Our tap water may not be as clean as we think. In this article we separate fact from fiction.
Earlier this month, Cape Town residents were shocked by the news that almost 50% of Western Cape municipalities have high levels of dangerous bacteria and faeces in their water systems. The Cape Times reported that "municipalities were 'grappling' with service delivery, especially in the areas of water and sanitation."
While steps are now being taken to remedy the situation, the quality of our water supply in certain areas seems to be somewhat questionable at the moment. Up until now, however, our tap water was rated as the third best in the world.
Myth: Clear water is safe water
'Just because water looks clear, doesn't mean that there's nothing dissolved in it,' says Dr Frans Kruger, director of Purificare Water Purifiers.
Clear water may contain inorganic minerals, herbicides, pesticides, bacteria, viruses, hormones, chemicals and toxins - in other words, substances that could harm you. Municipal water quality varies from time to time and one can't determine what's been dumped in it just by looking at it.
Myth: Bottled water isn't tap water
While many bottled-water suppliers get their water from natural sources, some bottlers do indeed use tap/municipal water as a source/raw material for their processed water, according to the South African Natural Bottled Water Association (SANBWA).
One example of such a product is Bonaqua, which is produced by the Coca-Cola Company.
Myth: Flavoured water is a whole lot better than soft drinks
Unfortunately, flavoured, sweetened water isn't that much healthier than soft drinks. These drinks still contain a lot of sugar and have a high kilojoule content as a result.
Purely in terms of kilojoules, a 340ml can of Coca-Cola is equivalent to 21/2 slices of bread, while 500ml flavoured, sweetened water is equivalent to 2 slices of bread. This is bad news for your waistline and for your teeth.
Myth: A filter effectively gets rid of harmful substances in water
A filter does indeed filter water, clearing it from some harmful substances. However, dirt, which may become the perfect breeding ground for bacteria, collects at the filter point. 'A filter itself doesn't have an outflow for the contaminants,' Dr Kruger says.
Cleaning your filter every hour or two could be a solution, but might not always be practical. Water purification, which is done through reverse osmosis, might be more useful in ridding water of harmful substances.
Myth: The minerals in mineralised water can make up for a mineral-poor diet
Some people believe that drinking a few glasses of mineral-enriched water every day is equivalent to eating a bowl of vegetables. But this belief simply doesn't make sense. 'If this could be true, I would buy the patent and go to Ethiopia and feed the hungry,' Dr Kruger says.
Kruger makes the important point that water isn't supposed to be anything else than pure water, which forms the basis of a healthy diet. 'Get your needed minerals from the right sources: fresh fruit and vegetables.'
- (Carine van Rooyen, March 2008)
Sources:
Shock finding on Cape waters, Cape Times, 04/03/08 (http://www.iol.co.za/index.php)
Website of the South African Natural Bottled Water Association (http://www.sanbwa.org.za)
PurifiCare Newsletters, compiled by Dr Frans Kruger (http://www.purificaresa.net)