Although we often don't think about it, we add a number of chemicals into the waste water system simply through use of everyday products.
Ibuprofen is an anti-inflammatory drug. As with the contraceptive pill, our bodies do not use all of the active ingredients and the excess is excreted in our urine. Water companies are looking at working with pharmaceutical companies to develop drugs that our bodies can absorb better.
Triclosan is an anti-bacterial and anti-fungal found in soaps, deodorants, toothpastes, mouth washes and cleaning supplies. Surprisingly it is also increasingly found in other items such as kitchen utensils, toys, bedding, socks and rubbish bags. The American Food & Drug Agency found that soap is just as effective in the home, except in mouth wash, or in hospital to reduce the spread of MRSA.
The cost of removing Triclosan at sewage works in the UK is about £32bn. Denmark's public awareness campaigns have seen a 54% reduction in use. Some UK supermarkets are now eliminating it from their own brand products.
TributylTin (or TBT) is a highly effective fungicide. It is used in sports clothing to reduce odours from sweat but a small amount is enters the sewer system every time an item is washed. It's difficult to know if your kit contains TBT, but there are restrictions on importing products with high levels.
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Wessex Water Magazine Autumn/Winter issue 2013]