New water reservoirs are not developed, so it is even more important to protect the existing reservoirs from pollution. Thirty per cent of the population is supplied from surface water sources. Among these, the most important is the Dniester River, which supplies about 83 per cent of the total amount of water abstracted. The volume of water abstracted from surface water sources was about 721 million m3 in 2011. The Dniester and Prut Rivers mark the borders of the country with Ukraine and Romania. Surface water has to be transported to the centre of the country.