A thermodynamic model is presented for determining the distribution of
pollutants in the various compartments of the global environment. The
data needed to use this model are the vapor pressure, infinite diluti
on activity coefficient, Henry's law coefficient and/or solubility in
water, and the octanol-water partition coefficient. It is only this la
tter quantity, which involves liquid-liquid equilibrium, that traditio
nally has not been measured by thermodynamicists. We also report infin
ite dilution and Henry's law coefficient measurements for some U.S. En
vironmental Protection Agency Priority Water Pollutants.