Potable Water and waste water treatment

• What is potable water?

  Water that is safe to drink.
• Suggest a source of fresh water.

  Rain water
• Descibe how you could distil seawater to produce drinking water: Boil the seawater and evaporate the water to produce a vapour which is then condensed to produce drinking water
• what other method could you use for making sea water potable?

  Filtration
• Name three different sources of waste water:

  domestic, industrial, agricultural, and sewage
• Why is it important to treat waste water before releasing it into the environment?

  Pollution
• What type of waste water could contain harmful chemicals?

  Industrial wastewater
• What two products can be obtained by the anaerobic digestion of sewage sludge?

  fertiliser and natural gas