Residents may notice slight changes in water due to source change

City of Boulder water customers in Gunbarrel, Heatherwood, Hoover Hills, and areas north of Arapahoe Avenue and east of Foothills Parkway may notice a slight change in water taste on Thursday, Oct. 27, when the Utilities Division switches water sources at the Boulder Reservoir Water Treatment Plant from the Boulder Feeder Canal to the Boulder Reservoir. Service changes are a normal part of water treatment and distribution operations. No service interruptions are expected while the water source change occurs.

The potential changes are due to differences in source water chemistry between the canal and reservoir water sources. Most of the water in the canal comes from Carter Lake and is typically less mineralized (softer) than the water from Boulder Reservoir.

As part of the standard treatment process, the water is sampled and tested frequently.  These ongoing evaluations are performed by water quality staff to ensure that the highest-quality drinking water is delivered to all Boulder residents.