What is defined as any discernible, confined, and discrete conveyance discharging storm water into surface waters?

The correct answer is that a point source discharge is defined as any discernible, confined, and discrete conveyance that discharges stormwater into surface waters. This definition is critical in environmental regulation, particularly under laws such as the Clean Water Act.

A point source discharge refers specifically to any identifiable source of pollution, including pipes, ditches, or channels which directly convey stormwater to rivers, lakes, or other water bodies. The discernibility and confinement of the discharge are key elements—these criteria ensure that the source can be located and regulated, which is essential for managing water quality and protecting aquatic ecosystems.

The other options, while related to water discharge terminology, do not capture the defined parameters of the question adequately. A general discharge point lacks the specificity of being discernible and confined, which could refer to broader areas rather than specific conveyances. A stormwater outlet may refer to a location where stormwater is released but does not necessarily embody the regulatory definition of a point source. Lastly, water quality discharge is too vague and does not reflect the distinct, confined nature required to meet the definition of point source discharge. Thus, point source discharge is the most accurate term in this context.