Lake Onega water per year, of which 46% are industrial and household water, 25% is stormwater runoff and 16% is melioration-related drainage. This drainage contains of phosphorus and of nitrogen; respectively of these elements are removed through the River Svir whereas the rest accumulates in the lake. Ships and motor boats (about 8,000 units) bring oil pollution at the level of about per navigation year, as well as phenols (), lead () and oxides of sulfur, nitrogen, and carbon. The lake basin is a major source of granite, marble and black schist in Russia which have been exploited in the area since
Daniel Onega all time Copa Libertadores topscorers list with 31 goals in 47 games. In 1972 Onega moved to Racing Club for a season, but he only managed 9 goals and returned to River the following season. In 1973, he moved to Spain to play for Córdoba CF in the Spanish 2nd division, he stayed with the club until 1978 when he moved to Millonarios in Colombia. It was with Millonarios that he won his first and only league title. At the end of the 1978 season Onega retired from football. Daniel Onega Daniel Onega (born March 17, 1945) is a retired