Lithuania 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. Vilnius is the only Baltic capital that uses centralized
Name of Lithuania original word should have no suffix. A likely candidate is "Lietā". Because many Baltic ethnonyms originated from hydronyms, linguists have searched for its origin among local hydronyms. Usually such names evolved through the following process: hydronym → toponym → ethnonym. A small river not far from Kernavė, the core area of the early Lithuanian state and a possible first capital of the would-be Grand Duchy of Lithuania, is usually credited as the source of the name. This river's original name is Lietava. As time passed, the suffix -"ava" could have changed into -"uva", as the two are from the same