An important new report makes clear the principal cause of the water crisis in Flint, Mich.: the state government’s blatant disregard for the lives and health of poor and black residents of a distressed city.

The report released Wednesday by a task force appointed last year by Gov. Rick Snyder to study how Flint’s drinking water became poisoned by lead makes for chilling reading. While it avoids using the word “racism,” it clearly identifies the central role that race and poverty play in this story. “Flint residents, who are majority black or African-American and among the most impoverished of any metropolitan area in the United States, did not enjoy the same degree of protection from environmental and health hazards as that provided to other communities,” the report said.

Mr. Snyder, a Republican, and many Republicans in Congress have tried to deflect and minimize the state’s responsibility for the Flint crisis. Mr. Snyder has said the crisis represented a collective failure of local, state and federal governments. And congressional Republicans like Jason Chaffetz of Utah have sought to pin virtually all of the blame on the Environmental Protection Agency, which many of them oppose for ideological reasons.

The task force cut through to the truth and said the agency most at fault was the Michigan Department of Environmental Quality, which reports to Mr. Snyder. The agency failed to instruct officials in Flint, which was under state control at the time, to treat its water with chemicals that would have prevented lead from leaching from pipes and plumbing fixtures into the drinking water. The agency continuously belittled the concerns of local residents and independent experts, and lied to the E.P.A., telling it that Flint was properly treating the water.