This booklet provides basic information on septic system use and maintenance. Written for current and prospective homeowners, it offers guidelines for proper operation of household septic systems. In addition, (1) components of individual systems are diagrammatically explained; (2) suggestions for maintenance are outlined; (3) problem areas and potential health hazards are identified and discussed; (4) recommendations for the selection of a site are given; and (5) installation and maintenance procedures are specified. Information sources and a list of references on septic systems are also included. (ML)