Yeah. It went away from the late seventies until the mid 90s. The algae is in the lake naturally. It was too dirty for a while for the algae to grow to full bloom. Then, international ships dumping ballast water in Lake Erie brought us zebra mussels, which essentially cleaned the lake. So clean, sun reaches the bottom where the algae grows. Farm runoff, the source of the Maumee River's legendary turbidity, is a huge factor in supplying extra phosphorus, the algae's preferred food. Strong sunlight plus shallow water plus warm temps plus phosphorus equals algae bloom. The toxic chemical is released when the algae dies. This year, we thought that the long winter would keep temps low and therefore the bloom low. It's nothing compared to 2011, but it's pretty bad for end of July. 2011 sucked.
Ultimately, reducing farm runoff and lawn fertilizer runoff would help reduce the concentration of food in the water.
But, it's been back for nearly 20 years, and we spend around $4M per year treating for it.