A mechanical failure caused oilfield wastewater to spill and contaminate an agricultural field in Williams County, ND, Saturday, state officials said.
Initial estimates show the spill involved about 390 barrels, or 16,380 gallons, of produced water, which is a waste byproduct of oil production, said officials at the North Dakota Department of Health.
The mechanical failure occurred at a saltwater disposal facility about 8 miles south of Tioga owned and operated by Hess Bakken Investments II, health officials said.
Bill Suess, spill investigation program manager for the health department, said the spill flowed off the well site and affected an area about 330 feet long and about 75 feet wide.
Health department personnel are inspecting the site and will monitor the investigation and cleanup.