Tap water in the Danish capital is as clean as mineral water, if not cleaner, and costs a fraction of the price according to a study by Kbenhavns Energi, the Copenhagen electricity supply company. Samples were taken from 14 different brands of mineral water and compared with 12 samples from the local tap water supply. All the water tested complied with drinking water requirements, but high levels of bacteria were found in eight of the bottled water samples against only one of tap water. A litre of tap water costs around DKK0.35 compared to DKK16 for a litre of mineral water.