In 2010, EPA requested and received stakeholder input on whether, and how, to modify the NPDES regulations as they apply to municipal sanitary sewer collection systems and SSOs. The Agency also received input on issues associated with diversions at wastewater treatment plants that are recombined with the flows from biological treatment units prior to discharge.

• Federal Register Notice, June 1, 2010 (PDF)(7 pp, 162 K, About PDF) - Input was provided through both written comments and during four public listening sessions held in June and July 2010. In addition, a webcast provided national access for members of the public that could not attend the listening sessions.
   
• Federal Register Notice, June 16, 2011 (PDF)(2 pp, 150 K, About PDF) - Workshop announcement.

• Presentation from SSO Listening Sessions (PDF)(32 pp, 1 MB)