Although we have 25 million septic systems in the United States and about 400,000 new systems each year, they remain a mystery for most people. With entertaining text and humorous graphics, this book explains how they work, how they should be treated (what should and should not go down the drain), how they should be maintained, and what to do if things go wrong. Not an engineering treatise but a great basic manual for the average homeowner. Also covers composting toilet systems, designs for simple graywater systems, and some of the typical alternatives to the standard, gravity-fed septic system. An excellent chapter on small town system upgrades and a fascinating chapter on the history of waste disposal.