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CSO Control Program Annual Progress Reports
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Below is the most recent CSO Control Program Annual Report and an archive of past reports.

Visit the MWRA CSO Main Page for more information about Combined Sewer Overflows and efforts to control them in Boston, Brookline, Cambridge, Chelsea and Somerville.


CSO Annual Prograss Report for 2014 Current Report

CSO Control Program Annual Progress Report for 2014

Released March, 2015
cso annual report for 2012 cover Archive

2013 | 2012 | 2011 |2010 | 2009| 2008| 2007| 2006 | 2005| 2004

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Updated March 16, 2015