This is a quick guide summarising the visible and invisible water we use in our everyday lives.
Visible water being the water we see, and invisible water being water that we don’t see that is used at a different part of the product lifecycle (such as the farming/growing stage before we eat a piece of fruit for example)
This is a summary and paraphrasing of the page thewaterweeat.com. You can find the full link the the page at the bottom of this page.
Summary – The Invisible & Visible Water We Use Everyday
What we see below is that the food we eat and waste makes up a significant portion of our individual water footprints compared to say the domestic or industrial water footprint of many people
Of the 3800 litres of visible and invisible water a day we use – 137 litres goes to domestic water use, 167 litres to industrial water use, and 3496 litres (or 92%) to food
Eating diets high in animal meat, and especially meats like beef, usually leads to a higher water footprint than vegetarian based diets
Grass fed beef might use less water than corn and grain fed beef (but, some people also question the conversion efficiency in the feed of different farmed animals)
Reducing food waste might be another way to save on a person’s food water footprint
Total Water We Use Everyday
We use about 3800 litres of visible and invisible water a day
Domestic Water Use
We use about 137 litres of domestic water in the home every day.
We use water at home for drinking, cooking, washing.
35% goes towards bathing and showering, 30% to flushing the toilet, 20% to laundry, 10% to cooking and drinking, and 5% to cleaning.
Domestic water use is visible water we can see we are using
Industrial Water Use
We use about 167 litres of industrial water a day.
This water is found in the production of the industrial products we consume everyday, such as paper, cotton, and clothes.
Industrial water use in invisible because it is used on fibre crops, in factories etc. before the produce get to us
Water In Food We Eat
The water used to produce the food we eat adds up to about 3496 litres a day
This is about 92% of the total water we use everyday
Water for food is the water used in the production of the food we consume
Water for food is also invisible
Beef As An Example Of Water In The Food We Eat – “In an industrial beef production system it takes on average three years before the animal is slaughtered to produce about 200 kilos of boneless beef. During the three years the cow consumes nearly 1300 kg of grains such as wheat, oats, barley, corn, dry peas, and other small grains. The cow also consumes 7200 kg of roughages such as pasture, dry hay, silage, and other roughages. The production of all the grains and roughages requires 3060000 litres of water. The cow also drinks 24000 litres of water in the three years. It takes about 7000 litres for servicing the farmhouse and for slaughtering processes. In total, we need 3091000 litres of water for producing 200 kilos of boneless beef. This means that to produce 1 kilogram of boneless beef we need 15 400 litres of water”
Other Examples Of Food Water Footprints (litres per kilo):
Coffee – 18 900 (litres of water to produce one kilo)
Beef – 15 400
Sheep – 10 400
Pork – 6000
Goat – 5500
Chicken – 4300
Cheese – 3180
Rice – 2500
Soyabeans – 2145
Wheat – 1830
Sugar – 1780
Barley – 1425
Maize – 1220
Apples – 822
Agriculture Is Getting More Efficient With Water Use
Science and technology is helping farmers get a higher yield (for crops and livestock) from the same amount of water.
How We As Consumers Can Help Save Water
The average daily water consumption of a meat-eating person is 5000 litres of water per day.
The average for a vegetarian is 2500 litres
Reducing the amount of meat eaten might help save water
The type of meat you eat makes a difference.
Grass fed meat is almost always better (in terms of water use) than corn or grain fed meat
Agri corporations and supermarkets in a lot of cases have grain or corn fed meat
Most developed countries can waste 30% of their food – so don’t waste food if you don’t want to waste invisible water