66% Water

Water is the most common substance found on earth.
Water is the only substance found on earth naturally in three forms: solid, liquid, and gas.
Water freezes at 32 degrees F, 0 degrees C.
Water expands by 9% when it freezes. Frozen water (ice) is lighter than water, which is why ice floats in water.
Water vaporizes at 212 degrees F, 100 degrees C.

80% of the earth’s surface is water.
97% of the earth’s water is oceans or seas.
2% of the earth’s water is frozen and therefore unusable.
1% of the earth’s water is suitable for drinking water.
In a 100-year period, a water molecule spends 98 years in the ocean, 20 months as ice, about 2 weeks in lakes and rivers, and less than a week in the atmosphere.

Health authorities commonly recommend drinking eight 8-ounce glasses of water a day, which equals 2 quarts (64 ounces) or about 2 liters.
We lose over 2 quarts (64 ounces) or about 2 liters of water every day through the normal vapor exchange of our skin, otherwise known as perspiration.

Each American uses an average of 82 gallons (310 liters) of water a day at home (USGS, Estimated Use of Water in the United States in 2015).
Each European uses an average of 38 gallons (144 liters) of water a day at home.
The average African family uses about 5 gallons (19 liters) of water a day.
According to the EPA, a full bathtub requires about 70 gallons (264 liters) of water, while taking a five-minute shower uses 10 to 25 gallons (38 to 95 liters).

A dairy cow must consume 4 gallons (15 liters) of water to produce 1 gallon (3.8 liters) of milk.
It takes 2.6 gallons (9.8 liters) of water to make a sheet of paper.
It takes 6.3 gallons (23.9 liters) of water to make 17 ounces (0.48 kilograms) of plastic.
It takes 924 gallons (3,497.7 liters) of water to produce 2.2 pounds (1 kilogram) of rice.
It takes 3,962 gallons (14, 997.8 liters) of water to produce 2.2 pounds (1 kilogram) of beef.

90% of all Americans receive their drinking water from a public water supply. 10% are on private wells.
26% of the world’s population does not have access to clean drinking water, and 46% lack access to basic sanitation (U.N. World Water Development Report 2023).
Collectively, South African women and children walk a daily distance to fetch water that is equivalent to 16 trips to the moon and back.
Two-thirds of the world’s population is projected to face water scarcity by 2025, according to the United Nations.

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