The U.S. Environmental Protection Agency requires Collier County to operate its storm sewer system in a manner that prevents pollution flowing into state waterbodies.

Collier County’s MS4 is covered under an NPDES Phase II MS4 Stormwater Permit (Permit ID FLR04E037). The permit requires the County to have a Stormwater Management Program (SWMP) that prevents pollution from entering the MS4.

Pollution can occur in various forms. It can come from pipes from homes or businesses dumping into swales or canals. Additionally, pollution can come from hazardous materials poured into a storm drain. These are referred to as illicit discharges.

Hazards Associated with Illicit Discharges

Untreated discharges contribute to high levels of pollutants, including heavy metals, toxic substances, oil and grease, solvents, nutrients, viruses, and bacteria to receiving waterbodies. Pollutants from these illicit discharges significantly degrade water quality and threaten aquatic and wildlife health, as well as human health.

Additional Permit Details:

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Updated: 06/14/2023