Stormwater Quality Division

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What is stormwater?

Stormwater is water from rain or snowmelt events that does not infiltrate into the ground and flows across the land. Stormwater drains into a combination of underground pipes, inlets, drainage ditches, and ponds designed to collect, convey, and discharge directly into our local creeks and rivers (for example: South Platte River, Big Dry Creek, Clear Creek). Unlike indoor sanitary sewage drains, stormwater does not enter a wastewater treatment plant to be treated.

Stormwater may wash and carry pollutants such as trash, sediment, oils, antifreeze, heavy metals, bacteria, and fertilizers from sidewalks, streets, and parking lots, discharging them directly into our creeks and rivers. Stormwater pollution may pose an adverse toxic effect on aquatic life, plants, animals, and people. That is why Adams County Illicit Discharge Ordinance No. 11 makes it unlawful for any person to intentionally or accidentally allow any liquid or solid waste to enter the storm drainage system.

Please report any unauthorized substance entering the storm sewer system to: 720.523.6400 or e-mail (call 911 for emergencies).

Adams County Stormwater MS4 Permit

  1. MS4 Permit Requirements
  2. 2020 MS4 Annual Report Summary
  3. The Program Description Document (PDD) has been created for the current MS4 PhII permit term 2016-2021. The PPD is available to the public for review and comment. If you would like to receive a copy, please call 720.523.6400 or email

Stormwater Utility Fee

For information about the Stormwater Utility Fee please click here.

For more information please contact the Stormwater Management office at 720.523.6400 or email

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