Ask an expert on ground water
Pavla Chyská- EEA expert on Water, Ground water "Ground water is a very important element of the earth's hydrological cycle. It comes from rain and snow melt that seeps into the grounds. Its hidden below the earth's surface and, compared with rivers and lakes, it receives less attention from people but its influence on our lives is enormous. Ground water is very important because it's a vital part of the eco-systems on our planet and, yes, life exists in ground water too. Many water eco-systems like springs, rivers and streams depend on it.
Ground water is also a major source of water for people and especially quality drinking water. In Europe as a whole, about 65% of public water supply is provided by ground water."