The City of Des Moines Municipal Code (DMMC 11.20) defines a Pollutant or Illicit Discharge as “any direct or indirect non-storm water discharge to the municipal storm water system, surface waters, ground waters, or Puget Sound.” The City has separated these illicit discharges into three different types prohibited, conditional, and allowable. A full list of these illicit discharges can be found in the Municipal Code Section referenced above.
Some activities that may result in illicit discharges include:
Lawn watering with potable water
Dust control with potable water
Automobile and boat washing
Pavement and building washing
Swimming pool and hot tub maintenance
Auto repair and maintenance
Landscape maintenance (pesticides, herbicides, and fertilizers)
Spills and other water quality issues can be reported to the Surface Water Management Department by calling 206-870-6523 during business hours, Monday-Friday, 8:00a.m. to 5:00p.m., or 206-878-3301 after hours, weekend, or holidays and/or the Washington Department of Ecology at 1-800-645-7911.
In order to protect water quality, the public is encouraged to report spills and improper disposal, including suspected illicit connections or discharges into the City’s municipal stormwater system or any body of water in Des Moines.