The Kansas Department of Health and Environment (KDHE) and the Kansas Department of Wildlife and Parks (KDWP) are announcing the beginning of the Harmful Algal Bloom season. The water recreation season in Kansas officially runs from April 1 to October 31, as do the harmful algae blooms (HAB) response program’s active operations. Kansans should remain extra vigilant while engaging in activities taking place in or on the water, such as swimming, boating, and fishing A harmful algal bloom (HAB) may look like foam, scum or paint floating on the water and be colored blue, bright green, brown or red.