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
Echo Lake Country Club Echo Lake Country Club Echo Lake Country Club is a private, member-owned country club located in Westfield, New Jersey. The club was founded in 1899 and the golf course was designed by Donald Ross in 1913. The club was founded as the Cranford Golf Club in 1899 and a 9-hole golf course was designed by Willie Dunn on Lincoln Avenue in Cranford, New Jersey. Cranford businessmen and trading-stamp magnates Thomas Sperry and William Miller Sperry were executives of the Cranford Golf Club on Lincoln Avenue, formerly known as Westfield Avenue and part of the Old York Road. The club's 19th-century