CLEVELAND (AP) - Ohio environmental regulators say sludge material dredged from the Cuyahoga River and dumped into Lake Erie in the 1970s might be moving toward a Cleveland water treatment plant.

CLEVELAND (AP) � Ohio environmental regulators say sludge material dredged from the Cuyahoga River and dumped into Lake Erie in the 1970s might be moving toward a Cleveland water treatment plant.

The Ohio Environmental Protection Agency said a roughly two-square-mile toxic blob sits about 5 miles from an intake pipe that supplies drinking water to parts of Cuyahoga County.

The sediment is highly contaminated with cancer-causing chemicals, EPA officials said.

Cleveland water officials said Monday they are monitoring the water. Officials don't know how fast the mass is moving or if it will actually reach the pipe. Officials said the city's water is currently safe.

State environmental regulators in late March approved a U.S. Army Corps of Engineers request to dredge Cleveland�s harbor and the Cuyahoga River for shipping traffic.