CCQ-1991 - Civil Code of Québec

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979. Lower land is subject to receiving water flowing onto it naturally from higher land.
The owner of lower land has no right to erect works to prevent the natural flow. The owner of higher land has no right to aggravate the condition of lower land, and is not presumed to do so if he carries out work to facilitate the natural run-off or, where his land is devoted to agriculture, he carries out drainage work.
1991, c. 64, a. 979.