Measure the tap water flow in your home with a timer and a graduated glass.

Then try to measure your daily use and compare it with that of your classmates.

You will need a graduated container or scale to weight water.

Save water

We all have a responsibility to the environment and we can all help to improve it.

Our habits and way of life influence our environment and can be an example to others. Nothing that one does is irrelevant, however small it may seem. A simple gesture, such as throwing a battery either on the ground or in a deposit for its controlled disposal, is the difference between contaminating tens of thousands of litres of water or avoiding it.

A dipping tap...

A drop of water seems an insignificant amount. In one litre of water there are 4,000 drops. But a dripping tap can waste a lot of water over time.  A tap that loses seven drops per minute, one every eight seconds, loses about 2.5 litres per day of drinking water, the amount of water needs to be drunk by an adult.

There are usually several taps in houses.  And in many houses some taps lose one or two drops per minute.  Sometimes old taps, damaged toilet cisterns, or with valves in poor condition or not well closed lose water with us hardly noticing.  As evidence, do you find any of the taps leaking in your house? And  how fast? Now, think about your neighbours, all the houses in your street, your city . . . How much water is lost drop by drop every year?  Calculate it and compare your results with those of your classmates and friends.

Washing our hands, showering, flushing the toilet, washing fruit or vegetables, mopping the floor, brushing our teeth – we use water many times a day to do any of those things and more.  Especially in the cities, but also in the country, we do all that with drinking water fit for human consumption, but for many of them, such as washing the car or the filling of the toilet cistern, the water need not meet the stringent quality parameters of drinking water. Also, while washing our hands or face or brushing our teeth, we often leave the taps on and waste water that we could save. Reducing the flow of the shower or taps can save between 20 and 50% of household water.  

Do the arithmetic.

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