ARCHIVE SITE - Last updated Jan. 19, 2017. Please visit for the latest NACWA information.


Combined/Sanitary Sewer Overflows


Although clean water agencies have made significant progress in reducing combined and sanitary sewer overflows (CSOs and SSOs), overflow control remains a significant cost for communities and a priority enforcement area for EPA. NACWA is working to ensure reasonable implementation of the CSO Control Policy and the development of a national policy for SSOs. Watershed based approaches and green infrastructure are important components in CSO and SSO management and NACWA advocates for consideration of these innovative management methods. NACWA is also working on national practices for management of collection systems.

For more information on NACWA’s legal activities and litigation related to Combined/Sanitary Sewer Overflows, please visit the Legal Resources key page.

Please visit this page for resources on the Great Lakes legislation - Section 428 of the FY 2016 Senate Interior-Environment Appropriations Bill.




NACWA Letter

  NACWA Transition Letter to President-Elect Trump  

Clean Water Current

  Consent Decree Workshop Offers Insider's View on Enforcement & Implementation  

Clean Water Current

  Federal Court Hears Oral Arguments in Blending Litigation  

Clean Water Current

  EPA Session on Great Lakes CSO Notification Set for September 14  

Clean Water Current

  President Signs Toxic Substances Control Reform Law, NACWA to Track Implementation  

Clean Water Current

  Members Provide Input on Great Lakes CSO Notification  

Clean Water Current

  EPA Issues Report to Congress on CSOs to Great Lakes  

Clean Water Current

  Great Lakes Utilities Discuss EPA Plans on CSO Public Notification Requirements  

Clean Water Current

  Senate Queries EPA on Great Lakes CSO Reporting Requirement, NACWA to Host Call  

Clean Water Current

  NACWA, EPA Discuss Sewer Overflow Notification  

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