Water is our most valuable shared resource and together we can keep it
that way for generations to come.
Why does my water taste or smell like chlorine?


Mountain Water Company adds low levels of chlorine to the water for disinfection purposes. Disinfection is critical to drinking water safety. Chlorine has been the most common water disinfectant used in the United States (US) for nearly 100 years. A dramatic decline in waterborne diseases such as cholera and typhoid fever occurred in the U.S. as the number of water systems that disinfected increased. The World Heath Organization considers drinking water chlorination to be one of the most significant advances in public health protection. About 75% of the larger systems and 95% of the smaller systems in the US now use chlorine as their primary disinfectant.

In 2013, the average free chlorine residual in the MWC system was 0.39 milligrams per liter.

For information on reducing the chlorine concentration and/or the hardness of your drinking water contact the National Sanitation Foundation at www.nsf.org/certified/DWTU or the Water Quality Association at https://www.wqa.org/.

back to common questions

More information can be found at the Environmental Protection Agency’s website at http://www.epa.gov/safewater/faq/faq.html

- The Missoula Aquifer
- Watershed
- Rattlesnake Lakes
- Backflow/Cross-Connection
- The Water Quality Report
- Water Quality Questions
- Bottled Water vs. Tap Water
- The Milltown Dam
- Private Wells vs. Regulated Water