Water is an essential substance needed by all living things. Water quality is a measurement of the condition of water and how clean it is for living things, including humans. The distribution of water on earth tells us where we can find water, like in oceans, lakes, rivers, glaciers, and underground. About 97% of Earth’s water is in the oceans!
To better understand Earth’s water supply and distribution….
LET’S BREAK IT DOWN!
Our Water Supply: Most of Earth’s water is in the oceans.
You can divide water into two general categories: freshwater and saltwater. Saltwater is found in the ocean and contains salt. Freshwater is found in glaciers (frozen water), groundwater, and surface water (lakes, streams, ponds, rivers, and swamps).
Water covers 71% of the Earth, but it is not evenly divided between freshwater and saltwater. 97% of the Earth’s water is found in the ocean. That means that only 3% of the Earth’s water is freshwater. Since there is so little freshwater it is very important to know its quality, and how to keep it clean.