A Utah Lake algae bloom has covered more than 90 percent of the state’s largest freshwater lake. Environmental officials urge caution.

Scientists at State University of New York monitor Sodus Bay water quality off Lake Ontario to better predict algal blooms.

Releases from Lake Okeechobee have contributed to a large mass of algae along the state’s coastline that has impacted tourism and harmed aquatic life.

What is Annex 4? And what progress has been made to achieve its goals as part of the Great Lakes Water Quality Agreement? We take a look.