About 400 mln BGN will be invested in the next 3-4 years into the water supply system of Plovdiv and its region, the deputy minister of regional development and welfare, Dimcho Mihalevski, announced. 260 mln of those will be distributed for the water supply of the city and another 16 towns and viollages within the Vucha Dam infrastructure, while the rest will be invested in the drainage and sewing system of the region.