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
Lake Naivasha Country Club Lake Naivasha Country Club The Lake Naivasha Country Club is located on the opposite shore of Lake Naivasha from the town of Naivasha, Kenya. Built using old colonial architecture and opened in 1937, Lake Naivasha Country Club provides accommodation in rooms and cottages across 12 hectares (55 acres) of green lawns shaded by mature acacias and fever trees. The public rooms also display the British colonial style. The residents' lounge has a massive fireplace and large bay windows. The bar adjoins a billiards room, for playing billiards and snooker in the British tradition. Views across Lake Naivasha are dominated by