In this photo made on Wednesday, Dec. 15, 2010, Cecil Griffith, right, the maintenance supervisor, and Jim Riggio, the plant manager for the Beaver Falls Municipal Authority, watch the bubbler at one of the intake gates on the Beaver River at the Beaver Falls Municipal Authority water treatment plant in Beaver Falls, Pa.. Their water began flunking tests for trihalomethanes regularly last year, around the time that a facility 18 miles upstream became Pennsylvania's dominant gas wastewater treatment plant. (AP Photo/Keith Srakocic)
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