A pipeline leaked produced water into pastureland in McKenzie County last week, the North Dakota Department of Environmental Quality reported Tuesday.
The spill happened 4 miles west of Watford City on Friday along a pipeline operated by Henry Hill Oil Services. An initial estimate says that the line leaked 200 barrels or 8,400 gallons of produced water, which is a mixture of saltwater and oil that can contain drilling chemicals.
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Environmental Quality says state inspectors will monitor cleanup.