NEWARK, N.J. — New Jersey’s largest school district has shut off water fountains at 30 school buildings because of elevated levels of lead.

Newark Public Schools on Wednesday temporarily shut off the fountains where elevated levels of lead were recorded. Alternate supplies of water have been brought in for drinking and food preparation.

The state Environmental Protection Department says parents should have no concerns about their children’s water and food consumption at school. The DEP says drinking water alone is not typically associated with elevated blood lead levels.

The district on Monday notified the DEP that annual testing found levels ranging from non-detect to above the EPA’s action level for lead, which is 15 parts per billion.

The DEP has confirmed lead has not been found in the city’s water supply.