Water & Wastewater Treatment



The Louisville Water Treatment Division handles all water treatment for the City through its two treatment plants. Water is provided for residents from South Boulder Creek and the Northern Colorado Water Conservation District.

The Annual Louisville Water Quality Report and the Water Quality Parameters are available for you to review. Additional information about water quality testing is also available from NSF International.

If you would like more information about the water treatment process or would like to arrange a tour of the facilities, please contact Terrell Phillips at 303.335.4783.

The following sites will give you additional information on water treatment, stream flow, and other water related topics.


In August, some City of Louisville water customers noticed a taste and odor with the City's drinking water. These seasonal fluctuations are caused by temperature variations in reservoirs and low flows in the surface water supply (i.e. creeks). Taste and odor is an aesthetic quality and has no health effects. The change in taste and odor does not adversely affect the quality of the water as it continues to comply with all Safe Drinking Water Act standards. Seasonal fluctuations are experienced by most communities at some point throughout the year. City staff will continue to monitor all water sources proactively to minimize such taste and odor events.


The Wastewater Division handles the treatment of all wastewater for Louisville.

If you would like information on the wastewater division or would like to arrange a tour of the facilities, please contact Terrell Phillips at 303.335.4783.

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After Hours Emergency Phone NumberCity Council, City Manager's Office, Public Works(303) 441-4444
Kowar, KurtDirector of Public WorksPublic Works(303) 335-4601
Phillips, TerrellWater and Wastewater SuperintendentPublic Works(303) 335-4783