Rivers and lakes have long been used as waterways, although, with the exception of the Nemunas River in the south of the country, they are not very suitable for navigation. Within the country, there are 722 rivers over 10 kilometers (km) long and 21 of them are more than 100 km long. Most of the rivers flow across the middle lowland and the western part of the Zemaiciai upland.
The Nemunas basin. It is by far the largest river basin in the country, covering 65.9% of the country. The Nemunas River rises in Belarus and enters Lithuania in the south. It flows first north and then turns to the west. It becomes the border between Lithuania and the Russian Federation before flowing into the Baltic Sea. Its major tributaries are the Neris River, rising in Belarus, and the Sesupe River, rising in Poland.
• The Lielupe basin. It covers 16.4% of the country. Several rivers, such as the Svete, Musa, and Memele, rise in the north of Lithuania. They flow into Latvia and become the Lielupe River after their confluence.
• The Venta basin. It covers 9.1% of the country. The Venta River rises in the northwest of Lithuania and flows into Latvia.
• The group of coastal basins. They cover 4.4% of the country.
• The Daugava River basin. It covers 4.1% of the country in the northeast. The Daugava River itself does not flow in Lithuania. Some tributaries, rising in Lithuania, flow northeast into Latvia, where they flow into the Daugava River.
• The Pregel basin. It covers less than 0.1% of the country in the southwest. It drains west into the Russian Federation.
The World Bank reports that at least 80 countries have water shortages and 2 billion people lack access to clean water. More disturbingly, the World Health Organization has reported that 1 billion people lack enough water to simply meet their basic needs, unfortunately in many countries water is scarce or contaminated.
Pure Aqua provides wide range of filtration and economical solutions based on the Lithuania's water resources.
Lithuania's main water resources are:
- Surface water “is water from river, rain water, lake or fresh water wetland, which can be treated using different methods, such as Ultrafiltration Systems, Media Water Filters, Brackish Water RO.
- Desalination can be used for water from ocean, or sea source, which can be treated using Sea Water Reverse Osmosis Systems; Desalination Systems
- Ground Water or brackish water is from water located in the pore space of soil and rock “Borehole well”, which can be treated using Reverse Osmosis Systems, Media Water Filters, Chemical Dosing, UV Sterilizers.
- Government water supply, which could have high level of hardness or high level of chlorine, can be treated with Water Softeners, Media Water Filters
Pure Aqua manufactures water treatment systems that meet the World Health Organization requirements.