The Reality of Water Usage in Showers

Simple huh?

But before you go out and buy a new showerhead, you may already have one that has the approved 2.0 gpm flow rate. You might want to do this little test before you rush out.

Here’s how to determine your showerhead’s flow rate:

  • Place a bucket-marked in gallon increments under your shower head.
  • Turn on the shower at the normal water pressure you use.
  • Time how many seconds it takes to fill the bucket to the 1-gallon mark.

If it takes less than 20 seconds to reach the 1-gallon mark, your shower uses about 3 GPM and you could benefit from a showerhead with a more efficient flow rate.

For more information, you can take a look here.

singing in the shower

By aiming to get your shower done in 4 minutes, you would be using about 32 litres of water. This in turn means that you will save up to 40% of water you would normally use while showering and this is simply by replacing the showerhead. Just one minute less in the shower can save enormous quantities of water.

Oh, The Water You Could Save

By simply replacing showerheads and paying attention to the amount of water you use, you could make a big difference in the world.


  • Old Showerhead – 12-15 litres per minute
  • Efficient Showerhead – 7 litres per minute


  • Single Flush – 12 litres
  • Dual Half Flush – 3 litres
  • Dual Full Flush – 6 litres


  • Half full –80 litres on average
  • Full – 140 litres on average


  • Brushing teeth/shaving with tap running – 5 litres per min
  • Brushing teeth/shaving with tap off – 1 litre per min
  • Hand basin – 5 litres

More on this table can be found here.

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