The Natural Mineral Water Association has warned restaurants not to break the law by passing off filtered tap water as natural mineral water. The Observer reports in the wake of Coca-Cola's launch of Desani purified tap water that many eateries are making up to 4,500% profit selling filtered tap water. he French House in Soho, London, Snow's on the Green, in Shepherd's Bush, London, the 192 Brasserie, in Notting Hill, London and the Angel Inn, at Hetton, in the Yorkshire Dales have all been found selling filtered tap water. It is illegal not to tell customers they are drinking tap water if they have specified mineral water. The Observer 07/30/04 page 13