Kalispell Wastewater Treatment

2001 Airport Rd
Kalispell, MT 59901

The City of Kalispell operates an Advanced Wastewater Treatment and Biological Nutrient Removal Facility that has been in service since October 1992, aimed at protecting the pristine Flathead Lake. Following a significant expansion completed in August 2009, the facility's capacity increased from 31 to 54 million gallons per day to accommodate the area's rapid growth.

This state-of-the-art facility utilizes a biological nutrient removal process and a cutting-edge odor control system, achieving exceptional removal of solids, nutrients, and E. coli without chemical use. The plant has received multiple awards for its operational excellence, including recognition from the Montana Water Environment Association and the U.S. Environmental Protection Agency.

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