Where does our drinking water come from?
Our drinking water come from either groundwater such as wells or surface water such as rivers, lakes or reservoirs.
From our map we see that 72% or 3/4th of the Earth is covered with water. But out of this we use only 1% as drinking water because we drink freshwater and not salty water and over 97% of the Earth’s water is in oceans and seas which is salty water and is unfit for drinking. 2% water present in frozen icecaps and glaciers. Therefore, only 1% of the Earth’s water is suitable for drinking.
Groundwater is available from rain and snow that seeps into the ground. Surface Water fills through rivers, lakes or streams.
Water pumped from groundwater or surface water sources into pipes or tanks. The pipes then lead to our homes for drinking water.
Many issues we face:
As Earth’s population is growing more and more, and thus demand fresh water will more and it will be more limited.
Drinking water comes from natural sources and because of human activities it is exposed to pollutants that causes health problems.
Pollutants like bacteria, lead, and nitrates causes bad odors and taste and these are killed with a disinfectant, like chlorine.
Global warming changes the climate that makes dry areas more drier and precipitation became more variable and extreme.