Scientists have established a water-quality monitoring program in an effort to reduce Type E botulism outbreaks that have killed thousands of birds in recent years at Sleeping Bear Dunes National Lakeshore.

A massive cleanup is transforming one of America’s most polluted rivers, the Grand Calumet, which has long been a major source of toxins entering Lake Michigan.

A ballast water treatment system will keep a Great Lakes ferry from transporting invasive species between Isle Royale and the port at Houghton.

Removing invasive plant species has restored natural functions and created new fish and wildlife habitat at the Cowles Bog wetland complex.

Thirty artificial fish reefs were installed in Lake Huron’s Thunder Bay, creating new fish spawning habitat in an area that was damaged by cement dust.

The U.S. Geological Survey is taking an innovative approach to simultaneously restoring two native fish species — Atlantic salmon and bloater — at different levels of Lake Ontario’s food web.

The dredging of 140,000 cubic yards of contaminated sediment from Milwaukee’s Lincoln Creek and the Milwaukee River channel removed the largest source of toxic PCBs in the river, which will reduce contaminant concentrations in fish.