Concerned over federal cutbacks, groups filed suit, urging state agencies to reopen their nitrate pollution standards and ensure the court enforces progress.

The State of Minnesota faces a new lawsuit over the connection between harmful nitrates from farm fields and the threat they pose to natural resources. Groups behind the legal action have said that, despite recent changes,

The lawsuit alleges the agencies have failed to adopt regulations that are adequate to protect water resources from farm-related nitrate pollution. It also asks the agencies to reopen state rules that govern animal manure and commercial fertilizer,