Hydrant flushing is starting today (Monday) in two communities.
Dryden Public Works says the exercise is expected to continue to June 20.
Northern Waterworks in Sioux Lookout is predicting one week for its flushing.
If you notice your water is murky or brown, just leave the cold tap running until the water runs clean.
This is sediment off the bottom of the pipes due to flushing.