Conducting simple analyses, routinely and consistently, is key to understanding the microbiological workings of the wastewater treatment plant. In other words, doing the same thing (no matter how simple or how complicated), the same way on a regular basis, can be a valuable tool for the most sophisticated treatment system and the most simple. It is my goal that this book would serve as a practical guide and reference to assist you in developing simple procedures to incorporate microbiological observations into your everyday process control program.