Ohio is beginning an aggressive attack on toxic algae that spoiled the summer of 2010’s tourism at the state’s largest inland lake.
Beginning Thursday, most of Grand Lake St. Marys will be sprayed with about 3.3 million gallons of alum in hopes it can neutralize phosphorous in the water, which feeds the blue-green algae.
Ohio Environmental Protection Agency Director Scott Nally told The Lima News the $3.4 million operation is expected to continue through the end of June at the lake, about 25 miles southwest of Lima in Auglaize and Mercer counties.
Officials said high phosphorous levels were created by manure and chemical runoffs.
Toxic algae has been found on the lake again this year. In summer 2010, it prompted warnings against swimming, boating and fishing.