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Water-Year Summary for Site 01473169
As of October 2013, results from discrete water quality samples collected at this site are available through the U.S. Geological Survey National Water Information System web interface on the "Water Quality for the Nation" webpage.
The reporting precision of the turbidity probe in low turbidity is +/- 0.3 FNU, therefore the lowest reportable value, 0.0 FNU, does not necessarily indicate a condition of zero turbidity. Interruptions in the record due to malfunction of the equipment. Water-quality samples were collected as part of the Chester County Biological Monitoring project. Some samples were collected as part of the Delaware River National Water-Quality Assessment program (DELR NAWQA).
Suspended- sediment discharge was computed using methods described in Sloto, R.A., and Olson, L.E., "Estimated suspended-sediment loads and yields in the French and Brandywine Creek Basins, Chester County, Pennsylvania, water years 2008-09: U.S. Geological Survey Scientific Investigations Report 2011-5109. The equation for computing suspended-sediment concentration was "log SSC = 0.9727 log (Turbidity) + 0.2749" Suspended Sediment Discharge mistakenly published with wording "Mean" rather than "Total" tons/day for water years 2008 to 2013. The numbers represented in the tables are correct.
Records for water year 2014 turbidity are rated fair. Records for water year 2015 turbidity are rated fair. Records for water year 2016 turbidity are rated fair. Records for water year 2017 turbidity are rated fair. Records for water year 2018 turbidity are rated fair except for period Nov 10 to Jan 8, Mar 9 to 12, Jul 27 to Aug 1, Aug 23 to 28, Sept 1 to 6, and 10 to11, which are poor. Beginning in water year 2019, water quality records are not rated as "excellent", "good", "fair", or "poor".
Explanations of sample characteristics are available from the USGS NWISWeb Help System pages: http://waterdata.usgs.gov/nwis/help