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Boston Harbor and Massachusetts Bay
Massachusetts Water Resources Authority


Water Quality Report Archive

Note: Most of these reports are in PDF format
Ambient quarterly monitoring reports
Beach Data
Contingency Plan quarterly reports
Contingency Plan exceedances
Contingency Plan modifications
CSO activations
Deer Island Treatment Plant maintenance
Deer Island Treatment Plant performance
Demand management (Flow Limitation)
Discharge Monitoring
Infiltration and Inflow
Local Limits
Massachusetts Bay bacteria
Operational notifications and upsets
Outfall Monitoring Overview (annual reports)
Outfall Monitoring Science Advisory Panel briefings
State of Boston Harbor reports (1990-2002)
Water quality data (Boston Harbor and tributary rivers)
 
AMBIENT QUARTERLY MONITORING REPORTS
2016
2017
     
     
     
     
Q4 Oct-Dec Q4 Oct-Dec      
2015
2014
2013
2012
2011
Q4 Oct-Dec
2010
2009
2008
2007
2006
Q4 Oct-Dec
2005
2004
2003
2002
2001
Q4 Oct-Dec

 

BOSTON HARBOR BEACH DATA
Carson City Point Constitution M Street Malibu Pleasure Bay Tenean Wollaston
2017 2017 2017 2017 2017 2017 2017 2017
2016 2016 2016 2016 2016 2016 2016 2016
2015 2015 2015 2015 2015 2015 2015 2015
2014 2014 2014 2014   2014 2014 2014
2013 2013 2013 2013   2013 2013 2013
2012 2012 2012 2012   2012 2012 2012
2011 2011 2011 2011   2011 2011 2011
2010 2010 2010 2010   2010 2010 2010
2009 2009 2009 2009   2009 2009 2009
2008 2008 2008 2008   2008 2008 2008
2007 2007 2007 2007   2007 2007 2007
2006 2006 2006 2006   2006 2006 2006
2005 2005 2005 2005   2005 2005 2005
2004 2004 2004 2004   2004 2004 2004
2003 2003 2003 2003   2003 2003 2003
2002 2002 2002 2002   2002 2002 2002
2001 2001 2001 2001   2001 2001 2001

 

CONTINGENCY PLAN EXCEEDANCES
Year Exceedances (Links to PDF Documents)
2017 Red tide
2016 Phaeocystis pouchetti
2015 Phaeocystis pouchetti
2014 Biodiversity Phaeocystis pouchetti
2013 Biodiversity
2012 Biodiversity Phaeocystis pouchetti Red tide
2011 Biodiversity Red tide
2010 Biodiversity
2009 Red tide
2008 Red tide
2007 Phaeocystis pouchetti
2006 Phaeocystis pouchetti Chlorophyll Effluent toxicity Red tide
2005 Phaeocystis pouchetti Effluent toxicity Red tide Red tide
2004 Effluent bacteria Phaeocystis pouchetti
2003 Phaeocystis pouchetti Mussel bioaccumulation
2002 Mussel bioaccumulation Effluent solids Effluent solids Effluent solids Phaeocystis pouchetti PAH and chlordane
2001 Effluent toxicity Effluent bacteria
2000 Effluent chlorine Effluent pH Ambient chlorophyll Ambient dissolved oxygen



CONTINGENCY PLAN MODIFICATIONS
Date Modification Letters (Links to PDF Documents)
11/13/17 Final Modifications to Phaeocystis and infaunal diversity thresholds
1/3/17 Proposed Modifications to Phaeocystis and infaunal diversity thresholds
11/15/01 Proposed Modifications to dissolved oxygen and Alexandrium thresholds

 

