Ken Moraff of the US EPA Reveals the Mystic River Report Card for 2010.During the 15th annual Mystic River Herring Run and Paddle on Sunday, May 15th, the US EPA announced the annual Mystic River Report Card. The Mystic River Watershed received a grade of "D-" for water quality conditions for the calendar year 2010. The grade is based on bacterial contamination, and the monitoring data is collected by MyRWA’s trained water quality monitors as part of the Baseline Monitoring Program. This grade indicates that water quality met swimming standards only 28 percent of the time, while boating standards were met 70 percent of the time.