Study Identifies Contaminants From Wastewater Treatment Plants, Storm Runoff Flowing Into Columbia

Human activities, such as industrial production, transportation, and day-to-day living, are sources of many contaminants that flow into the Columbia River.

A recently completed reconnaissance study detected hundreds of these contaminants in water samples collected from wastewater-treatment-plant effluent and storm runoff from roads and other urban environments in nine cities that line the Columbia River in Oregon and Washington.

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