Any such municipality shall be and is hereby empowered to acquire and hold, by purchase or condemnation, such lands, along and contiguous to the streams of water or reservoirs from which water is taken for public use, as may be necessary to preserve them from contamination: Provided, That no land shall be taken for the uses mentioned in this act until just compensation shall have been made for property taken, injured, or destroyed, which shall be paid or secured before such taking, injury or destruction.
53 P.S. § 2992