Glen Ullin  (CSi) — One little mouse caused an uproar in the town of Glen Ullin Monday after it was found dead and floating in one of the town’s main water supply tanks.

The Bismarck Tribune reports the mouse’s appearance has led to a boil order for the community of 870 that’s likely to be in effect until at least Wednesday. Meanwhile, people can use water to flush toilets and shower. Tap water for consumption, even teeth brushing, should be heated to a rolling boil for at least one minute. Bottled water is a safe alternative.

The boil order was put into effect at 1 p.m. by the State Health Department after the dead mouse was reported to the department’s drinking water program manager Greg Wavra.

City workers have since discovered how the mouse gained egress and fixed the jilted door under which it had crept,