E-Learning

Concentration and Unit Conversions

Are you confused about figuring out concentration and what units to use in water quality testing? This tool will help you make sense of it all, by explaining units of measure (such as parts per billion and miligrams per liter), and how to convert between them. You'll also have the chance to practice your unit conversion skills.

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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.