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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. This year, in coordination with the Mystic River Watershed Association (MyRWA), EPA is utilizing an enhanced, more locally-specific analysis of water quality in the Mystic River Watershed to illuminate environmental conditions for the public. Instead of one grade for the entire watershed, EPA and MyRWA are issuing grades for each segment of the watershed, totaling 14 separate stretches of river and its tributaries.

Compliance Rates and Grades for 2014

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Image developed by Mystic River Watershed Association (MyRWA)


EPA produced a watershed map (PDF) (1 pg, 1.2 MB. about PDF) or 2014 that identifies areas in the watershed where water quality is generally good and generally needs improvement. Read the press release here.

For more information on how the grades are assigned please read the Frequently Asked Questions.

Grading Criteria in Previous Years

When assessing water quality to assign a grade to the Mystic River Watershed prior to 2014, EPA used an average between the overall percentages that water quality met the state criteria for swimming and boating (for 2013, it was 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

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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