GCSE Combined Science (AQA)

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Potable Water

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Using resources Using the Earth's resources and obtaining potable water

Potable Water

2:36 Resource Use and Potable Water
Spec 4.10.1.2
Previous Properties of Hydrocarbons Next Using Earth's Resources
  • Water of appropriate quality is essential for life.
  • Potable water is safe for human consumption.
  • Tap water and bottled water are examples of potable water.
  • Drinking directly from the ocean is non-potable and unsafe.
  • Potable water is not the same as pure water.
  • Pure water contains only H2O, while potable water can have dissolved substances.
  • Potable water can contain dissolved salts and minerals.
  • Tap water and many types of spring and bottled water have minerals dissolved in them.
  • For water to be potable, it must satisfy certain conditions:
  • It should have a neutral pH (not too acidic or too alkaline).
  • It should have low levels of dissolved salts and microbes.
  • Salty water can dehydrate and damage organs.
  • Microbes in water can cause harmful diseases.

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