Water can be found in lakes, rivers, aquifers and reseviours
You must filter the water to make sure it is safe to drink, they do this with different filter beds. They then chlorinate the water to sterilise it and stop any harmful microbes getting into our bodies
Adding flouride to the water supply;
Flouridated water can improve dental health, some communities make water suppliers add extra flouride to the water.
Filtering water at home:
Water from taps is safe to drink but it not pure because it contains dissolved mineral ions and chlorine. Filtering removes impurities and helps to soften the water.
We can also obtain water from the sea but we have to distill it which is expensive and bad for the environment. Purity of water can be tested by; its boiling point and evaporating it. Boiling points increase as the concentration of salts increase. Pure water will leave no solids after evap
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