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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
14158100 WILLAMETTE RIVER AT OWOSSO BRIDGE, AT EUGENE, OR
LOCATION - Lat 44°05'30", long 123°06'58" referenced to North American Datum of 1983, Lane County, OR, Hydrologic Unit 17090003, and on left bank.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD -
WATER TEMPERATURE: November 2010 to current year.
DISSOLVED OXYGEN: September 2014 to current year.
TURBIDITY: November 2010 to current year.
INSTRUMENTATION - Water-quality monitor. Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government.
REMARKS - Prior to October 2011, published as Willamette River at Eugene.
TURBIDITY: Data collected using a YSI EXO2 sonde. Manufacturers stated accuracy is the greater of +/- 2 percent or 0.3 Formazin Nephelometric Units (FNU) except for 1,000-4,000 FNU, which is +/- 5 percent. Prior to Sept. 12, 2014, data collected using a YSI 6136 turbidity sensor. Manufacturers stated accuracy is the greater of +/- 5 percent or 2 FNU. FNU values below 10 are reported to nearest 0.1 FNU. Negative recorded values are reported as 0.0 FNU.
EXTREMES FOR PERIOD OF DAILY RECORD -
WATER TEMPERATURE: Maximum, 23.2°C July 31, 2015, July 28, 2020; minimum, 1.9°C Jan. 7, 2017.
DISSOLVED OXYGEN: Maximum, 14.4 mg/L Feb. 25, 2023; minimum, 7.6 mg/L July 29, 2020.
TURBIDITY: Maximum, 199 FNU Dec. 22, 2014; minimum, <1 FNU on many days.
