The terrestrial portion of the Northern Michigan Environmental Research Program has discovered that 1) acid rainfall is not a problem in Michigan except for local instances; 2) ground water quality is very good through northern lower Michigan except in a few isolated wells; 3) ground water quality does correlate well with land use patterns and indicates a future problem in water quality unless steps are taken to insure proper fertilization levels, housing densities, usage, etc.; 4) nutrient budget determiation for many of the lakes indicate that some lakes are receiving very high levels of nutrients (nitrogen and phosphorus) inputs from septic tanks, drainage and runoff. The data is extremely useful in the future management of these areas; 5) the first bedrock, glacial drift and depth to clay map was produced for this study region and will be extremely useful to future planning of disposal sites, placement of wells, building sites, drainage sites, construction of sewerage systems and sites, drainage patterns determinators; and 6) a simulation model was developed and can be updated to predict the effects of new development or changes in input on lake water quality.