This report describes the inventory system developed to provide a comprehensive data base for emission of materials to the atmosphere which are judged to be of environmental concern in the AOSERP study area. A detailed evaluation of man-related activities and natural processes within the area was made, and the accumulated data entered into a computerized data retrieval system. The system has the capability to add, delete, change, and report information by a variety of selection criteria. The inventory system is operated by Alberta Environment, Air Quality Control Branch. An evaluation of the data shows organic emissions to be largely of natural origin. In addition, natural sources contribute substantial quantities of oxides of nitrogen and ammonia. For all other emissions considered, man-related activities accounted for most; industrial development was the prime cause. Estimated values of emissions from natural sources has been identified as an area where further study is required to develop better precision.