Why do we have water quality standards?
How do we get to a water quality standard?
Where do the numbers come from for water quality standards?
How is the health of waterbodies managed and protected?
Between the 1972 CWA and the reauthorization of the CWA in 1987, EPA had been monitoring the waters of the United States and found that point sources made up only a portion of the water pollution in the environment. From a management standpoint, all of these other pollution sources were labelled as nonpoint source pollution. However, from a practical standpoint non-point source pollution is the same as pollution carried by rainfall runoff.