[en] This report provides, on a state-by-state basis, estimates of the quantities and characteristics of low-level radioactive wastes (LLW) generated in the following sectors: commercial nuclear power plants, medical and educational institutions, industry (other than commercial nuclear power plants), and government and military. An estimated 83,800 cm₃ of radioactive waste, containing 886,000 Ci of radioactivity were buried in the four US commercial burial grounds in 1978. Data have been reported on wastes generated from reactor, institutional, and government/military sectors but not from industrial users of radioactive materials. The non-industrial sources account for about 76% of all wastes by volume, and 54% of the recorded activity of the wastes buried. There is no survey information available on the producers of radioactive wastes from non-nuclear fuel-cycle industrial sources. In 1978 this segment may have produced an estimated 24% of the volume and as much as 46% of the activity shipped to commercial burial grounds. A significant portion of the estimates of the quantity and distribution of LLW contained in this report have been obtained by extrapolation or estimation from secondary sources of information. Therefore, the data are preliminary and subject to change or confirmation based on the findings of the extensive survey now underway