Contents: Review of literature; Experimental and survey studies; Design practice (House sewers, septic tanks, subsurface disposal systems, seepage pits, cesspools); Design practice outside the United States (Canada, England, India, Australia, New Zealand, South Africa, Rhodesia, Germany, Poland, Venzuela, Ecuador, Dominican Republic); Study of experimentally operated septic tanks; Study of septic tanks in field, sludge and scum accumulations; Laboratory investigation of sludge, yeast, as starters; Experimental investigation effect of zeolite softener salts on digestion; and Survey of information on the freezing aspects of household sewage.