Behind the Sip: The Water Usage in a Latte
Many of us enjoy the deliciousness of a latte without pondering the amount of water that goes into its production. However, the water usage in a latte extends beyond just the coffee and milk. In this article, we break down the various factors contributing to the water footprint of a latte, from the brewing process to the ingredients used.
The Water in Espresso
Espresso is the base of a latte, and making a single shot of espresso typically uses about 1 ounce (30 ml) of water. A standard latte contains one or two shots, which translates to approximately 30-60 ml of water. This is the initial step that lays the foundation for the latte's water footprint.
The Water in Steamed Milk
The steamed milk component of a latte is another significant contributor to the water usage. A typical 8-ounce (240 ml) latte will contain around 6-8 ounces (180-240 ml) of milk. Interestingly, the water content in milk is approximately 87%. This means that for 6 ounces of milk, roughly 5.2 ounces (150 ml) of water is typically used. It's important to note that this water is not the water used to produce the milk but rather the inherent water content in the milk itself.
Water for Cleaning and Other Uses
Fine-tuned equipment and cleanliness are key in maintaining the quality of a latte. Additional water is used for cleaning the espresso machine and other equipment, which can add a small but necessary amount to the total water usage.
Total Water Estimate for a Latte
When considering the espresso water and the water content in the milk, plus some additional water for cleaning, the total water usage for a latte can be estimated at around 180-210 ml. This estimate does not account for the water required to grow the coffee beans or produce the milk, which are the sources of the ingredients used in the latte.
Water Usage in Ingredient Production
The 200L number cited in some articles is often a broad and unrealistic extrapolation that assumes no other use for the plants, cows, and other components involved. This number is misleading and illogical. For example, if we were to include the water required for the barista to be born and grow up, it would be an absurd calculation. Similarly, the water needed to produce the biological material present in the soil where the coffee grew is also not considered a part of the direct water use in the latte.
It's worth noting that while the direct water use in the production of a latte is relatively small, the water used to grow the ingredients, such as coffee beans and dairy products, can be significant. Reducing water consumption in the coffee industry as a whole can help mitigate the impact of water usage on our planet's resources.
In conclusion, understanding the water usage in a latte can help us make more informed decisions about our consumption habits and the environmental impact of our daily choices. By focusing on sustainable practices, we can enjoy our lattes while being mindful of our ecological footprint.