FEATURE ARTICLE

October 2004

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Emerging Contaminants Affecting Water Quality

As analytical techniques have improved and the environmental toxicological sciences matured, the number of emerging contaminants of concern has dramatically increased. From 1962 when Rachel Carson published Silent Spring until Love Canal in 1977, the primary environmental contaminants included DDT, PCB’s and trace metals, such as mercury, lead and chromium. With the Exxon Valdez spill in 1989, petroleum hydrocarbons and later, chlorinated solvents and fuel oxygenates rose in prominence.