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).
The salt content of water is given as parts per thousand (ppt), i.e. the amount of salt (g) dissolved in 1,000 g of water. Common salt (sodium chloride) is the main dissolved solid in seawater, and the average salinity is 35 ppt.he salt content of water is given as parts per thousand (ppt), i.e. the amount of salt (g) dissolved in 1,000 g of water. Common salt (sodium chloride) is the main dissolved solid in seawater, and the average salinity is 35 ppt.