Examples of point and nonpoint sources of pollution

Point Nonpoint Sources

are indicated on the left side of the indicated on the right side of the river.

river.

source: "Figure 3. Examples of Point and Nonpoint Sources of Pollution," in Water Quality: Key EPA and State Decisions Limited by Inconsistent and Incomplete Data, U.S. General Accounting Office, Washington, DC, March 2000

are indicated on the left side of the indicated on the right side of the river.

river.

source: "Figure 3. Examples of Point and Nonpoint Sources of Pollution," in Water Quality: Key EPA and State Decisions Limited by Inconsistent and Incomplete Data, U.S. General Accounting Office, Washington, DC, March 2000

money to the states to help develop groundwater programs. The Safe Drinking Water Act of 1974 (SDWA; PL 93-523) and the Safe Drinking Water Act Amendments of 1996 (PL 104-182) require communities to test their water to make sure it is safe and help communities finance projects needed to comply with SDWA regulations. The 1976 Resource Conservation and Recovery Act includes many programs designed to clean up hazardous waste, landfills, and underground storage tanks. New storage tanks must be made of strong plastics that will not rust or leak contaminants into the water table.

The Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (PL 96-510) and the Superfund Amendments and Reauthorization Act of 1986 (PL 99-499; PL 99-563; and PL 100-202) require the cleanup of hazardous wastes that can seep into the groundwater. These two laws also require that cities and industry build better-managed and better-constructed garbage dumps and landfills for hazardous materials so that groundwater will not be polluted in the future.

The Federal Insecticide, Fungicide, and Rodenticide Act (61 Stat 163; amended 1996, PL 100-532) regulates dangerous chemicals used on farms (http://www.epa.gov/ region5/defs/html/fifra.htm). The act requires the EPA to register the pesticides farmers use against insects, rats, mice, and so on. If the EPA thinks the pesticides might be dangerous to the groundwater, it can refuse to register them.

the status of the clean water act. Both political conservatives and environmentalists credit the Clean Water Act with reversing, in a single generation, what had been a decline in the health of the nation's water

Precipitation

Landslide

Tributaries

Earthflow iWindstorm

Agricultui

Industry รข

Water treatment facility

Riparian zon<

Watershed divide

Wetland jundwatei

Percolation

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