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

The procedure in this document is designed to guide emergency responders in selecting a tablet(s) that provides a dose of chlorine that effectively and appropriately treats water depending on the water quality recipient context, taste and odor acceptability thresholds, and local context in each emergency. Ideally, when all these factors are considered the chosen tablet should dose water at 0.2-1.0 mg/L FCR for the duration of storage, while avoiding doses above the taste and odor rejection threshold starting at the beginning of the storage period. To facilitate consistent use of appropriate doses and reduce confusion, responders need to base selection on a careful assessment of each context.