The bible of the water quality industry updated to reflect the latest trends, technologies, and regulations Operations of Municipal Wastewater Treatment Plants MOP 11 is the industry flagship book, focusing on the operation and maintenance of municipal wastewater treatment plants. Presented in three shrinkwrapped, hardcover volumes, this classic resource incorporates the experiences, best practices, and innovations from thousands of wastewater plants. Taken as a whole, these three volumes represent the most complete package of information available to the wastewater treatment industry.