On the back of an envelope: The water benefits of an efficient toilet

Toilet with flush water tank

The Pacific Institute has done extensive and groundbreaking research over the past 25 years on a wide range of water, climate, energy, and environmental issues. One focus has been on how to use water more efficiently to do the things we want to do – a focus on “efficiency” and “productivity” – not deprivation.

It turns out that our toilets are, typically, the largest single user of water inside our homes and offices. Here is a simple, but significant figure: what kind of savings might result from replacing old toilets with efficient ones?

So, get out the back of your envelope and let’s play some numbers games. Here are some basic data and assumptions for people living in the U.S.:

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