Explore water quality in the Neponset Watershed with the Interactive Water Quality Map!
Data in the map was collected by current and past CWMN samplers.
How to use the ‘Interactive Water Quality Map’
- Click image above to view the map
- Scroll to zoom in or out
- To view the water quality data click on a sampling point
CWMN water quality data
2018
September 2018
2017
September 2017 E. coli Results
2016
October 13, 2016 CWMN Data | Stream Status | Map of E. coli
September 15, 2016 CWMN Data | Stream Status | Map of E. coli
August 18, 2016 CWMN Data | Stream Status | Map of E. coli
July 21, 2016 CWMN Data | Stream Status | Map of E. coli
June 16, 2016 CWMN Data | Stream Status | Map of E. coli
May 19, 2016 CWMN Data | Stream Status | Map of E. coli
2015
May 6, 2015 CWMN Data | Stream Status | Map of E. coli
June 3. 2015 CWMN Data | Stream Status | Map of E. coli
July 1, 2015 CWMN Data | Stream Status | Map of E. coli
August 5, 2015 CWMN Data | Stream Status | Map of E. coli
September 2, 2015 CWMN Data | Stream Status | Map of E. coli
October 7, 2015 CWMN Data | Stream Status | Map of E. coli
2014
May 29, 2014 CWMN Data | Stream Status | Map of E. coli
June 26, 2014 CWMN Data | Stream Status
July 24, 2014 CWMN Data | Stream Status | Map of E. coli
August 28, 2014 CWMN Data | Stream Status | Map of E. coli
September 25, 2014 CWMN Data | Stream Status | Map of E. coli
October 30, 2014 CWMN Data | Stream Status | Map of E. coli
2013
April 10, 2013 CWMN Data | Stream Status | Map of E. coli
May 22, 2013 CWMN Data | Stream Status | Map of E. coli
June 26, 2013 CWMN Data | Stream Status | Map of E. coli
August 8, 2013 CWMN Data | Stream Status | Map of E. coli
September 11, 2013 CWMN Data | Stream Status | Map of E. coli
October 23, 2013 CWMN Data | Stream Status | Map of E. coli
2012
April 11, 2012 CWMN Data and Stream status
May 23, 2012 CWMN Data and Stream status
June 27, 2012 CWMN Data and Stream status
August 1, 2012 CWMN Data and Stream status
September 5, 2012 CWMN Data and Stream status
October 24, 2012 CWMN Data and Stream status
2011
April 6, 2011 CWMN Data and Stream Status
May 11, 2011 CWMN Data and Stream Status
June 22, 2011 CWMN Data and Stream Status
August 3, 2011 CWMN Data and Stream Status
September 14, 2011 CWMN Data and Stream Status
October 26, 2011 CWMN Data and Stream Status
2010
April 14, 2010 CWMN Data and Stream Status
May 26, 2010 CWMN Data and Stream Status
June 30, 2010 CWMN Data and Stream Status
August 11, 2010 CWMN Data and Stream Status
September 22, 2010 CWMN Data and Stream Status
2009
April 8, 2009 CWMN Data and Stream Status
May 27, 2009 CWMN Data and Stream Status
July 1, 2009 CWMN Data and Stream Status
August 12, 2009 CWMN Data and Stream Status
September 23, 2009 CWMN Data and Stream Status
October 28, 2009 CWMN Data and Stream Status
2008
October 29, 2008 CWMN Data and Stream Status
September 17, 2008 CWMN Data and Stream Status
August 6, 2008 CWMN Data and Stream Status
June 25, 2008 CWMN Data and Stream Status
May 14, 2008 CWMN Data and Stream Status
April 2, 2008 CWMN Data and Stream Status
2007
October 24, 2007 CWMN Data and Stream Status
September 19, 2007 CWMN Data and Stream Status
August 8, 2007 CWMN Data and Stream Status
June 27, 2007 CWMN Data and Stream Status
May 16, 2007 CWMN Data and Stream Status
April 4, 2007 CWMN Data and Stream Status
2006
November 15, 2006 CWMN Data and Stream Status
September 27, 2006 CWMN Data and Stream Status
July 26, 2006 CWMN Data and Stream Status
May 24, 2006 CWMN Data and Stream Status
March 22, 2006 CWMN Data and Stream Status
January 25, 2006 CWMN Data and Stream Status
2005
November 16, 2005 CWMN Data and Stream Status
September 28, 2005 CWMN Data and Stream Status
July 27, 2005 CWMN Data and Stream Status
May 2, 2005 CWMN Data and Stream Status
March 23, 2005 CWMN Data and Water Quality Status
2004
November 2004 CWMN Data and Water Quality Grade
May 26, 2004 CWMN Data and Water Quality Grade
March 24, 2004 CWMN Data and Water Quality Grade
2003
November 19, 2003 CWMN Data and Water Quality Grade
September 24, 2003 CWMN Data and Water Quality Grade
July 23, 2003 All Data, Water Quality Grade, and Map of Fecal Bacteria
May 28, 2003 CWMN Data, Water Quality Grade, and Map of Fecal Bacteria
March 26, 2003 CWMN Data, Water Quality Grade, and Map of Fecal Bacteria
2002
November 20, 2002 CWMN Data and Water Quality Grade
September 25, 2002 CWMN Data, Water Quality Grade, and Map of Fecal Bacteria
July 24, 2002 CWMN Data and Water Quality Grade
June 23, 2002 Follow-up Water Quality Data
May 22, 2002 CWMN Data and Map of Fecal Bacteria
March 27, 2002 CWMN Data and Map of Fecal Bacteria
The Citizen Water Monitoring Network or “CWMN” is an Environmental Protection Agency approved, volunteer-based approach to water quality monitoring that has been running at NepRWA since 1995 and has provided critical scientific data that enables us to advocate for the cleanup of pollution.
CWMN volunteers sample water quality in streams and the Neponset River, from May through October, throughout the 14 communities of the Neponset Watershed.
If you have any questions about the data, or want to become a CWMN volunteer, please contact Environmental Science Fellow, Andres Ripley, at 781-575-0354 x306 or ripley@neponset.org.
Related publications
2008 “Follow-Up” Sampling Final Report
Boston Harbor Watersheds Water Quality & Hydrologic Investigations, June 30, 2003