A New Jersey environmental group that's often at odds with the Christie administration says the governor's policies on the Highlands region haven't made the grade.

The state chapter of the Sierra Club gives the governor a failing grade on progress being made to protect the Highlands against threats.

The 415,000-acre region in Sussex, Morris, Warren, Bergen, Hunterdon, Passaic and Somerset counties contains a significant portion of the state's drinking water.

The report card was issued on the eighth anniversary of the Highlands Water Protection and Planning Act.

The Sierra Club issued an F grade to the administration in each of the prior two years.

The organization's state director, Jeff Tittel, has been a vocal critic of the Christie administration's environmental policies.

(Copyright 2012 by The Associated Press. All Rights Reserved.)