The purpose of the study was to establish research data bases from a series of extramural and intramural research studies, to demonstrate data management and analysis systems which allow easy access and manipulation of the data, and to demonstrate the use of the system to a number of potential users. The study has led to an extensive collection of drinking water research data at one single location in an easily accessible form. Some preliminary analyses illustrate the ways in which interactive data analysis may be undertaken and how data bases for various sources may be merged. The use of microcomputers in laboratories, in the field and in small water treatment plants is described and their advantages and limitations are explored.