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Ideally, all drinking water should be purified in the home. You can do this with water filters and water filter systems. The quickest and easiest are water-filter jugs, readily available from department stores and health food shops. Use the filtered water for cooking as well as for hot and cold drinks. Bear in mind that filters can become breeding grounds for bacteria, so regularly replacing the filter and cleaning the filter-housing is essential. A good quality filter should eliminate, or greatly reduce, the levels of heavy metals such as lead, cadmium and mercury, fluoride and chlorine, and remove any adverse tastes, colours and odours in the water.

If you want to go to the next level of convenience you can buy plumbed-in carbon filters to use at your kitchen sink. These are effective at removing chlorine, heavy metals and many organic compounds. However they may not be so successful at removing nitrates and bacterial contaminants.