The city has wastewater treatment plants around the lake, and, according to EPD, discharges from such "point sources" can contribute to the water quality problems.
"As it relates to our treatment plants, which would be the most directly affected, potentially, we're already doing a lot of things positively in support of our permit application," Shuler said.
"Nonpoint source" pollution, including stormwater runoff from paved areas such as streets and parking lots, also are to blame but Shuler said the city is meeting storm water discharge guidelines.
http://accesswdun.com/article/2006/4/112971