The Noor or Langwater (Limburgish: Laankwater) is a river in the Netherlands and Belgium.

The Noor is a right-bank tributary to the river Voer, which later joins the Meuse.

A source of the Noor can be found at the Brigida spring (Dutch: Sint Brigidabron) in the hamlet of Wesch, north of the village of Noorbeek, in the municipality of Eijsden-Margraten, where water wells up from the chalk underground.

[1] The spring and the adjacent 18th century lavoir, named after Brigid of Kildare, patron saint of the village of Noorbeek, form a Dutch national heritage site.

[5] The Noor eventually drains in the river Voer near the village of 's-Gravenvoeren in the municipality of Voeren.