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[[Image:safe_water_systems_icon.png|right|80px]]
[[Image:chlorine disinfection.jpg|thumb|right|200px|A women using chlorine to disinfect water]]
Chlorine began to be widely used as a disinfectant in the early 1900’s. It revolutionized drinking water treatment and dramatically reduced the incidence of waterborne diseases. Chlorine remains the most widely used chemical for water disinfection in the United States.
===Suitable conditions===
Unlimited amounts of water can be processed at a time, depending on the amount of active chlorine.
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===Construction, operations and maintenance===
There are several different brands of chlorine products that have been manufactured specifically for household water treatment. Each product should have its own instructions for correct dosing and contact time.
There are many producers of chlorine solutions all around the world. <!--See CAWST’s Sodium Hypochlorite Product Sheets for further details.-->
===Costs===
{{Treatment_Cost
|CapCost=US$ 0
Note: Program, transportation and education costs are not included.
===Field experiences===
===Manuals, videos, and links===
*[http://www.cawst.org CAWST (Centre for Affordable Water and Sanitation Technology)]
*[http://www.enpho.org/drinking_water_quality.htm Drinking water quality information from Environment and Public Health Organization (ENPHO)]
*[[Solution_of_the_week_3|Akvo water solution of the week 3]]
===References===
<references/>
===Acknowledgements===
This article is based on a factsheet from [http://www.cawst.org/ Centre for Affordable Water and Sanitation Technology (CAWST)], which is gratefully acknowledged.
