Abstract
Lithuania relies exclusively on groundwater for drinking water supply. Under favourable climatic and geological conditions, a thick zone of fresh groundwater forms. Shallow groundwater is contained in quaternary deposits, but because of insufficient resources (quantitative and qualitative) it is used mostly in dug wells in countryside and settlements. Exception is river valleys and sandy plain where shallow groundwater is used for public water supply. Confined groundwater is contained in sediments of different age, lithological and chemical composition. The most productive are 10 major confined aquifers. Available groundwater resources makes ∼3.6 million cubic metres/day.
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