Judarn is a small lake in Bromma, a western suburb of Stockholm, Sweden. Surrounded by forest and the Judarskogen nature reserve, it stretches between Åkeshov and Södra Ängby. Three other lakes are found nearby: Kyrksjön, Lillsjön, and Råcksta Träsk. The name is etymologically associated to ljuda, the verb "to sound".
Judarn is a small lake in Bromma, a western suburb of Stockholm, Sweden. Surrounded by forest and the Judarskogen nature reserve, it stretches between Åkeshov and Södra Ängby. Three other lakes are found nearby: Kyrksjön, Lillsjön, and Råcksta Träsk. The name is etymologically associated to ljuda, the verb "to sound".
== Characteristics == With an area of 74,000 square metres and an average depth of 2.7 metres (maximum 3.7 m), the lake contains 180,000 cubic metres of water and is supplied by a drainage area of 0.8 km². Originally supplying lake Lillsjön, Judarn today discharges into lake Mälaren. Regarded as one of the least contaminated lakes in Stockholm, Judarn receives storm water from a nearby traffic route which gives it considerable levels of lead resulting in a bathing ban, metal content otherwise being low and phosphorus levels moderate. The lake, considered as being of great recreational and natural value, is part of the nature reserve Judarskogen and has a rich flora and fauna with many aquatic plants, birds, and frogs. Its isolated location combined with low levels of chlorophyll makes Judarn one of the clearest lakes in Stockholm, and notwithstanding low levels of oxygen nutrient content is low even during winters, with raised levels of PAH and PCB in deep sediments.
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