What is the term for the natural or artificial waterway used to remove waste and storm water?

The term "sewer" refers specifically to a natural or artificial system designed for the transportation of waste materials, including both sewage and stormwater. Sewers play a crucial role in public health and environmental management by providing a controlled method for the removal and disposal of waste from residential, commercial, and industrial areas. They are typically underground systems that include pipes, drains, and treatment facilities to ensure that waste is transported efficiently and disposed of in a safe manner.

While "drain" might seem similar, it is more general and typically refers to a pipe or channel that allows water to flow away from an area, often used for less complex situations such as directing stormwater. A "gutter" refers to a shallow trough along the edge of a street or road designed to collect rainwater, primarily for surface runoff rather than waste. "Conduit" is a more generic term that describes a channel for conveying fluids or electrical wiring but does not specifically pertain to wastewater management.

Thus, the definition and purpose of "sewer" solidly encompass the effective transportation of waste and stormwater, making it the correct terminology for the described waterway system.