Schools across New York State are being told to "get the lead out."
Under a new law signed Tuesday by Governor Andrew Cuomo, New York is now the first state to require all schools to test their drinking water for lead contamination.
Elementary schools have until the end of this month to complete the tests.
Schools for older children have until the end of October.
School districts will then report the results to local and state officials, as well as parents.
Any school building with elevated levels of lead will have to come up with a plan to fix the problem.
Exposure to lead can be seriously harmful to children, resulting in brain damage, behavioral problems, and a lowered I.Q.