The environmental group Tennessee Riverkeeper has mailed written notices to 3M, BFI Waste Systems of Alabama, LLC, Decatur Utilities, and the City of Decatur informing them of their intent to file a federal lawsuit regarding dangerous chemicals in the Tennessee River's Wheeler Reservoir. The environmental group has significant health concerns about perfluorooctanoic acid and perfluorooctane sulfonate contamination in and around the Decatur area.