This research program was initiated with the overall objective of obtaining relevant design parameters and capital and operating costs of both adsorption and aeration techniques for the removal of specific organic contaminants from the City of Glen Cove's drinking water supply. Major contaminants present are trichloroethylene, tetrachloroethylene, cis-1,2-dichloroethylene, and 1,1,1-trichloroethane. A pilot plant was constructed and operated by using water from one of the city's contaminated wells and treating a portion of it via synthetic resin (Ambersorb XE-340) and diffused aeration. Resin depths of one foot, two feet, and four feet were used, and in most cases, virgin resin lowered the concentration of all contaminants of concern to below 1 microgram/L. Steam regeneration of the exhausted resin took place, but, although promising, the results achieved in the laboratory by the resin manufacturer could not be duplicated under pilot plant conditions. Aeration tests were conducted at air to water ratios of 30:1, 20:1, 15:1 and 5:1 and 60-95 percent removals were obtained.