Stormwater Quality

Keep it clean from drain to stream!

Stormwater runoff is generated when water from rain and snowmelt flows over land or impervious surfaces (like paved streets, parking lots, and building rooftops) and is not absorbed into the ground. As the runoff flows over the land or impervious surfaces, it accumulates debris, chemicals, sediment or other pollutants. If those pollutants get into our waterways, they can cause problems for wildlife, algae blooms and flooding during storms.

Stormwater isn't run through a treatment facility like sewage is, so it's harder to keep the pollutants from getting into our waterways once they're in the stormwater. If we all do a few little things, Denver residents can make a big difference together.

Be a Water Watch Dog!

Help safeguard our lakes and streams. 

Contact the Division of Environmental Quality at (720) 865-5452 if you notice any of the following unusual conditions in our lakes and streams:
  • A change in color of the water 
  • An unusual or foul odor 
  • Suds when there is no precipitation occurring 
  • Any unusual-looking substance discharging from a storm outlet 
  • Illegal dumping activity 
  • Unusual discharges from construction sites or industrial sites 
  • Large number of dead or dying fish or crayfish

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