This document summarizes the findings from studies of two small Michigan sub-watersheds; Felton-Herron Creek, a sub-watershed which was utilized to investigate land drainage from a liquid waste disposal area and Mill Creek which was representative of a large fruit growing area. Land application (spray irrigation) of secondary effluent to old fields with various management practices, cultivated row crops and hardwood forest in the Felton-Herron watershed was monitored. Particular emphasis was placed on nitrate and total phosphorus. Proper selection of vegetation, irrigation rate and harvest management minimized nitrogen and phosphorus discharges. Sugar maple forests are inefficient for removing nitrogen from wastewater. Mill Creek was monitored particularly for 57 pesticides and suspended solids to determine pesticide input from tributaries and changes in pesticides content as the creek changes from agricultural to urban land use. With this information scientists evaluated the pesticide and sediment mass leaving the watershed. Though suspended sediment leaving the watershed is not a serious problem considered alone, transport of pesticides is closely tied with sediment movement. Measures to control sediment should control chlorinated hydrocarbons movement.