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Green Plumbing

Category - Caring for Our Water

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Each of the following is a method for computing water supply/demand, except:

Meter reading from a site
National usage survey
Total water processed or pumped divided by population
Total water supplied, minus industrial uses, divided by population

Explanation

Answer: B - A national usage survey is not a method for computing water supply/demand. Reading a meter at a site is one method. So are dividing either the total water processed/pumped or (total water supplied - industrial uses) by the population. Each of them has different purposes and each gives a different answer in terms of gallons per capita per day.

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