1. List seven types of water pollutants and give an example of each. List three strategies to determine the presence of infectious agents in water.
2. Distinguish between point and nonpoint sources of pollution. Summarize the three major sources of water pollution.
3. Draw an oxygen sag curve to illustrate what happens to dissolved oxygen levels in streams below points where degradable oxygen-demanding wastes are added. Compare problems of lake water pollution to those of stream pollution.
4. Describe the
difference between eutrophication and cultural eutrophication. How can cultural
eutrophication be prevented or cleaned up? State three lessons learned by the
5. Describe what is
happening to the quality of coastal waters and how coastal waters can be
protected. State one ecological principle illustrated by the
6. List the major pollutants of groundwater. Explain why cleanup of groundwater is so difficult. List six ways to prevent and three ways to cleanup groundwater pollution.
7. Briefly describe two
major laws that protect water quality in the
8. Discuss how public drinking water is purified and how the U.S. Safe Drinking Water Act helps to ensure that drinking water is clean.
9. List three strategies to shift emphasis from pollution cleanup to pollution prevention strategies and several ways that individuals can contribute to a reduction in water pollution.
advanced (tertiary) sewage treatment (p. 511)
biological oxygen demand (BOD)
cultural eutrophication (p. 499)
dissolved oxygen (DO) (p. 496)
eutrophication (p. 499)
nonpoint sources (p. 494)
oxygen-demanding wastes (p. 504)
point sources (p. 494)
primary sewage treatment (p. 510)
secondary sewage treatment (p. 510)
septic tank (p. 510)
water pollution (p. 494)