ST. LOUIS (AP) — As the Biden administration makes billions of dollars available to remove millions of dangerous lead pipes that can contaminate drinking water and damage brain development in children, some states are turning down funds.

Washington, Oregon, Maine and Alaska declined all or most of their federal funds in the first of five years that the mix of grants and loans is available, The Associated Press found. Some states are less prepared to pay for lead removal projects because, in many cases, the lead must first be found, experts said. And communities are hesitant to take out loans to search for their lead pipes.

States shouldn’t “shrug their shoulders” and pass up funds, said Erik Olson, a health and food expert at the environmental group Natural Resources Defense Council.