There are hundreds of different waters in supply in this country- all of them with different chemical analyses. Some waters require long and complicated treatments and others require little more than chlorination before going into supply.
Sorry, flip, but fluoride at 1 mg. per litre does NOT impart a taste to drinking water. A large number of taste complaints are due to problems in the consumers' premises which are often improved by simple means such as running the tap for a short while before using the water.