The City of North Battleford has shutdown its surface water treatment plant due to increased flow and high turbidity in the North Saskatchewan River.
Residents are being asked not to water their lawns and gardens until further notice.
However, the city says the ground water treatment plant, which supplies drinking water, is fine.
The turbid water is expected to reach Prince Albert on Friday morning and the city is considering a temporary shutdown of the water treatment plant.
Prince Albert city manager Robert Cotterill says people should be prepared to conserve water.