From the Canyon Courier:
The Evergreen Metropolitan District will begin the annual water-main flushing program the first week of June and continue through the summer. Affected areas will be Tanoa, El Pinal, Wah Keeney Park, Hiwan Hills and Hiwan. The purpose of water-main flushing is to remove fine particles that settle in the water mains that cause color, taste and odor issues. If you have any questions, contact the Evergreen Metropolitan District at 303-674-4112.
More infrastructure coverage here.