This module describes important criteria to use in evaluating land for waste treatment sites and tells where the necessary information for such evaluation can be obtained. Among the important criteria for evaluation are climate, land use of potential site and surrounding areas, topography, drainage characteristics, soil properties, and geology. Climatic data are available for most locations in the United States in monthly and 10-year summaries. Computer programs can be obtained which identify unfavorable and favorable days for waste application in both wet and cold climates. Planning agencies on the local, regional and state level have information on land use. Topographic maps, information on water levels and water quality, and local groundwater conditions are available from U.S. and state geological surveys. Modern soil surveys published since 1960 provide a wealth of data in addition to soil physical properties. Aerial photos show land use, drainage, and topography of the land. (Author/BB)