
Nearly one year after Mattoon’s water crisis, the city has seen no signs of algal blooms returning
Algal blooms overwhelmed Mattoon’s water system in July 2025, leading to five days of do not drink orders.

Algal blooms overwhelmed Mattoon’s water system in July 2025, leading to five days of do not drink orders.

“We have common problems, so we need to find common solutions. And there are very, very talented researchers and scholars,” Elvira de Mejia said.

The Illinois Environmental Protection Agency and Department of Public Health are warning residents to be on the lookout for toxic blue-green algae for those planning summer activities in Illinois’ lakes and streams. The algae has already been detected in the Illinois River at the Starved Rock Lock & Dam. According to the press release, summer