Lake Ontario's lake trout have been a key indicator of pollution that affects humans and other species.

Ann Arbor's stretch of the Huron River seems an oasis where people can go kayaking and tubing to cool off in the summer. But not far from the river, the ruins of a coal-gas plant dating back to the late 1800s may still be oozing pollutants into the groundwater.

"MADISON, Wis. -- Federal transportation officials have ordered a Houston-based energy transportation company not to re-open a pipeline after it ruptured and leaked oil into a Wisconsin field."

"The Environmental Protection Agency on Wednesday approved a first-of-its-kind program to cut phosphorus levels in Wisconsin's lakes, rivers and streams."

"A settlement reached between environmentalists, the state's pollution regulators and the state's largest steel mill raises questions about the agency's actions -- and invites scrutiny of its leader."

"LAKEPORT, Mich. -- Diesel fuel from a barge that sank in stormy Lake Huron has reached the Michigan shoreline, the U.S. Coast Guard said Thursday evening."

"Federal investigators seeking the cause of a North Side train derailment are taking a close look at the tracks, after early scrutiny of the crew's actions and the train itself revealed no glaring problems."

"Until now, scientists could only guess at the amount of plastic waste in the Great Lakes. This week, a team of researchers sets sail to conduct the first-ever survey of plastic pollution in the world’s largest fresh water system."

"COLUMBUS, Ohio -- A freight train derailment and explosion in Columbus, Ohio, has authorities evacuating a mile-wide area of the city as they try to contain the blaze and determine what's burning."