Officials are monitoring a salt water spill in Billings County that's reached Blacktail Creek.
The North Dakota Department Health says it's estimated 150 barrels of brine water were released from a disposal site. Some of it has reached a creek north of Belfield.
The spill was reported by Encore Energy Partners Operating LLC Wednesday.
The spill is located on U.S. Forest Service land--they're overseeing the clean-up.