When the EPA took charge of efforts to cleanup the Charles in 1995, the situation was dire. They issued the river a D grade, declaring it safe to swim in a mere 19% of the time. Much has changed since then. Through the coordinated efforts of government agencies and non-profit organizations like the Charles River Watershed Association, the Charles has undergone an improbable transformation. In 2004, the river received a B+ rating and has stayed in that range ever since. Though its reputation remains—it’s tempting to blame the Standells, who immortalized the river in a not-so-positive light with their 1966 hit “Dirty Water”—the Charles is actually one of the cleanest urban rivers in the United States these days. Last summer the river had its first officially sanctioned public swim in over 50 years.
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