Contents: 1. Introduction. 2. Impact of toxic pollutants on aquatic fauna and flora of Yamuna river and its implication on human health. 3. Community based tank irrigation management systems in Tamilnadu, India. 4. Wastewater quality characteristics at Shella (East Khasi Hills), Meghalaya, India. 5. Bioremediation. 6. Water and wastewater management. 7. Synthesis of K3 [Fe (C2O4)3]-Kaolin nanocomposite and degradation of leachate by K3 [Fe (C2O4)3] - Kaolin nanocomposite. 8. Waste management.