It was known as far back as the Celts era, but it was only included in the list of renowned mineral waters in 1772, thanks to Empress Maria Theresa. According to international balneologic classification Jamnica is hydrocarbonate of sodium cold mentral water. It is drawn from 500 meters deep undrground springs, threfore protected from any kind of pollution. It contains 3800.0 mg/l of different minerals and 3500 mg/l of natural carbon dioxide. It is bottled at the very source and has a healing effect.