EPA

The federal agency took similar action to address lead contamination in Flint, Michigan. The goal of the coordinator will be to maximize the federal government’s response to long-standing issues in Cahokia Heights.

Missouri health advocates say a recent decision by the U.S. Environmental Protection Agency to review its current ozone air quality standards will delay efforts to improve air quality.

The Republican senator teamed up with Democrats on a proposal that could compensate people sickened by radioactive waste in the St. Louis area.

Cahokia Heights residents are being exposed to bacteria and parasites possibly spreading because of chronic sewage backups and flooding in their community, preliminary findings from an ongoing health study showed.

St. Louis’ water has been tested for toxic chemicals by the Missouri Department of Natural Resources over the past decade and found to be safe. But the new EPA rules would set higher safety standards, and St. Louis will be retested.

In far south St. Louis County, workers are using huge machines to dig a $175 million tunnel. It’s part of a Metropolitan St. Louis Sewer District project aimed at preventing sewers from overflowing. That could allow the district to treat all of the region's wastewater and protect the environment.

Two toxic chemicals found in groundwater wells in St. Charles are linked to Ameren Huster Road Substation.

Midwestern states, including Kansas, Missouri, Iowa and Nebraska, exceed the national average of detectable levels of lead in the blood of children. The Environmental Protection Agency released a new plan to reduce lead exposure.

Ground-level ozone arises when emissions from vehicles, power plants and other sources react to sunlight.

Reporter Allison Kite updates "St. Louis On The Air" about an ongoing investigation into the causes and risks of high lead levels in the Midwest.