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RedR TSS

There are Hydrogen Sulphide kits H2S which show the presence or absence of faecal coliforms, there is some debate about them. They are available here: https://www.lteksystems.com/bactoh2s/h2sstripkit.htm

Here are several publications that might help. The Oxfam manual on emergency water quality testing is good, the WHO guidelines on drinking water quality are definitive (Found at https://www.who.int/water_sanitation_health/norms/en/index.html)

You probably will have to carry out a strong level of hygiene promotion to make communities understand about water quality and disease and to try to change their behaviour. The PHAST methodology https://www.who.int/water_sanitation_health/hygiene/envsan/phast/en/ (Participatory Hygiene and Sanitation transformation) is good but not, as the name suggests, very fast Regards, Toby Gould