BI 105A Environmental Biology. Professor Jill Nissen Montgomery College Fall 2006. Water Pollution. Chapter 22. Water Pollution. Any physical or chemical change in water that negatively impacts the health of humans or any other organism. Categories Of Water Pollution. Sewage
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Professor Jill Nissen
During the past two decades, summer-long anoxia has occurred almost yearly in the Chesapeake Bay
Point Source Pollution is pollution that can be traced to a specific site:
Thermal pollution from a power plant
Discharge from a sewage treatment plant
Nonpoint Source Pollution is pollution that enters a body of water over large areas rather than at a single point:
Sediments from construction
Urban runoffPoint & Nonpoint Source Pollution
Types of Water Pollution• Define water pollution.• List and briefly define eight categories of water pollutants.• Discuss how sewage is related to eutrophication, biochemical oxygen demand (BOD), and dissolved oxygen.• Describe water quality issues in the Chesapeake Bay.• Distinguish between oligotrophic and eutrophic lakes.
Water Quality Today• Contrast point source pollution and nonpoint source pollution.
Laws Controlling Water Pollution• Compare the goals of the Safe Drinking Water Act and the Clean Water Act.