Trends in Surface-water Quality at Selected Ambient-monitoring Network Stations in Kentucky, 1979?2004

Increasingly complex water-management decisions require water-quality monitoring programs that provide data for multiple purposes, including trend analyses, to detect improvement or deterioration in water quality with time. Understanding surface-water-quality trends assists resource managers in identifying emerging water-quality concerns, planning remediation efforts, and evaluating the effectiveness of the remediation. This report presents the results of a study conducted by the U. S. Geological Survey, in cooperation with the Kentucky Energy and Environment Cabinet?Kentucky Division of Water, to analyze and summarize long-term water-quality trends of selected properties and water-quality constituents in selected streams in Kentucky?s ambient stream water-quality monitoring network.