State officials on Thursday defended their response to a lead crisis in a small southwestern Michigan city, telling lawmakers that steps to reduce corrosion in aging water pipes began in 2019, just a few months after tests revealed troubling results. Benton Harbor residents will be urged to use free bottled water for drinking and cooking for weeks more, until a federal study confirms that filters can work effectively with the city's tap water, Liesl Clark, the head of Michigan's environmental agency, said.