Sværsvann

{{Infobox body of water

| name = Sværsvann

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| image = Sværsvann (juni 2020 bilde01).jpg

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| location = Oslo, Norway

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| coordinates = {{coord|59|49|01|N|10|53|23|E|type:waterbody_source:kolossus-nowiki|display=inline,title}}

| type = lake

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| outflow = Hobølelva

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| pushpin_map = Norway

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| pushpin_map_alt = Location of the lake in Norway.

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Sværsvann is a lake in the southeast of Oslo, Norway. The lake drains off into the river Hobølelva. The lake's surrounding areas are mostly residential. Sværsvann is a popular bathing place, and the name is believed to origin from "Sværd Vandet", which means "Sword Water", because a sword was once found at the bottom of the lake.{{cite web|title=Sværsvann|url=http://www.skiforeningen.no/markadb/showpoi.cgi?id=263|publisher=Skiforeningen|access-date=11 November 2010|archive-url=https://web.archive.org/web/20110727191830/http://www.skiforeningen.no/markadb/showpoi.cgi?id=263|archive-date=27 July 2011|url-status=live|language=no}} The bottom water contains huge amount of salts, organic nutrition and hydrogen sulfid.{{cite web|title=Sværsvann|url=http://www.vann-og-avlopsetaten.oslo.kommune.no/vassdrag_og_fjord/bynare_innsjoer/svarsvann/|publisher=Municipality of Oslo|access-date=11 November 2010|archive-url=https://web.archive.org/web/20110720071403/http://www.vann-og-avlopsetaten.oslo.kommune.no/vassdrag_og_fjord/bynare_innsjoer/svarsvann/|archive-date=20 July 2011|url-status=live|language=no}}