischargers. If you are unsure if your facility is in the sanitary sewer service area, contact 311 or call 616.456.3000. Please click the button below the map to complete the form.
Sanitary Sewer Service Area (shaded green)
Contact Us
Phone
311 or 616-456-3000
Email
esd@grcity.us
Location
Water Resource Recovery Facility
1300 Market Ave SW
Grand Rapids, MI 49503
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