Industrial sewage may contain significant quantities of toxic pollutants and other substances. These pollutants may interfere with the wastewater treatment system. Industries are required to provide treatment of process water to remove any such pollutants.

The City in a Pretreatment Program supervises industries. The Program regulates and monitors the discharge from industries that enter the sewer system. There are nine industries permitted by the City, Amital Spinning, Moen, Chatsworth, Hatteras Yachts, BSH Dishwasher, BSH Laundry, BSH Range, Maola Milk and Ice Cream, and Coastal Regional Solids Waste Management.