LANSING, Mich. — Michigan lawmakers directed another $28 million on Thursday to address Flint's lead-contaminated water supply, allocating money for bottled water, medical assessments and other costs for the financially struggling city.

The quick and unanimous approval by the House and Senate came just over a week after the funding was proposed by Gov. Rick Snyder, who is expected to sign it quickly.

"We obviously have a number of issues that we have to deal with, whether it's infrastructure, whether it's folks having to pay for water that obviously is undrinkable," said Senate Minority Leader Jim Ananich, D-Flint. "But the most important I think right now ... is to start the focus on the assessment and the providing of services."

This is the second round of funding enacted since the crisis was confirmed in the fall, bringing the total allocated to nearly $39 million. Snyder has promised to put forward more funding for Flint in his upcoming annual budget proposal, but has not said how much.

It is unlikely to be as high as the up to $400 million figure mentioned in Congress on Thursday. Senate Democrats proposed that amount in emergency federal aid to Flint, with a requirement that the state match the spending on Flint pipes, dollar for dollar.

"This is a state responsibility," Michigan Sen. Gary Peters said at a news conference at the Capitol. "The state broke it. They need to fix it."

Flint's water became contaminated when the city, under emergency state management, switched from the Detroit municipal system and began drawing from the Flint River in April 2014 to save money.

State regulators failed to ensure the new water was treated properly and lead from pipes leached into the water supply. Some children's blood has tested positive for lead, which has been linked to learning disabilities, lower IQ and behavioral problems.

While the damage to Flint's water distribution infrastructure potentially is $713 million, according to an assessment done by Genesee County and cited in the state's request for federal assistance, Snyder and the Republicans who control the state Legislature said it is far too early to talk about a wholesale replacement of the pipes.

Snyder's administration has estimated it could cost up to $55 million to repair some 15,000 lead pipes. Officials are hopeful that the addition of anti-corrosion chemicals will effectively recoat the lines.

The state spending bill includes $500,000 for outside experts to study the integrity of the water system infrastructure.

"Before we start throwing money into infrastructure, we need to know really what the condition is, where the pipes are, how many there are," said House Appropriations Committee Chairman Al Pscholka, R-Stevensville. "There's a lot of unknowns."

The money approved Thursday will pay for developmental assessments of children age 3 and younger, additional school nurses, lead and blood testing, plumbing fixture replacements and other costs.

The largest allotment — $4.6 million — is for bottled water, filters and replacement cartridges being distributed to residents in the city of nearly 100,000 people. About $3.9 million will be used to treat children with high blood-lead levels.

Snyder said Wednesday that about 200 children have been identified but more need to be tested. Ananich pointed to an unknown number of people who were potentially exposed before the disaster came to light and were never tested before the toxin dissipated from their body.

"We have to assume this is population-wide," he said.

Legislators said they were able to shift about $3.4 million to other Flint priorities because of charitable donations and the ability to buy water at discounted rates after a federal emergency declaration was issued. The Legislature also voted Thursday to extend Michigan's emergency declaration until mid-April.

Associated Press writer Matthew Daly in Washington, D.C., contributed to this report.