NAWQA Studying Water Quality Over Time

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=sOKAuj3WeNs

http://gallery.usgs.gov/videos/914 • Follow a U.S. Geological Survey hydrologist as he takes part in the National Water-Quality Assessment Program in the Pacific Northwest. In 1991, the U.S. Congress established the program to develop long-term, nationally consistent information on the quality of the Nation’s streams and ground water, and thereby support scientifically sound decisions for water-quality management, regulation, and policy decisions. The objectives of NAWQA are to assess the status and trends of national water-quality conditions and to understand the factors and processes that govern those conditions, thus, addressing the questions: • 1. What is the quality of the Nation's streams and ground water? • 2. How is water quality changing over time? • 3. How do natural factors and human activities affect the quality of streams and ground water?

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