Definition

Federal regulations define an illicit discharge as “…any discharge to a Municipal Separate Stormwater Sewer system (MS4) that is not entirely comprised of storm water…” with some exceptions. These exceptions are listed in the Stormwater Pollution Prevention policy, Section 3-7 of the City of Montrose Municipal Code.

When to Report

Contact the stormwater coordinator if you suspect or observe any illicit discharge to the stormwater system such as:

• Animal waste
• Cleaning products
• Garbage
• Hazardous waste
• Herbicides
• Lawn chemicals
• Oil and/or petroleum products
• Paint products
• Sediment
• Wastewater
• Yard waste
• Other toxic substances