Lithuania has one of the largest fresh water supplies, compared with other countries in Europe. Lithuania and Denmark are the only countries in Europe, which are fully equipped with fresh groundwater. Lithuanians consume about 0.5 million cubic meters of water per day, which is only 12–14 percent of all explored fresh groundwater resources. Water quality in the country is very high and is determined by the fact that drinking water comes from deep layers that are protected from pollution on the surface of the earth. Drilling depth usually reaches 30–50 meters, but in Klaipėda Region it even reaches 250 meters. Consequently, Lithuania is one of very few European countries where groundwater is used for centralized water supply. With a large underground fresh water reserves, Lithuania exports mineral-rich water to other countries. Approved mineral water quantity is about 2.7 million cubic meters per year, while production is only 4–5 percent of all mineral water resources.