School districts in New Jersey that haven't tested their drinking water for lead must do so within a year under new rules adopted by the state.

The regulations were passed by the state Board of Education on Wednesday and say districts that test within a year will be eligible for reimbursement through the state. Districts can apply for a one-year extension if they've tested their water within the past five years.

The regulations also call for districts to test their water used for drinking and cooking at least once every six years.

The new rules were ordered by Gov. Chris Christie after elevated lead levels were found in the water at several districts, including Newark, last year. Officials say potential exposure to lead-contaminated drinking water poses serious health risks.