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To look at the reasons behind the question, testing by itself will not tell you much. A much cheaper. flexible and appropriate method - promoted by the World Heath Authority is to do a sanitary survey
https://www.who.int/water_sanitation_health/dwq/gdwqvol32ed.pdf
This will allow you to work out the risk of faecal pollution. Also talk to your District Water Officer! It's their job
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No.2 Revision
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To look at the reasons behind the question, testing by itself will not tell you much. A much
cheaper.
cheaper,
flexible and appropriate method - promoted by the World Heath Authority is to do a sanitary survey
https://www.who.int/water_sanitation_health/dwq/gdwqvol32ed.pdf
This will allow you to work out the risk of faecal pollution. Also talk to your District Water Officer! It's their job