US streams carry surprisingly extensive mixture of pollutants

Many U.S. waterways carry a variety of pollutants, but not much is known about the composition or health effects of these chemical combinations. A new in-depth study, however, is providing insight as it shows the mixtures are more complex than expected and contain compounds that could potentially harm aquatic species. They say the findings, reported this week in Environmental Science & Technology, could have implications for human health.

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