The U.S. Consumer Product Safety Commission opened an investigation this month after the New Jersey health department found elevated lead levels in two fields, which then were closed.
But until more information comes out, local school districts are not assuming that their fields contain unsafe levels of lead, several officials said.
"I'm not going to alarm parents. There's just not enough data to raise a red flag," said Paula Smith, an assistant superintendent at the Alief Independent School District. "We're in a holding pattern."
Hopefully this is a false alarm. The effects of lead, even small amounts, can be extremely dramatic (though this is usually found in younger children). Children chronically exposed to lead in their homes can develop mental retardation and other brain-related harm.