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 typically measured as a concentration of grams of salt per kilogram of water. (g/kg). This quantity is equal to the measure of parts salt per thousand parts water (ppt). For example, 20 grams of salt per kilogram of water is equal to 20 parts salt per. thousand parts water (that is, 20 g/kg = 20 ppt).