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Region 1: EPA New England

Mystic River Watershed Report Cards

EPA has been assigning a report card grade for the Mystic River Watershed since calendar year 2006.

When assessing water quality to assign a grade to the Mystic River Watershed, EPA uses an average between the overall percentages that water quality met the state criteria for swimming and boating (for 2013, it is 66%) as well as qualitative criteria that are similar to those developed for the Charles River Initiative, as follows:

A - met swimming and boating standards nearly all of the time
B - met swimming and boating standards most of the time
C - met swimming standards some of the time, and boating standards most of the time
D - met swimming and boating standards some of the time
F - fail swimming and boating standards most of the time

For 2013 EPA produced a watershed map (PDF) (1 pg, 943 K. about PDF) that identifies areas in the watershed where water quality is generally good and generally needs improvement.

Year Grade Overall* Dry* Wet*
  Boating Swimming Boating Swimming Boating Swimming
2013 D 83% 49% 88% 51% 67% 42%
2012 D 75% 47% 84% 58% 45% 14%
2011 D 87% 46% 93% 54% 69% 25%
2010 D- 70% 28% 72% 26% 63% 33%
2009 C- 93% 57% 93% 51% 90% 75%
2008 C- 90% 59% 93% 64% 81% 43%
2007 D 68% 46% 63% 45% 83% 50%
2006 D 80% 52% 93% 59% 41% 30%
2005**   85% 56% 90% 64% 69% 31%
2004**   79% 52% 85% 59% 61% 59%
2003**   81% 55% 81% 53% 81% 62%

*Figures represent the percentage of time that state bacterial standards are met.
**The Mystic River Watershed did not receive formal grades for the years 2003 – 2005.

 

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