Industrial Waste or Trade Waste

This liquid waste is generated by industries, small businesses, and commercial enterprises; it may be discharged to a sewer provided it has the approval of a regulating authority. Some industrial waste may require pretreatment before it can be discharged into the sewer system, while other industrial and commercial wastewaters (such as medical and dental wastewater) are explicitly excluded. Controlling the release of harmful chemicals into the wastewater collection system is known as source control.