Crow Agency ran low on municipal water Monday, sparking a scramble for bottled water as workers tried to the keep the utility service online.
In the end, the tribe only suffered a few hours of low water pressure, said Clinton House, Crow disaster and emergency services coordinator. Water from the public utility remained safe to drink.
The problem began Sunday after water treatment operators ran out of alum, a chemical used to manage water clarity.
According the Environmental Protection Agency, the shortage led to a temporary shutdown of the treatment process while more alum was delivered. When operators tried to restart the treatment plant, they ran into problems with the chlorine analyzer, which caused the system to automatically shut down.
An EPA contractor traveled to Crow Agency to provide technical assistance, and the plant resumed operation Monday morning.