William P. Cunningham University of Minnesota Mary Ann Cunningham Vassar College Copyright ? The McGraw-Hill Companies, Inc. Permission required for reproduction or display. *See PowerPoint Image Slides for all figures and tables pre-inserted into PowerPoint without notes. Chapter 18 Lecture Outline* Water Pollution Outline Types and Effects of Water Pollution Point vs. Non-Point Sources Water Quality Today Surface Water Groundwater Ocean Water Water Pollution Control Source Reduction Municipal Sewage Treatment Water Legislation Clean Water Act (1972) Water Pollution Any physical, biological, or chemical change in water quality that adversely affects living organisms or makes water unsuitable for desired uses can be considered pollution.