N.Y.C. Admin. Code § 24-358: § 24-358 Removal of buildings to prevent contamination of the water supply.

The city or its representatives shall not enter upon any lands not taken in pursuance of subchapter three-A of chapter three of title five for the purpose of preserving streams or watercourses from pollution or contamination, or of moving or causing to be moved any buildings, improvements or edifices on the ground that the same may contaminate the water supply, without making a provision for just compensation to the owner of such buildings or improvements for the removal or destruction thereof.