Flint says it will stop sending water bills to residents until April so it can account for $30 million in aid from the state of Michigan.

Recent bills have caused frustration and confusion. In a statement Wednesday, Mayor Karen Weaver identified a few factors, including court decisions about rates that are separate from the lead-contaminated water crisis.

Lawmakers are sending $30 million to Flint to pay for 65 percent of the water portion of bills. Residents are using bottled water or filtered water because corrosive tap water from the Flint River allowed lead to leach from old plumbing.

The mayor says the credits could be worth $600 per account.

Separately, Flint is urging a judge to reject a request to halt all water billings. A hearing is planned March 17.