Clean Air Act

The decision upholds a 2017 ruling by a lower court and part of a 2019 order that Ameren install pollution controls at the coal plant.

A federal judge on Monday ordered Ameren Missouri to install devices at its power plants in Festus and Labadie to remove harmful air pollutants. U.S.…

The Environmental Protection Agency is considering making changes to its 2012 mercury standards, which were responsible for major improvements to…

Story updated Feb. 17 with comment from Ameren Missouri — A federal judge has approved the Sierra Club's request to intervene in a Clean Air Act lawsuit…

A U.S. district court judge has ruled that Ameren Missouri violated the Clean Air Act when it made upgrades to its Rush Island Power Plant in Festus in…

Updated Aug. 22 with details from the trial — An Environmental Protection Agency lawsuit alleging that Ameren Missouri violated the Clean Air Act goes to…

Updated Friday, July 22 at 5:07p.m. with statement from Ameren Missouri — Ameren Missouri and the Sierra Club reached a $2 million settlement Thursday in…

The U.S. Environmental Protection Agency plans to designate the area around Ameren's Labadie coal-fired power plant in Franklin and St. Charles Counties…

Six Missouri residents, all actively involved with environment issues for reasons ranging from financial to religious, traveled to Washington this week to…

Last Thursday, just as members of Congress and Americans across the country were getting ready to begin the Memorial Day weekend, the White House quietly…