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Wastewater from industrial processes poses a significant threat to water quality and aquatic wildlife:
Proper "pretreatment" of a waste stream before it is discharged to the City's sanitary sewer system prevents these problems.
Currently, there are approximately 25 Significant Industrial Users (SIUs) which discharge industrial wastewater into Shreveport's sanitary sewer system. Numerous restaurants also discharge their greywater into the sanitary sewer system.
Each of these users has a permit issued by the City that allows the discharge, provided that certain requirements are met (including regular monitoring, reporting, and proper operation of the pretreatment system).
Generally, industrial dischargers to the sanitary sewer system (including restaurants and food preparation facilities) must receive a permit from the City.
"Permitted" facilities are required to have tests run on their wastewater by independent labs at stated intervals and must report the results of the tests to the City.
The City of Shreveport Pretreatment staff visits the permitted businesses without warning from time to time to sample the wastewater being discharged. These samples are also tested to make sure the permit is not being violated.
The City's Pretreatment Staff is responsible for reporting monitoring results regularly to the Louisiana Department of Environmental Quality.