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Before even considering water testing, do a sanitary survey - much cheaper and more useful!
See page 158 of
https://www.who.int/water_sanitation_health/dwq/gdwqvol32ed.pdf
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Before even considering water testing, do a sanitary survey - much cheaper and more useful!
See page 158 of
https://www.who.int/water_sanitation_health/dwq/gdwqvol32ed.pdf