FLINT, Mich. (AP) — President Barack Obama is promising the people of Flint, Michigan, that he will make sure leaders at all levels of government "don't rest" until every drop of water that flows through city pipes is safe.

He says clean water is a basic responsibility of government in the U.S. and says what happened in Flint was a manmade disaster that didn't have to happen.

Obama also says he understands why they are scared and angry and feeling let down.

Flint's water became contaminated with lead after the city began drawing water from the Flint River and officials failed to treat it properly, causing a lead-contamination crisis.

Earlier Wednesday, Obama showed his support for Flint residents by drinking filtered city water to show it is again safe for consumption.