Question

which is a characteristic of point sources of discharges of pollutants to waterways? they come from a wide variety of unconstrained or unchanneled sources carried to our waterways by rainfall or snowmelt moving over the ground. they are confined discharges, and it may be difficult to measure the constituents. confined discharges, generally within a pipe or other conduit used to move fluids or solid waste from point of origin to point of disposal, such as industrial sewage or municipal outfall pipes, and ar these are not usually regulated.

Explanation:

Point - source pollution comes from identifiable, confined sources like pipes. Industrial sewage or municipal outfall pipes are examples. It is not from unconstrained sources (first option incorrect), and while measuring constituents can have challenges, the key is the confined nature. Also, point - source discharges are usually regulated.

Answer:

Confined discharges, generally within a pipe or other conduit used to move fluids or solid waste from point of origin to point of disposal, such as industrial sewage or municipal outfall pipes, and are