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How to Measure Turbidity Using a Turbidity Tube

This resource provides simple, step-by-step instructions for measuring turbidity using a turbidity tube, a low-cost field tool for estimating how cloudy water is. Measuring turbidity helps determine whether water may require pre-treatment, such as sedimentation or filtration, before treatment methods like chlorination. It is useful for WASH practitioners, field technicians, and community workers monitoring water quality in field settings.

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About CAWST

CAWST is a Canadian charity and licensed engineering firm. We address the global need for safe drinking water and sanitation by building local knowledge and skills on household solutions people can implement themselves.