This book is all about the novel applications of artificial intelligence & machine learning (AIML) in various types of waste management and waste water treatment. AIML plays a crucial role in smart as well as sustainable management of waste, including municipal solid waste, plastic waste, e-waste, biomedical waste, construction and demolition waste, health security air & water pollution control and waste water treatment. Some commonly used waste management and waste water treatment AIML tools are support vector machine (SVM), artificial neural network (ANN), adaptive neuro-fuzzy inference system (ANFIS), and k-nearest neighbours (KNN), Convolutional Neural Network (CNN), You Look Only Once (YOLO), Genetic Algorithm(GA), capacitated vehicle routing problem (CVRP). This new approach primarily involves applying pertinent AIML studies and developing useful goods to waste dumping, classification collection, sorting methods and waste water treatment.