Kyrksjön () is a small lake in Bromma, a western suburb in Stockholm, Sweden. Named after its vicinity to the old Bromma Church, the lake was made part of the nature reserve Kyrksjölöten in 1997. Three other lakes are located near Kyrksjön: Judarn, Lillsjön, and Råcksta Träsk.
Kyrksjön () is a small lake in Bromma, a western suburb in Stockholm, Sweden. Named after its vicinity to the old Bromma Church, the lake was made part of the nature reserve Kyrksjölöten in 1997. Three other lakes are located near Kyrksjön: Judarn, Lillsjön, and Råcksta Träsk.
== Characteristics == With an area of 6,7 hectares and average depth of 1,5 metres (maximum 2,5 metres), Kyrkosjön contains 80,000 cubic metres of water and is supplied by a drainage area of 48 hectares. The lake is thus small and shallow, with no feeder or storm water conduit connected to it. The lake is surrounded by one of the biggest broadleaf forest in Stockholm rich in various species of birds, batrachians, and bats. Levels of phosphorus and nitrogen have decreased since the 1980s. Metal levels are low and the waters are moderately clear. Two bathe are located at Kyrkosjön, which is considered to be of significant recreational and natural value. Sewers from a nearby allotment-garden and a traffic route produces some input flow, but normally not enough to even produce an outflow. Historically considerably larger, Kyrksjön used to extend well into the Spånga parish and its outflow used to discharge through a nine metres tall white water. The lake was lowered to the present level in 1863 which resulted in today's stagnant lake, notwithstanding later attempts to reopen the outflow.
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