1. Copyright © 2009 Pearson Addison-Wesley. All rights reserved.
Chapter 19
Water Pollution
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

2. Introduction
This chapter addresses the complexities associated with the management of water pollution.
Water pollution has unique characteristics and requires specific policy. Recreation benefits are important for water bodies and economies of scale in treating sewage call for different strategies.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

3. Objectives
Present a history of water pollution control policy in the United States.
Give a brief history of European programs.
Discuss the cost-effectiveness of U.S. policy.
Use examples to illustrate some of the potential problems and possible solutions.
Suggest alternatives to ensure cost-effectiveness and positive net benefits.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

4. The Nature of Water Pollution Problems
Types of Waste-Receiving Water
There are two general types of water bodies at risk of contamination from pollution.
Surface water includes rivers, lakes and oceans. Historically, clean-up policies have focused on surface water.
Groundwater is subsurface water.
Groundwater and surface water require different water policies.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

5. Sources of Contamination
Point source pollution is discharged into surface water at a specific location through a drainage pipe or ditch.
The primary point sources are industries and municipalities. Point sources are relatively easy to monitor and predict.
Nonpoint source pollution is runoff that comes from a variety of sources and includes agricultural and urban runoff.
Nonpoint sources are much more difficult to control due to the unpredictability and uncertainty associated with the exact source.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

6. Rivers and lakes
The primary point sources are industries and municipalities. The primary nonpoint sources involve agricultural activity of different forms.
Figure 19.1 illustrates economic efficiency when return flows are contaminated.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

7. FIGURE 19.1 Economic Efficiency When Return Flows Are Contaminated
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

8. Ocean Pollution
The primary sources of ocean pollution are oil spills and ocean dumping.
Though not uncommon, oil spills have decreased since 1970 (Figure 19.2, Table 19.1).
Dumped materials include sewage and sewage sludge, unwanted chemicals, trace materials and radioactive materials.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

9. FIGURE 19.2 The Decreasing Frequency of Oil Spills
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

10. TABLE 19.1 Notable Oil Spills
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

11. Types of Pollutants Fund Pollutants
Fund pollutants are those that can be assimilated by the environment.
Thermal pollution stems from the injection of heat into a watercourse. Usually this is in the form of used coolant water. Raising the temperature of the water reduces dissolved oxygen.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

12. Stock Pollutants
Stock pollutants are those for which the environment has no absorptive capacity.
Persistent pollutants are pollutants that accumulate because they break down so slowly that they can travel long distances in water without changing structure.
Accumulating pollutants are extremely problematic because they are difficult to monitor.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

13. Traditional Water Pollution Control Policy
Early Legislation
The 1899 Refuse Act
The first federal legislation to deal with discharge into the nation’s waterways.
The Water Pollution Control Act of 1948
It initiated the authority of the federal government to conduct investigations and research into water pollution control.
The 1956 Amendments to the Water Pollution Control Act
It provided for federal support for the construction of waste treatment plants and for an enforcement conference.
The Water Quality Act of 1965
It set ambient water quality standards for interstate watercourses. States were required to file implementation plans.
However, state plans were vague and set standards that did not relate to ambient water quality.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

14. Subsequent Legislation Point Sources
The Clean Water Act sets out two goals in its preamble: “that the discharge of pollutants into navigable waters be eliminated by 1985”; and “that wherever attainable, an interim goal of water quality…for fish, shellfish, wildlife and recreation be achieved by June 1, 1983.”
The 1972 Amendments to the Clean Water Act set two stages for meeting the effluent standards.
The 1977 Amendments to the Clean Water Act distinguished between conventional and toxic pollutants
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

15. Nonpoint Sources
Nonpoint source pollution control was not covered by the Clean Water Act. This type of pollution was seen as a state responsibility.
The reauthorization of the Clean Water Act in 1987 provided funding for a program to help states control runoff, but the states held responsibility for nonpoint source pollution control.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

