Moderate harmful algal bloom predicted for western Lake Erie

Moderate harmful algal bloom predicted for western Lake Erie Visible blooms could impact coastal recreation by mid-July June 25, 2026 An aerial photo of the green waters of harmful algal bloom in western Lake Erie, July 20, 2020. (Image credit: Courtesy of Zachary Haslick, Aerial Associates) NOAA and its research partners are forecasting a moderate harmful algal bloom (HAB) in western Lake Erie this summer. This year’s bloom is expected to measure 3.5 on the HAB severity index, with a potential range of 3 to 4.5.