After a local environmental advocacy group requested an intervention, the U.S. Environmental Protection Agency has ordered Minnesota to impose stricter limits on pollutants going into the state's lakes and rivers.
According to the Star Tribune, the Minnesota Center for Environmental Advocacy says the state isn't doing enough to enforce the Clean Water Act, particularly regulating wastewater treatment plants' discharge of phosphorus, which can cause noxious and sometimes toxic algal blooms.
The newspaper said the Minnesota Pollution Control Agency has been discussing the matter with the EPA for some time and has already made some changes.
If the state doesn't comply, the EPA would take over the job of writing all pollution discharge permits in Minnesota, the Star Tribune reports.
The order issued May 15 is similar to actions by the federal agency in about a dozen states.