Schools in New York state are now required to test their drinking water for lead contamination.
The legislation signed into law Tuesday by Governor Andrew Cuomo requires school districts to report test results to local and state officials and parents. Schools found to have high levels of lead will have to develop plans to fix the problem.
Exposure to the toxic chemical can cause significant neurological problems for young children.
Elementary schools must complete the tests by the end of this month. Schools for older children have until the end of October. Schools that can show they have already conducted tests can apply for waivers.
Cuomo says the mandate will make New York the first state in the union to conduct state-wide inspections.