Non-Standard MS4 General Permit Renewal

Permit renewal information
The second draft of the Non-Standard MS4 general permit went out for public notice on March 12, 2020. The public comment period closed on June 13, 2020; however, in response to a request the division has granted a responsive comment  period. During the responsive comment period, anyone may respond to a comment that was submitted to the division between March 12 and June 13, 2020. In providing your responsive or rebuttal comments you must specifically refer to the original commenter and the comment. Responsive and rebuttal comments can be emailed to the permit writer listed below. The schedule is as follows:.
Deadline to file responsive comments.
August 10, 2020
Deadline to file rebuttal comments.
August 21, 2020


The draft permit and fact sheet can be downloaded from public notice action webpage.
Comments received on the 03/12/2020 draft
Comments received on the 06/13/2019 draft
Historical documents
  • Presentation - from the stakeholder meeting March 1, 2019.
  • Presentation - from the stakeholder meeting May 7, 2019.
  • Presentation - from the stakeholder meeting July 30, 2019.
  • Presentation - to the Colorado Stormwater Council October 23, 2019.
  • Presentation - to the Colorado School District Environmental Professionals (COSDEP), January 8, 2020.
Mary Welch
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