USGS Water-Year Summary for Site 453004122510301

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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(Max.,Med.,Min.)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

453004122510301 BEAVERTON CREEK AT 170TH AVE, BEAVERTON, OR

LOCATION - Lat 45°30'04", long 122°51'03" referenced to North American Datum of 1927, Washington County, OR, Hydrologic Unit 17090010, and on left bank.

DRAINAGE AREA - 22.7 mi².

Mean basin slope measured in degrees: 4.5 degrees

Mean annual precipitation: 42.2 inches

WATER-QUALITY RECORDS

PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: May 2001 to December 2002 (seasonal records only), April 2003 to current year.

pH: May 2001 to December 2002 (seasonal records only), April 2003 to current year.

WATER TEMPERATURE: May 2001 to December 2002 (seasonal records only), April 2003 to current year.

DISSOLVED OXYGEN: May 2001 to December 2002 (seasonal records only), April 2003 to current year.

TURBIDITY: April 2002 to December 2002 (seasonal records only), April 2003 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. 26, 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, 607 microsiemens Aug. 9, 2018; minimum, 52 microsiemens Nov. 22, 2011.

pH: Maximum, 9.0 units May 13-15, 2023; minimum, 6.3 units Oct. 22, 23, 2014, Sept. 18, 19, 2019.

WATER TEMPERATURE: Maximum, 30.1°C June 28, 2021; minimum, 0.0°C Dec. 22, 2008, Dec. 8, 2013, Dec. 23, 2022.

DISSOLVED OXYGEN: Maximum, 13.7 mg/L Apr. 23, 2006; minimum, 0.4 mg/L Sept. 12, 2020.

TURBIDITY: Maximum, 509 FNU Oct. 31, 2014; minimum, <1 FNU on many days each year.