Chlorine removal from tap water

Updated February 21, 2017

Chlorine in tap water was originally added in the early 20th century to kill waterborne pathogens like cholera and typhoid, much as fluoride was later added to reduce the incidence of tooth decay. Virtually all municipally supplied tap water contains chlorine, so anyone living in or around a major city has chlorinated tap water. The most common reasons to remove chlorine from tap water are to water house plants, to fill freshwater fish tanks or to improve health. Some people believe water free of chlorine is healthier for the human body.

Attach a chlorine-removing water filter to your water faucet. These can be found at many hardware or department stores.

Boil tap water in a pot on a hob burner or other heat source. Boiling water for approximately five minutes will remove the chlorine from the water, and it can be used after the water cools to room temperature.

Add dechlorination tablets to any container that is filled with tap water. Although the result is not drinkable, this is a common method for removing the chlorine when using tap water to fill fish tanks, and these tablets can be found at any pet supply store.


Chlorinated tap water can also be allowed to sit in an open container for several days. Although this will rid the water of chlorine, it is an imprecise and time-consuming method that may not be suitable for your needs.

Things You'll Need

  • Chlorine-removing water filter
  • Pot
  • Hob burner or other heat source
  • Dechlorination tablets
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About the Author

Dale Yalanovsky has been writing professionally since 1978. He has been published in "Woman's Day," "New Home Journal" and on many do-it-yourself websites. He specializes in do-it-yourself projects, household and auto maintenance and property management. Yalanovsky also writes a bimonthly column that provides home improvement advice.