7.3 Government and laws on the environment  (Page 8/7)

Learning objectives

After reading this section, students should be able to

• understand the purpose of government regulations set for the protection of human health and the environment
• distinguish the current environmental laws and regulations for various types of pollutants present in different media or phases of the environment
• discern the need for future environmental laws as related to the sustainability of industrial activity and the economy

Introduction

In the United States, the laws and regulations pertaining to the protection of the environment have been enacted by the U.S. Congress. The U.S. Environmental Protection Agency (EPA) is authorized to enforce the environmental laws and to implement the environmental regulations. The United States environmental laws cover various phases of the environment such as water, air, and hazardous waste, where most of the regulations have been based on the risk assessment of the pollutants. The major environmental laws and regulations are briefly listed in the Table Summary of Major Environmental Laws .

Water

Clean water act

To protect the surface waters of the United States such as lakes, rivers, streams, shorelines and estuaries, the Federal Water Pollution Control Act was established in 1956. The amendment to the Federal Water Pollution Control Act (FWPCA) of 1972 focused on surface water quality goals, effluent limits based on available technology, and a national discharge permit system. The FWPCA (1972) introduced effluent limits for chemical substances in surface waters in conjunction with a National Pollutant Discharge Elimination System (NPDES) allowing for enforceable control over permits obtained by industry for discharge of effluents containing pollutants into natural water systems. The Clean Water Act (CWA) of 1977 placed emphasis on the control of waterborne toxic substances released into natural surface waters. The CWA introduced a Priority List of Pollutants which includes 127 toxic chemical substances including synthetic organic compounds and heavy metals. In accordance with the CWA, the EPA must establish effluent limitations for chemical substances on the List of Priority Pollutants for discharge by industrial facilities and municipal wastewater treatment plants.