While overall air quality varies across municipal regions, environmental justice advocates and industrial tracking reports frequently focus heavily on the industrial corridor along the Mississippi River between Baton Rouge and New Orleans, widely known as "Cancer Alley." Communities situated near heavy concentrations of petrochemical plants, oil refineries, and manufacturing facilities—such as St. Gabriel, Reserve, and specific industrial districts within Baton Rouge and Lake Charles—frequently record some of the highest levels of toxic air emissions and localized chemical pollutants in the United States.