The term "water supply" refers to the total amount of water that is available for use by a community, region or country. This includes both surface and groundwater sources, as well as any treated water that comes from public utilities. The water supply can be affected by factors such as droughts, pollution, population growth, and climate change, all of which can impact the availability and quality of this vital resource. Ensuring a reliable and sustainable water supply is an important challenge for governments, businesses, and individuals alike.