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Lippajärvi (Finnish) or Klappträsk (Swedish) is a district of Espoo, a city in Finland.[1] The district borders Lake Lippajärvi, a small lake with a drainage area of 6.9 km2, which had become heavily polluted due to human dumping since the 1940s.[2][3] In recent years, the lake has been cleaned substantially and now can now be used for swimming.