Water Quality Sampling Trends

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B. Water Quality Data

6. Water Quality Sampling Trends

With the vast amount of water quality data available, an analysis was completed that illustrated trends in water quality results in regions that were sampled in multiple years.  In total there were 93 locations that were sampled in multiple years and 56 locations that were only sampled once for a total of 149 locations.  The IBI (fish) and ICI (bug) scores collected by Ohio EPA between 1979 and 2002 were used to determine the trends in water quality data which is displayed in Map 18 (See Appendix I for complete list of historical sampling results).  Of all sampling locations, 43 were improving, 30 were declining, and 20 have stayed about the same.  Map 21 displays the water quality trends in the Darby Watershed.  The majority of sites with declining water quality results were in Franklin and Union County.

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Last updated: November 18, 2008.