16. The Safe Drinking Water Act
The Safe Drinking Water Act of 1974 provides more stringent standards for drinking water.
The primary regulations set maximum allowable concentrations for bacteria, turbidity and chemical contaminants. Secondary standards for odor and aesthetics were also set. Approximately 60,000 public water systems are subject to these standards.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

17. Ocean Pollution Oil Spills Ocean Dumping Citizen Suits
The Clean Water Act prohibits discharges of “harmful quantities” of oil into navigable waters.
Ocean Dumping
It is covered by the Marine Protection Research and Sanctuaries Act of 1972.
Citizen Suits
Through citizen suits, private individuals or groups are authorized to exercise oversight over government actions and to initiate civil proceedings against a polluter violating an effluent standard.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

18. Efficiency and Cost-Effectiveness
Ambient Standards and the Zero-Discharge Goal
The shift from ambient standards to a zero discharge goal was problematic.
The feasibility of meeting such a goal is small and thus enforcement is a problem.
For some pollutants, such a high cost might be justified. However, the zero discharge goal does not distinguish among pollutant types.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

19. National Effluent Standards Enforcement Problems:
Cost-effectiveness would require individual standards for each source, but the EPA chose general standards for broad categories of sources. The standards could differ among categories, but were uniformly applied with categories.
Allocating Control Responsibility
Studies have shown that uniform standards do not closely approximate the least-cost allocation. Table 19.2 presents some comparisons.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

20. TABLE 19.2 Empirical Studies of Water Pollution Control
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

21. Municipal Waste Treatment Subsidies
The Allocation of Funds
Under the Municipal Wastewater Treatment Construction Grant Amendments of 1981, states were now required to establish project priorities and target funds to the most significant needs.
Operation and Maintenance
Operation and maintenance costs would be paid by the municipality. This type of program provides incentives to build expensive plants.
Local areas pay only a fraction of the true construction cost.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

22. Pretreatment Standards
Nonpoint Pollution
Nonpoint source pollution has become a significant part of the total water quality problem. More intensive controls have been placed on point sources as an attempt to compensate for nonpoint sources.
Studies suggest that some nonpoint sources could be controlled at low costs, especially with policies aimed at reducing nitrogen use.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

23. TABLE 19.3 Summary of NPDES Trading Programs That Have Traded at Least Once as of June 2007
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

24. Atmospheric Deposition of Pollution
Wet deposition refers to pollutants that travel to the ground with rainfall.
Dry deposition occurs when pollutants become too heavy and fall to the ground.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

25. The European Experience
In Europe, economic incentives such as effluent charges play a much larger role.
Developing Country Experience
Noncompliance and lack of infrastructure has hampered many water pollution control programs.
Water pollution is complicated by poverty.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

26. Oil Spills
Legal solutions have very high administrative costs and take enormous amounts of time.
Vessel owners will choose the level of precaution that equates the marginal cost of additional precaution with the marginal expected penalty (See Figure 19.3.)
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

27. FIGURE 19.3 Oil Spill Liability
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

28. Citizen Suits
Citizen suits have been on the rise, in part due to lax public enforcement. Under the Clean Water Act, attorney’s fees incurred by citizens’ groups in successful actions must be paid by the defendant.
Citizens suits lead to greater compliance, but complete compliance is not necessarily efficient if the defendant polluters face inefficiently high standards.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

29. Water Quality, Watershed Based Trading and GIS
Land use change significantly affects watershed health.
Agricultural and urban runoff into rivers, streams and estuaries is the largest contributor to water pollution.
Study suggests that water quality trading program should take into account land uses as well as overall watershed health.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.

30. An Overall Assessment
The use of cost-effective policies would reduce costs substantially while not affecting the benefits.
Economic incentives would also facilitate change better than technology-based standards that are rigid.
The possibilities of using marketable permits for water pollution control are being explored for many bodies of water in the U.S. Permits have value and thus will encourage firms to try to minimize costs.
Economic incentives put pressure on sources to find better ways to control pollution.
Copyright © 2009 Pearson Addison-Wesley. All rights reserved.