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Water-Year Summary for Site 453030122560101

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
00095 Specific cond at 25C(Max.,Min.,Mean)  
00300 Dissolved oxygen(Max.,Min.,Mean)  
00400 pH(Max.,Min.,Med.)  
63680 Turbidity, Form Neph(Med.,Min.,Max.)  

Water year 2018: 2017-10-01 to 2018-09-30
 
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USGS Water-Year Summary 2018
453030122560101 ROCK CREEK AT BROOKWOOD AVENUE, HILLSBORO, OR
LOCATION - Lat 45°30'29.5", long 122°56'00.6" referenced to North American Datum of 1983, Washington County, OR, Hydrologic Unit 17090010,
WATER-QUALITY RECORDS
PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: May 2004 to current year.

pH: May 2004 to current year.

WATER TEMPERATURE: May 2004 to current year.

DISSOLVED OXYGEN: May 2004 to current year.

TURBIDITY: May 2004 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 - TURBIDITY: Data collected using a YSI EXO2 sonde. Manufacturer's stated accuracy is the greater of +/- 2 percent or 0.3 Formazin Nephelometric Units (FNU) for 0-999 FNU, and +/- 5 percent for 1,000-4,000 FNU. Prior to Nov. 24, 2014, data collected using a YSI 6026 turbidity sensor. Manufacturer's 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 -

SPECIFIC CONDUCTANCE: Maximum, 534 microsiemens Aug. 12, 2009; minimum, 60 microsiemens Dec. 7, 2015.

pH: Maximum, 8.2 units May 22, 23, 2004; minimum, 6.4 units Oct. 22, 23, 2017.

WATER TEMPERATURE: Maximum, 27.1°C July 29, 2009; minimum, -0.1°C Dec. 16, 2008, Dec. 7, 2009, Dec. 7, 2013.

DISSOLVED OXYGEN: Maximum, 14.0 mg/L Feb. 6, 2014; minimum, 3.6 mg/L Aug. 29, 2015.

TURBIDITY: Maximum recorded, 491 FNU Nov. 2, 2004; minimum, 1.7 FNU Oct. 22, 2015.