Every drop counts: discover your water footprint!
Calculate your water footprint and discover the litres hidden in your daily consumption.
What is the water footprint?
The water footprint is the total amount of freshwater used to produce, distribute and end-of-life treat the products, goods and services we consume every day.
This very high water consumption is invisible to the naked eye, but its impact is very real.
Water footprint and carbon footprint are complementary, and understanding them enables us to act in favour of more sustainable management of the planet's natural resources.
What is calculated in the water footprint?
La culture des fruits, légumes et céréales que nous mangeons
La culture du coton de nos vêtements
La production d'aliments pour les animaux d'élevage
L'extraction des matériaux pour le numérique
La production d'électricité
The water footprint, calculated in thousands of litres per day, takes into account the water needed to produce, distribute and process the goods and services consumed. This calculation also takes into account water stress and weights water consumption according to the scarcity of the resource in the areas concerned.
Please note: the water footprint does not take into account domestic water consumption (showers, toilets, cooking, watering)!
Did you know?
It takes 195,000 litres of water to produce one computer.
Considerable, isn't it?
Did you know?
The water footprint of a pair of jeans is 30,000 litres of water.
Impressive, isn't it?
Did you know?
It takes 75 litres of water to produce one egg.
Considerable, isn't it?
Les gestes du quotidien pour préserver nos ressources en eau
L'eau est au cœur de nos vies et de notre consommation quotidienne, bien au-delà de ce que nous observons à la maison. Chaque jour, des milliers de litres d'eau sont utilisés pour produire les aliments que nous mangeons, les vêtements que nous portons et l'énergie que nous consommons.
Voici quelques exemples de gestes qui auront un impact important sur votre consommation eau indirecte :
- Cooking with local, seasonal produce
- Reducing meat consumption
- Prefer tap water
Understanding for action
Mieux comprendre notre impact sur les ressources en eau est essentiel pour pouvoir agir efficacement. À travers une série d'articles, nous vous proposons des conseils pratiques, des idées inspirantes et des informations clés pour réduire votre empreinte eau.
Économiser l'eau, un enjeu de développement durable
Avec les pressions croissantes exercées par les activités humaines et le changement climatique, la gestion durable de l'eau est devenue un défi planétaire. Que ce soit pour l'agriculture, l'industrie ou l'usage domestique, cette ressource limitée fait face à des menaces importantes. Réduire notre consommation d'eau et adopter des pratiques responsables est donc nécessaire pour préserver les ressources et répondre aux défis environnementaux mondiaux.
Ressources en eau douce limitées
Bien que l'eau soit abondante sur Terre, seule 1 % de l'eau est douce et accessible pour la consommation humaine.
Pollution des eaux
Les pratiques agricoles intensives et les rejets industriels contaminent les ressources en eau, menacent les écosystèmes et notre santé.
Accès à l'eau
Les activités humaines perturbent le cycle de l'eau et compromettent l'accès à l'eau potable, entraînant conflits, perte de biodiversité et déplacements de populations.
FAQ
Your questions about the water footprint
How do you calculate your water footprint?
On the Nos Gestes Climat website, the water footprint is calculated at the same time as the carbon footprint.
Using the Nos Gestes Climat calculator, we calculate the amount of water consumed by each of your uses (purchase of a product or food, use of a service, energy consumption).
So by calculating your carbon footprint, you also get an estimate of your water footprint for a complete picture of your impact.
There are several methods for calculating a water footprint. Each has its advantages, but none at this stage captures the full complexity of the issue of human impacts on the water cycle. We have chosen the AWARE method, which gives a fair assessment of the water stress in the regions affected by water consumption. It is the method recommended by the European Convention, and is widely used by ADEME for its LCA calculations.
Why is domestic water not included in the water footprint?
Domestic water, the water that comes out of your taps for showering, cooking, cleaning... is not included in the water footprint because most of it is returned to the same catchment area after treatment.
Once it has been used, the water is cleaned and returned to local watercourses.
Just because it's not included doesn't mean it's not important! Many areas of France are regularly subject to water restrictions due to periods of drought. It's important to reduce domestic water consumption to share this vital resource more effectively and limit the pressure on local reserves.
Further information: A glossary of terms to help you understand the water footprint
What is green water, blue water and grey water?
There are several distinctions that highlight the qualitative differences in human impact on the water cycle. The colour of the water is a major one:
- Blue water: surface and groundwater withdrawn for irrigation, industrial production or energy;
- Green water: rainwater absorbed by the soil and used to grow crops without artificial irrigation;
- Grey water: quantity of water needed to dilute the pollutants generated by the production of a good or service.
The AWARE methodology we use to calculate the water footprint focuses on water withdrawals, i.e. blue water. It does not take grey water into account.
Further information: A glossary of terms to help you understand the water footprint
What are some examples of the water footprint of certain products?
Here are some examples of water footprints for common products:
- A pair of jeans uses around 30,000 litres of water, mainly for growing cotton;
- A beef hamburger: approximately 380 litres of water ;
- A cup of coffee: 64 litres of water, from cultivation to processing ;
- One kilo of rice: 14,000 litres of water;
- One kilo of potatoes: 330 litres of water;
- A bar of chocolate (150g): 235 litres of water ;
- One litre of milk: about 330 litres of water;
- One egg: 75 litres of water ;
- A loaf of bread: 40 litres of water.
Water is hidden behind everything we consume, in proportions we don't always realise!
What is the average water footprint of a French person?
The water footprint of a French person is several thousand litres a day: between 4 and 8,000 on average.
Unlike the carbon footprint, we do not yet have consolidated data for France, or targets to aim for. But we already have a fairly accurate picture of the consequences of our monopolisation of this precious resource for all living things. We can act collectively to reduce our water footprint.
Does the water footprint lead to the same conclusions as the carbon footprint?
Water footprint and carbon footprint go hand in hand.
A rise of 1 degree in global temperature leads to a 7% increase in atmospheric humidity. Water evaporates more, faster, and violent climatic phenomena intensify. Some regions dry up, while others are flooded.
In addition, the human footprint on soils (artificialization, intensive farming, deforestation) has greatly reduced their capacity to absorb and retain rainwater. It evaporates too quickly, and no longer feeds rivers, lakes and groundwater to the same extent, which is gradually running out.
Every gesture counts in guaranteeing sustainable access to water for all.
To reduce our water footprint, we need to change our daily habits.
Adopting a less water-intensive diet, by eating less meat and favouring local and seasonal produce, also has a significant impact. Finally, by avoiding waste and buying sustainably produced products, we can help preserve water resources while limiting our environmental footprint.