Industry is the source of employment and one of the pillars of self-sustained nation. This led to the establishment of various industrial units across the nation. Although, before disposal industrial pollutants are generally subjected to conventional treatment processes, but even after that their disposal has created problem of environmental safety and health. During such conventional treatment processes, large organic and inorganic content is transferred to sludge, which are either sold as natural fertilizers or disposed-off. Various methods of toxicological and safety evaluations are being used for reduction of pollution load. This book primarily focuses on the methods which can be used for toxicological evaluation of environmental pollutants for their safe disposal. This book is very useful for University students studying environmental sciences, course lecturers, environmental engineers, civil engineers, environmental activists, researchers working in the field of toxicology and environmental sciences.