Algae blooms in Lake Erie creating toxic release poisoning area water supplies, namely Toledo Ohio. IJC reports:

“It is unacceptable that nutrient pollution has been allowed to contaminate Lake Erie so significantly that the drinking water for more than 500,000 northwestern Ohio residents has been compromised. In the wake of this crisis, federal and state agencies will have an opportunity to act to stem the flow of nutrients into Lake Erie. We urge agencies to learn from this crisis and act swiftly. A great place to start is enacting the recommendations put forth by the International Joint Commission in their report released this spring, “A Balanced Diet for Lake Erie: Reducing Phosphorus Loadings and Harmful Algal Blooms.” Delaying action will only cause continued harm to the lake and more crises like the one Toledo is facing today.”

https://www.greatlakes.org/ToledoWaterCrisis