The Colorado Stormwater Council (CSC) is an organization for local governments who own a storm drainage system and are required to have a municipal permit (National Pollutant Discharge Elimination System (NPDES) for the discharge from those systems to state waters. In the State of Colorado, the Colorado Department of Public Health and the Environment (CDPHE) is responsible for regulating the discharge of stormwater by issuing discharge permits through the Colorado Discharge Permit System.

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Drain Mural

How can you help?

Stormwater runoff is one of the main sources of water pollution in the nation. By taking action together, we can improve water quality, beautify local waterways and create healthy ecosystems for wildlife to thrive.


Upcoming Events

MS4 Inspector Training Class

This training is being generously hosted by the Keep It Clean Partnership and is designed specifically for City, County and Non-Standard MS4 personnel focusing compliance with MS4 construction site programs.

World Wetlands Day

World Wetlands Day occurs annually on February 2, marking the date of the adoption of the Convention on Wetlands on February 2, 1971.

World Water Day

World Water Day is an annual UN observance day (always on 22 March) that highlights the importance of freshwater. The day is used to advocate for the sustainable management of freshwater resources. World Water Day is celebrated around the world with a variety of events.

Earth Day

Earth Day is an annual event celebrated around the world on April 22 to demonstrate support for environmental protection. First celebrated in 1970, it now includes events coordinated globally by the Earth Day Network in more than 193 countries.