Industrial / SIUs
Significant Industrial Users (SIU)- includes
- All categorical industrial users, and
- Any noncategorical industrial user that
- Discharges 25,000 gallons per day or more of process wastewater excluding sanitary, noncontact cooling water and boiler blow down wastewaters
- Contributes a process wastestream which makes up five percent or more of the average dry weather hydraulic or organic (BOD, TSS) capacity of a treatment plant, or
- Has a reasonable potential, in the opinion of the Control or Approval Authority, to adversely affect the POTW treatment plant (inhibition, pass-through of pollutants, sludge contamination, or endangerment of POTW workers)