The **theoretical atmospheric** **pressure at sea level** (14.7 psi) will support a column of water 34 feet high:

14.7 psi x 2.31 ft/psi = 33.957 ft, or 34 ft

At an elevation of 1 mile above sea level, where the atmospheric pressure is 12 psi, the column of water would be only 28 feet high: 12 psi x 2.31 ft/psi [....]