Researchers in northern Ohio are set to announce their outlook for the algae on Lake Erie this summer.
Officials with Ohio State University's Sea Grant Program will offer their forecast on Thursday.
The algae blooms on Lake Erie during recent years have become a growing concern among politicians and cities that use the lake for drinking water. Those involved with the lake's tourism and fishing industries are pushing for a solution to the problem.
Phosphorus from farm fertilizer runoff and sewage treatment plants feed the algae that leave behind harmful toxins.
Farm groups in Ohio have been asking farmers to take steps to reduce runoff before government regulators impose their own restrictions.
In May, researchers hinted that heavy rainfalls this spring could bring another big algae outbreak later this summer.