Harmful Algal Blooms in Wisconsin Lakes Harmful algal blooms (HABs) are becoming increasingly common in Wisconsin lakes and ponds. These blooms can reduce water quality, impact recreation, harm aquatic ecosystems, and pose health risks to people and ...

Wisconsin’s lakes and ponds, whether you’re on Lake Winnebago, a small county lake in Vilas County, or a neighborhood pond near Madison, support rich aquatic ecosystems prized for fishing, boating, wildlife habitat, and scenic beauty. Yet these water...

Spring is a critical season for lakes and ponds across Wisconsin, as rising temperatures and seasonal mixing, commonly called spring turnover, can dramatically affect water quality. Turnover occurs when the surface water warms and mixes with deeper l...

Microcystis is a type of cyanobacteria that often forms thick, paint-like scums on lakes and pond surfaces, especially in nutrient-rich waterbodies. Certain strains release microcystin toxins that can be harmful to people, pets, and wildlife. Profess...

Algae are a natural part of healthy lake and pond ecosystems. Many types contribute positively—producing oxygen and forming the base of the aquatic food web. But when nutrient levels become unbalanced, algae can grow rapidly, turning clear water into...