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Water Quality Reports

OARS monitors water quality, aquatic plant biomass, and streamflow to assess the health of our rivers. The information collected provides the foundation for our science-based advocacy.

The Water Quality Report for 2020-2021 is available here.
Contact OARS for full water quality data.

Past reports:
2018-2019 Water Quality Report
2017 Water Quality Report
2016 Water Quality Report
2015 Water Quality Report
2014 Water Quality Report
2012-2013 Water Quality Report
2011 Water Quality Report
2009-2010 Water Quality Report
2007-2008 Water Quality Report
2006 Water Quality Report
2005 Water Quality Report
2005 Biomass Report
2005 Biomass Appendix
2004 Water Quality Report
2003 Water Quality Report
2002 Water Quality Report
2001 Water Quality Report
2000 Water Quality Report
1999 Water Quality Report
1992 Water Quality Report

The Rivers
  • Overview
  • Pictorial Tour of The Rivers
  • Watershed
  • Recreation Guides
  • Assabet Tributaries
  • Wildlife
  • The Water Cycle
  • Water Quality
    • Water Quality Reports
  • Technical Reports
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OARS' work is possible because of the support we receive from our members.

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OARS, Inc.
23 Bradford Street, Concord, MA 01742
Directions
(978) 369-3956
office @ oars3rivers.org (delete spaces)
 
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