The report describes the feasibility of determining the rate of increase of 85Kr in environmental air caused by the discharge of the gaseous waste product from nuclear facilities. Compressed air was acquired from commercial suppliers in widely distributed locations throughout the United States. Krypton was separated from the air and counted by liquid scintillation. Comparison was made with previous determinations. Concentration versus time relations are presented to show any increased levels as more nuclear facilities go into operation. The results are analysed to determine if statistically significant differences in levels exist between sampling locations. Variations and concentrations at a given location are also evaluated. Public exposure doses are calculated. Comments are offered relative to the future significance of 85Kr in environmental radiation with projected growth in the nuclear industry. Based on the above study, the feasibility of operating a national network is presented, including recommended number of stations, mode of sampling and sampling site selection. (Author)