Jonsvatnet

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Jonsvatnet
Location Trondheim and Malvik, Sør-Trøndelag
Coordinates 63°21′49.40″N, 10°35′3.99″ECoordinates: 63°21′49.40″N, 10°35′3.99″E
Basin countries Norway
Surface area 14.26 km²
Shore length1 43.64 km
Surface elevation 148 m
1 Shore length is not a well-defined measure.

Jonsvatnet is a lake in the municipalities Trondheim and Malvik of Sør-Trøndelag. It is the main source for drinking water for Trondheim.