CONTINGENCY PLAN QUARTERLY REPORTS
   
2017
2016
        Ambient Effluent Ambient Effluent
        Quarter 1 Quarter 1 Quarter 1 Quarter 1
        Quarter 2 Quarter 2 Quarter 2 Quarter 2
        Quarter 3 Quarter 3 Quarter 3 Quarter 3
        Quarter 4 Quarter 4 Quarter 4 Quarter 4
2015
2014
2013
2012
Ambient Effluent Ambient Effluent Ambient Effluent Ambient Effluent
Quarter 1 Quarter 1 Quarter 1 Quarter 1 Quarter 1 Quarter 1 Quarter 1 Quarter 1
Quarter 2 Quarter 2 Quarter 2 Quarter 2 Quarter 2 Quarter 2 Quarter 2 Quarter 2
Quarter 3 Quarter 3 Quarter 3 Quarter 3 Quarter 3 Quarter 3 Quarter 3 Quarter 3
Quarter 4 Quarter 4 Quarter 4 Quarter 4 Quarter 4 Quarter 4 Quarter 4 Quarter 4
2011
2010
2009
2008
Ambient Effluent Ambient Effluent Ambient Effluent Ambient Effluent
Quarter 1 Quarter 1 Quarter 1 Quarter 1 Quarter 1 Quarter 1 Quarter 1 Quarter 1
Quarter 2 Quarter 2 Quarter 2 Quarter 2 Quarter 2 Quarter 2 Quarter 2 Quarter 2
Quarter 3 Quarter 3 Quarter 3 Quarter 3 Quarter 3 Quarter 3 Quarter 3 Quarter 3
Quarter 4 Quarter 4 Quarter 4 Quarter 4 Quarter 4 Quarter 4 Quarter 4 Quarter 4
2007
2006
2005
2004
Ambient Effluent Ambient Effluent Ambient Effluent Ambient Effluent
Quarter 1 Quarter 1 Quarter 1 Quarter 1 Quarter 1 Quarter 1 Quarter 1 Quarter 1
Quarter 2 Quarter 2 Quarter 2 Quarter 2 Quarter 2 Quarter 2 Quarter 2 Quarter 2
Quarter 3 Quarter 3 Quarter 3 Quarter 3 Quarter 3 Quarter 3 Quarter 3 Quarter 3
Quarter 4 Quarter 4 Quarter 4 Quarter 4 Quarter 4 Quarter 4 Quarter 4 Quarter 4
2003
2002
2001
Ambient Effluent Ambient Effluent Ambient Effluent    
Quarter 1 Quarter 1 Quarter 1 Quarter 1 Quarter 1 Quarter 1    
Quarter 2 Quarter 2 Quarter 2 Quarter 2 Quarter 2 Quarter 2    
Quarter 3 Quarter 3 Quarter 3 Quarter 3 Quarter 3 Quarter 3    
Quarter 4 Quarter 4 Quarter 4 Quarter 4 Quarter 4 Quarter 4    

 

DEER ISLAND TREATMENT PLANT
DISCHARGE MONITORING REPORTS
2017 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2016 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2015 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2014 Jan Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2013 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2012 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2011 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2010 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2009 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2008 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2007 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2006 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2005 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2004 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2003 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2002 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2001 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2000                 Sep Oct Nov Dec
DISCHARGE MONITORING REPORTS - CSO FACILITIES
2017 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2016 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2015 Jan Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2014 Jan Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2013 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2012 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2011 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2010 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2009 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2008 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2007 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2006 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2005 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2004 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2003 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2002 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2001 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

 

 

DEER ISLAND TREATMENT PLANT MAINTENANCE REPORTS
2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

 

DEER ISLAND TREATMENT PLANT PERFORMANCE REPORTS
2017 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2016 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2015 Jan Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2014 Jan Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2013 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2012 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2011 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2010 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2009 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2008 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2007 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2006 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2005 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2004 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2003 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2002 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2001 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2000               Aug Sep Oct Nov Dec

 

DEMAND MANAGEMENT REPORTS
2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

 

INFILTRATION & INFLOW REPORTS
2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
                  2000

 

LOCAL LIMITS REPORTS

Analysis of Industrial Pretreatment Local Limits and Proposed Revisions

NPDES Compliance Summary Report

 

MASSACHUSETTS BAY BACTERIA MONITORING

MWRA monitors bacteria at locations surrounding the MWRA outfall and elsewhere in Massachusetts Bay (see station map below). Water samples are analyzed for sewage indicator bacteria: fecal coliform and Enterococcus. Fecal coliform is used by the Massachusetts Division of Marine Fisheries (MADMF) to monitor water quality in shellfish areas.

An "S" following the station ID means the sample was collected at the surface; a "P" means the sample was collected below the pycnocline (collected only if a pycnocline is present).

The MADMF fecal coliform standard for unrestricted shellfishing is <14 counts/100 ml.

While not used currently by MADMF, Enterococcus is now recognized by the U.S. Environmental Protection Agency as a better indicator of public health risk to swimmers than fecal coliform in seawater. The Massachusetts Department of Public Health adopted the Enterococcus standard for swimming areas: a geometric mean of 35 counts/100 ml and a single sample maximum count (shown) of 104/100 ml.

Excel Spreadsheets
2017 Data
2016 data
2015 data
2014 data
2013 data
2012 data
2011 data
2010 data
2009 data
2007 data
2006 data
2005 data
2004 data

 

OUTFALL MONITORING OVERVIEW REPORTS
      2016 2015 2014 2013 2012 2011 2010
2009 2008 2007 2006 2005 2004 2007 2003 2002 2001
1994 1995 1996 1997 1998 1999 2000

 

 

Most of these reports are in PDF format, which requires Adobe Acrobat Reader®, a free program available from Adobe Systems. To request a paper copy of any report, please contact the MWRA Environmental Quality Department at 617-788-4601, or e-mail us at web.enquad@mwra.state.ma.us.

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