Keep it Clean, Because We’re All Downstream!
What is Stormwater?
Stormwater is rain, melted snow/ice or other precipitation that flows across the ground and pavement and either seeps into the ground or drains into storm sewers along streets. Pollutants such as motor oil, fertilizers, pet waste and grass clippings are carried in this water through the stormwater collection system and discharged into local waterways.
Impacts of Stormwater Runoff
As the number of homes, roads and business in the city increases, stormwater runoff also increases because there is less exposed soil and vegetation to naturally absorb and contain pollutants. Greater amounts of stormwater runoff can cause erosion of land areas and stream banks, increase flooding and carry pollutants to surface waters.
How You Can Help
Lawn and Garden Care
- Compost or mulch yard waste
When excess grass clippings and leaves wash into storm drains, they contribute excess nutrients and organic matter to streams and can harm the ecosystem.
- Use pesticides and fertilizers sparingly
Use these chemicals only in the recommended amounts and consider natural options (i.e. compost or bone meal). Avoid applying when rain is in the forecast to keep chemicals from washing into storm drains.
- Sweep, don't hose
Instead of hosing debris and waste from your driveway or yard into the street, sweep it up to keep it out of the water system.
- Select hardier plants and grasses
Native plants and grasses are more drought- and pest-resistant and often require less water, fertilizer, and pesticides.
- Don’t overwater your lawn
Water during the cool times of the day, and don’t let excess water run into the storm drain.
Report Stormwater Violations
You can help reduce the negative effects of stormwater runoff by reporting stormwater violations.
- Call the Stormwater Quality Hotline at 303-227-8801
- Submit an Illicit Discharge Form via fax (303-289-8165) or email
What is the City Doing?
The Commerce City Public Works Department works to minimize the negative impacts of stormwater runoff by ensuring that stormwater systems are properly planned, constructed and maintained. Through monitoring drainage design of new construction projects and public education campaigns, the city provides overall stormwater management to help prevent flooding, protect water quality and preserve local waterways.