Flint River (Michigan) in the context of Lapeer, Michigan

The Flint water crisis was a public health crisis from 2014 to 2019 which involved the drinking water for the city of Flint, Michigan, being contaminated with lead and possibly Legionella bacteria.

In April 2014, during a financial crisis, state-appointed emergency manager Darnell Earley changed Flint's water source from the Detroit Water and Sewerage Department (sourced from Lake Huron and the Detroit River) to the Flint River. Residents complained about the taste, smell, and appearance of the water. Officials failed to apply corrosion inhibitors to the water, which resulted in lead from aging pipes leaching into the water supply, exposing around 100,000 residents to elevated lead levels. A pair of scientific studies confirmed that lead contamination was present in the water supply. The city switched back to the Detroit water system on October 16, 2015. It later signed a 30-year contract with the new Great Lakes Water Authority (GLWA) on November 22, 2017.

Flint is a city in and the county seat of Genesee County, Michigan, United States. The city's population was 81,252 at the 2020 census, and was estimated to be 79,735 in 2024. making it the largest city in Genesee County and the 12th-most populous city in Michigan.

Located along the Flint River 66 miles (106 km) northwest of Detroit, it is a principal city within the Mid Michigan region.