Welcome To Whitehall Township Whitehall Township is located in the center of the Lehigh Valley. The Township is one hour north of Philadelphia and an hour and half from New York City.
SALINITY OVERVIEW Salinity is the concentration of dissolved salts in water, usually expressed in parts per thousand (ppt). Objects float higher in salt water than fresh water because salt water is denser (heavier per unit of volume).
Salinity is the measure of all the salts dissolved in water. Salinity is usually measured in parts per thousand (ppt or). The average ocean salinity is 35ppt and the average river water salinity is 0.5ppt or less.