What is an illicit discharge?

An illicit discharge is any discharge to a storm sewer system – storm drains, pipes and ditches – that is not comprised entirely of stormwater. Pollutants end up in storm sewer systems in a number of ways, many of which are easily preventable. In some instances, companies or residences have waste pipes tapped into stormwater pipes. In other cases, individuals use the storm drain inlets to dispose of various types of waste. Disposal of anything other than stormwater in storm sewers is illegal. Storm sewer systems cannot treat polluted water. Stormwater does not get carried to the wastewater treatment plant. Storm sewers transport rainwater and everything in it directly to our local streams and rivers. Examples of illicit discharges include:
  • Home Improvement Waste (e.g. concrete, paint)
  • Pesticides and Fertilizers
  • Pool / Spa Discharge
  • Cooking Grease / Household Waste
  • Detergents
  • Improper Waste Oil Disposal / Auto Fluids Flushing