 The area of Penovsky District is shared between the drainage basins of the Neva, the Western Dvina, and the Volga, and thus the divide between the basins of the Atlantic Ocean and the Caspian Sea runs through the district.The rivers in the minor areas in the north of the district, including the Maryovka River, drain into the Lovat River, a tributary of Lake Ilmen, in the basin of the Neva.The southwestern part of the district belongs to the basin of the Western Dvina, which has its source inside the district, and flows through Lake Okhvat, one of the biggest lakes of the district, before turning south and leaving the district.