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Introduction to Water Pollution

Introduction to Water Pollution. Target: Describe sources of water pollution the effects of different pollutants in the water. What are the major categories of water pollutants? Provide examples, major human sources, and harmful effects. Infectious Agents. Oxygen-Demanding Wastes.

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Introduction to Water Pollution

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  1. Introduction to Water Pollution Target: Describe sources of water pollution the effects of different pollutants in the water.

  2. What are the major categories of water pollutants? Provide examples, major human sources, and harmful effects.

  3. Infectious Agents

  4. Oxygen-Demanding Wastes

  5. Inorganic Chemicals

  6. Organic Chemicals

  7. Plant Nutrients

  8. Sediment

  9. Radioactive Materials

  10. Heat- Thermal Pollution

  11. How do we measure water quality? WQI – • Temperature • pH • DO • BOD • Turbidity • Nitrates • Phosphates • Fecal coliform bacteria • Macroinvertebrates

  12. Healthy Ranges for Fecal Coliform and DO • Drinking water: 0 colonies/ 100 mL • Swimming: 200 colonies/ 100 mL • Raw sewage: several million colonies/ 100 mL • Good: 8-9 ppm at 20 degrees C • Moderately polluted: 4.5-6.7 ppm at 20 degrees C • Gravely polluted: below 4 ppm at 20 degrees C

  13. What is the difference between point and nonpoint source pollution? • Point: pollutants discharged at specific locations through drain pipes, ditches or sewer lines. • Example: factories, sewage treatment plants, underground mines, and oil tankers • Nonpoint: pollutants scattered and diffused which cannot be traced to any single site of discharge. • Example: acid deposition and runoff from croplands, feedlots, logged forests, urban streets, lawns, golf courses, and parking lots.

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