Controlling substances entering the sewer or stormwater at their origin. Often used to prevent potentially hazardous substances from entering the sewer. Fitzroy River Water's source control program for industrial and commercial customers is known as the Trade Waste Policy.

A practice, method, or technology that is used to reduce pollution from a source; for example, best management practices or end-of-pipe treatment.

The process of identifying and managing sources of contamination to waterway sediments. For sources to the Lower Duwamish Waterway Superfund Site, this process is explained in the Lower Duwamish Waterway Source Control Strategy.

The control of runoff or pollution at or near its source.

A practice, method, or technology used to reduce pollution from a source before it enters the wastewater stream. Source control focuses on reducing or eliminating contaminants before they enter the sewer system rather than treating them after they have been mixed with other wastes.