Freshwater can be defined as water with less than 0.5 parts per thousand of dissolved salts. (Seawater or Brine has more than 50 parts per thousand)
The ultimate source of fresh water is rain and snow.
Freshwater systems are the rivers, streams, lakes, ponds, groundwater, cave water, springs, floodplains, and wetlands (bogs, marshes, and swamps)
Freshwater provides water for drinking, sanitation, agriculture, transport, electricity generation and recreation. It also creates habitats for a diverse range of animals and plants.
We cannot live without freshwater.