Delaware's beaches rank first in water quality out of 30 states, and Dewey Beach is among the best.
The new report from the Natural Resources Defense Council found just 3 percent of water samples exceeded the national "Beach Action Value'' for 24 beach areas in 2013.
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Dewey Beach is listed as a "superstar" beach for its water quality over several years.
Maryland's beaches ranked fourth in beach water quality out of 30 states.
The state's "superstars" were listed as Point Lookout State Park and Assateague State Park.
Beaches in Delaware that had the highest rates of exceeding the clean water limits were: Rehoboth-Virginia Avenue Beach at 11 percent, Deauville Beach at 11 percent, Slaughter Beach at 8 percent and Broadkill Beach at 6 percent.