Look before you leap. That’s the general advice from state officials when it comes to enjoying New Hampshire’s beaches. The ...

The blooms have become an annual problem in the Great Lakes. DNA studies show what’s growing there and why it’s dangerous.

Blue-green algae blooms are becoming more common in inland waters. The main sources of harmful algal blooms are excess nutrients in the water, typically phosphorus and nitrogen.

Gregory J. Dick, University of Michigan Federal scientists released their annual forecast for Lake Erie’s harmful algal blooms on June 26, 2025, and they expect a mild to moderate season.