Onega River Kozhozero, as well as Kenozersky National Park. The whole valley of the Onega is populated, with the exception of the stretch between Severoonezhsk and Yarnema, in Plesetsky District. There are two towns located on the Onega River, Kargopol close to its source and Onega in its mouth. There are also two urban-type settlements, located opposite to each other in the middle course of the river, Oksovsky (right bank) and Severoonezhsk (left bank). of the river's lower course, between the village of Gorodok and the selo of Porog, is listed in the State Water Register of Russia as navigable. The rest
Lake Onega dace, silver bream, carp bream, sabre carp, spined loach, wels catfish, European eel, rudd, ide, gudgeon, pike-perch, European perch, ruffe and burbot. Whereas the area of the lake used to be clean, the pollution level is gradually increasing, especially in the northwestern and northern parts which contain the industrial facilities of Petrozavodsk, Kondopoga and Medvezhyegorsk. About 80% of the population and more than 90% of industry of the basin are concentrated in these areas. The pollution from these three cities amount to about of sewage and drainage water and of emissions per year. Human activity results in about of drain