Chlorine Tablet Use for Household Water Treatment in Emergencies: Guidance for Tablet Selection

The goal of this document is to provide guidance on the assessment and interpretation of  parameters that influence chlorine tablet choice and the selection of specific size(s) of chlorine tablets which should (non-bindingly) be recommended for distribution in a particular emergency context. To coordinate the choice of the appropriate chlorine tablet dose or to inform the best use of available doses for a particular emergency, it is necessary to assess four factors to choose a tablet that will result in an effective and acceptable chlorine residual:
• Water quality
• Recipient context
• Taste and odor thresholds
• Local context
The balance between these four factors may be different for each context in which chlorine tablets are distributed.