This is a thorough, non-technical handbook and guide to the basics of septic systems — the physical process that takes place in the septic system and the simple technology needed to make it work. Emphasis is on conventional septic systems powered by gravity flow, filtering through soil, and the natural soil organisms that purify sewage. The book covers, in addition to septic tanks and drainfields, septic system maintenance, what to do if things go wrong, and alternative systems such as mounds and sand filters. There are also chapters on greywater systems, composting toilets, and a unique history of waterborne waste disposal.

Until now there has not been a comprehensive, nontechnical book for homeowners about the intricate workings of a septic system—what it is, how it works, and how to maintain and repair it.