The state is setting up a monitoring system at the polluted Grand Lake St. Marys that officials say will help battle the algae that's fouling the water. Four water monitoring stations have been set up at the lake between Dayton and Toledo.
It's the state's largest inland lake and it has been plagued by algae in recent years, prompting warnings against swimming and boating last summer.
In June, the state began spraying the lake with about 3 million gallons of alum in hopes the chemical can neutralize phosphorous in the water that feeds the blue-green algae.
The Lima News reports natural resources officials say the new monitoring stations will help manage efforts to treat the lake. Officials say high phosphorous levels were created by manure and chemical runoffs.