North Dakota health officials said drinking water is safe to use following an oil spill in the Montana waters of the Yellowstone River. The North Dakota Department of Health and the city of Williston in a joint statement said they were still monitoring water levels, though the most recent test data show pollution levels are well below the threat level. “The tests revealed low levels of hydrocarbon contaminants within the system, but the level of contaminants is decreasing over time, which suggests that the contaminants are now leaving the system,” Saturday’s statement read. The Poplar pipeline, operated by Bridger Pipeline, spilled oil into the Yellowstone River in mid January. A unified command responding to the spill said oil recovery continues, with the estimated spill volume reduced […]