Indicator’s Wording
Indicator’s Purpose
How to Collect and Analyse the Required Data
1) Consult your WASH advisor and/or relevant WASH authorities on how to measure free residual chlorine (FRC) using a pool tester.
2) Ensure that the water samples are collected from all targeted water points or from a representative sample of households.
3) Calculate the indicator's value by dividing the number of targeted water points / household water samples with the correct level of FRC by the total number of assessed water samples. Multiply the result by 100.
Important Comments
1) Measuring FRC is cheaper and faster than measuring faecal contamination but is only applicable when drinking water is disinfected either at the water source or by the household itself (with aquatabs or other similar reagent).
2) At the source level, this indicator will give a sense of the quality of the water committees’ work. At household level, this indicator assesses the correct usage of the reagent.
Access Additional Guidance
- Global WASH Cluster
- WHO (2011) Guidelines for Drinking-Water Quality (.pdf)