- Environmental Services Division
- Stormwater Utility
- Illicit Discharge Detection & Elimination
Illicit Discharge Detection & Elimination
What is an Illicit Discharge?
Illicit discharges are discharges into the stormwater conveyance system that are not composed entirely of stormwater. Illicit discharges often include sediment, nutrients, bacteria, and toxic pollutants.
Learn more about reporting an illicit discharge by checking out the IDDE Brochure.
Report an Illicit Discharge:
Thank you for taking the time to report anything suspicious draining into a city storm drain or from a pipe entering a stream.
What are Examples of an Illicit Discharge?
Controlling Illicit Discharge
Detecting and eliminating illicit discharges is one of the minimum control measures required by the City’s stormwater permit. To improve our water quality and stay in compliance with state and federal regulations, the City of Superior has developed an illicit discharge detection and elimination program. The program includes an ordinance to prevent and eliminate illicit discharges and connections, outfall field screening activities and procedures for responding to and eliminating illicit discharges.
Why are Illicit Discharge Detection and Elimination Efforts Necessary?
Discharges from the storm sewer system into local waterbodies often include wastes and wastewater from non-stormwater sources. Illicit discharges enter the storm sewer system through either direct connections (e.g. wastewater piping mistakenly or deliberately connected to the storm drain) or indirect connections (e.g. infiltration from cracked sanitary systems, spills collected at drain inlets, or paint, oil, or other liquid wastes dumped directed into a storm drain).
The result is untreated discharges that contribute to high levels of pollutants, including heavy metals, toxins, oil and grease, solvents, nutrients, viruses, and bacteria to receiving waters. Pollutant levels from these illicit discharges have been shown in EPA studies to be high enough to significantly degrade receiving water quality and threaten aquatic, wildlife, and human health.
How Can You Help?
City of Superior Illicit Discharge Ordinance Sec. 114-239
In accordance with our stormwater permit, the City of Superior adopted an Illicit Discharge Detection and Illicit Connection Ordinance. This ordinance prohibits allowing pollutants to enter our local waters, regulates connections to the storm sewer system, and outlines enforcement procedures and penalties.