point-source pollutant

A point-source pollutant is a contaminant that enters a body of water from a single, identifiable source, such as a pipe or channel. This is in contrast to nonpoint-source pollution, which originates from broad, unconfined areas like agricultural runoff.123

Water pollution occurs when substances or energy are released into water bodies, interfering with their beneficial use or natural ecosystem functions. These pollutants can include chemicals, trash, microorganisms, radioactivity, or heat. Point sources, like sewage outfalls or industrial discharge pipes, are generally easier to control because the pollution is concentrated at one location where it can be treated. However, dispersed sources, such as urban stormwater runoff carrying oil and deicing chemicals, contribute significantly to the overall pollution problem and are more difficult to manage.42