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Stormwater pollution is rapidly growing in importance as a national environmental issue. Stormwater pollution occurs when rain or snow melt flows over streets and picks up trash, oil, dirt, and other pollutants as it travels. These pollutants are then carried to the storm drainage system, which drains directly into our local creeks and streams, untreated.

State and Federal stormwater laws continue to be developed in order to protect this valuable resource now and for generations to come.

View areas of current CSC interest.

Colorado Stormwater Council is dedicated to keeping Colorado water clean by joining local municipalities and organizations together in order to create innovative stormwater programs in compliance with state and federal regulations.

E. coli Symposium - March 11, 2019

The Colorado Department of Public Health and Environment, the Colorado Stormwater Council, Urban Drainage and Flood Control District, and the Big Dry Creek Watershed Association co-sponsored a one-day symposium focused on approaches to address water quality impairments in Colorado due to elevated levels of fecal indicator bacteria (E. coli). An excellent group of knowledgeable speakers, including representatives from the Colorado Water Quality Control Division, EPA Region 8, local governments and consultants presented on their experiences with E. coli. The symposium provided practical information for local governments and others working to identify and reduce E. coli sources as a result of existing and future Total Maximum Daily Loads (TMDLs). The keynote speaker was Dr. Orin Shanks of EPA Office of Research Development who presented the most current information on microbial source tracking and provided some example applications from around the U.S. PDFs of the presentations have been made available below.

  1. 2019 E. coli Symposium Welcome
  2. What’s the Problem with E. coli?
  3. What’s the Latest in Stormwater BMP Performance?
  4. Denver’s E. coli Story: What Have We Done and Learned in 10 Years?
  5. State of the Practice for Bacteria TMDL Implementation and Source Tracking
  6. E. coli TMDLs in Colorado
  7. In the Middle: Navigating an E. coli TMDL and an MS4 Permit for the Present and Future
  8. National Progress and Lessons Learned Since EPA’s 2012 Recreational Water Quality Criteria Update
  9. Pathogen TMDLs: Successes and Lessons Learned
  10. Resources to Facilitate Communication and Collaboration
  11. Water Quality Standards Overview and Flexibilities
  12. Microbial Source Tracking with qPCR: Applications and Technology Transfer