"The first two decades of the U.S. Geological Survey's National Water Quality Assessment (NAWQA) Program have provided a successful and useful assessment of U.S. water-quality conditions, how they have changed over time, and how natural features and human activities have affected those conditions. Now, planning is underway for the third decade (Cycle 3) of the Program outlined in the Science Plan, with challenges including ensuring that the NAWQA...

"Water pollution is a major form of environmental degradation. The primary causes of water pollution are pathogens, chemicals released from factories, sewage, etc. Water pollution is classified into three categories, namely, point source pollution, non-point source pollution and groundwater pollution. This book aims to elucidate these varied types of water pollution, their causes and strategies to mitigate such pollution. The topics included herein...