Water

    Cards (14)

    • All humans rely on safe drinking water.
    • Salt can be removed from sea water to make it safe to drink.
    • Waste water must be treated before being released into the environment.
    • Potable water is water that is safe for humans to drink.
    • Potable water is not pure water because it almost always contains dissolved impurities.
    • For water to be potable, it must have sufficiently low levels of dissolved salts.
    • Microbes in water can cause illnesses.
    • The methods used to make water potable depend on where you live.
    • In the UK, rain provides enough fresh water to meet the needs of the population.
    • During the summer months in some areas of the UK, water reserves run low and people are encouraged to conserve tap water by the use of hosepipe bans.
    • Rainwater collects in rivers, lakes and in rocks underground.
    • This water contains low levels of dissolved substances.
    • Most potable water in the UK is produced from naturally occurring fresh water by passing the water through filter beds to remove insoluble particles.
    • The methods used for sterilisation include chlorine, ozone and ultraviolet light.
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