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3.48 The use of reclaimed water includes water used for watering planted areas, washing paving and similar purposes within the development where water from the public supply would otherwise be used. Chapters 4 and 5 give further consideration to the use of rainwater and grey water to meet domestic water needs respectively. Drinking water quality and bottled water 3.49 So far there has been little mention of drinking water in this strategy. This is largely down to the excellent quality of drinking water. In the UK our drinking water is of a very high standard, and among the best in the world. Nevertheless, misconceptions associated with the quality of tap water, in terms of taste and perceived ‘unhealthiness’ of tap water, can encourage people to purchase bottled water. In terms of cost, tap water is roughly 1000 times cheaper than bottled water, with 50 glasses of tap water costing one penny. Bottled water, per litre, can be more expensive than petrol. 3.50 The Mayor and Thames Water launched the London on Tap campaign in February 2008 to promote tap water in London’s restaurants, cafes and pub. It aims to: • raise awareness of the high quality of London’s tap water, the contribution of bottled water to climate change, and the benefits of drinking water to health and wellbeing • encourage customers in bars and restaurants to ask for tap water rather than feeling obliged to ask for more expensive bottled brands • encourage restaurants, bars and hotels across London to proudly serve tap water to customers, giving them a real choice about what water they can drink • Last December, the Mayor announced the winner of a competition to design a carafe that will be used to serve tap water in restaurants, cafes, bars and hotels throughout the capital. The Mayor also supports the concept of drinking water fountains and is keen to see them wherever possible in London. Proposal 7 The Mayor will work with the water companies and other partners to raise awareness of the high quality of London’s tap water, the contribution of bottled water to climate change, and the benefits of drinking water to health and wellbeing. He will also encourage restaurants, bars and hotels across London to serve tap water to customers. 3.51 In 2004, over 1.7 billion litres of bottled water were sold in the UK. While this accounts for a very small proportion of total water use, because of the transport and packaging involved, bottled water has a much higher carbon footprint per litre than water supplied via the tap – more than 300 times the carbon dioxide emissions per litre in the case of some imported brands. Further information on the environmental impact of bottled versus tap water is given in report The Environmental Impact of Food Consumption and Production prepared for Defra in 2006 59 . 57
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