USGS Water-Year Summary for Site 0165389205

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	Available Parameters
	00010 Temperature, water(Min.,Mean,Med.,Max.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean,Med.)
	00300 Dissolved oxygen(Max.,Min.,Mean,Med.)
	00400 pH(Max.,Min.,Med.)
	63680 Turbidity, Form Neph(Med.,Max.,Min.,Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

0165389205 ACCOTINK CREEK NEAR RANGER ROAD AT FAIRFAX, VA

LOCATION - Lat 38°51'58.47", long 77°17'10.98" referenced to North American Datum of 1983, Fairfax City, VA, Hydrologic Unit 02070010, on left bank, 800 ft upstream from US Highway 50/29.

DRAINAGE AREA - 3.99 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 2011 to January 2015 (discontinued).

GAGE - Water-stage recorder. Datum of gage is 295.61 ft NAVD of 1988.

REMARKS - Records good except for estimated daily discharges, which are fair, and other periods as noted.

WATER-QUALITY RECORDS

PERIOD OF RECORD - November 2011 to January 2015 (discontinued).

PERIOD OF DAILY RECORD -
DISSOLVED OXYGEN: November 2011 to January 2015.
pH: November 2011 to January 2015.
SPECIFIC CONDUCTANCE: November 2011 to January 2015.
TURBIDITY: November 2011 to January 2015.
WATER TEMPERATURE: November 2011 to January 2015.

INSTRUMENTATION - Water-quality monitor. Electronic data logger with 15-minute recording interval.

REMARKS -
For water year 2014:
DISSOLVED OXYGEN: Records excellent Oct. 19 to Apr. 28, Apr. 30 to May 12, May 14-27, May 30 to July 25, and Aug. 8 to Sept. 28. Records good Oct. 1-2, Apr. 29, and Sept 29-30. Records fair Oct. 3-6 and Oct. 8-16. Records poor Oct. 7, Oct. 17-18, May 12-14, May 28-29, and July 25 to Aug. 8.
pH: Records excellent Oct. 1-11, Oct. 19 to May 31, June 19 to July 16, Sept. 4-23, and Sept. 25-28. Records good Oct. 12-18, June 1-18, and Sept. 24, 29-30. Records poor July 16 to Sept. 4.
SPECIFIC CONDUCTANCE: Records excellent Oct. 1-7, Dec. 6, 8, 9, Dec. 12 to Feb. 26, Feb. 28 to Mar. 7, Apr. 1 to May 6, June 19-25, July 8-16, and Sept. 30. Records good Dec. 7, 10, 11 and Mar. 8-28, May 7-20, and June 26 to July 7. Records fair Mar. 29-31 and May 21-30. Records poor Oct. 7-18, Feb. 27, Apr. 30 to May 1, May 31 to June 18, and July 16 to Sept. 4.
TURBIDITY: Records excellent Oct. 1-7, 18-26, Nov. 16 to Dec. 21, Dec. 26-28, Jan. 1, Jan. 16 to Apr. 8, Apr. 9, May 12, May 14 to June 7, 10-13, June 19 to July 16, and Sept. 4-14. Records good Oct. 27 to Nov. 6, Dec. 22-25, 31, Jan. 2, 4-8, June 8-9, 14-18, and Sept. 15-19, 25-28. Records fair Nov. 7-14, Dec. 29, 30, Jan. 3-9, and Sept. 20-24, 29. Records poor Oct. 7-18, Nov. 15, Jan. 5-7, 10-15, Apr. 8-9, May 12-14, July 16 to Sept. 4, and Sept. 30.
WATER TEMPERATURE: Records excellent.

For water year 2015, through Jan. 9 (station discontinued):
DISSOLVED OXYGEN: Records excellent Oct. 1-21. Records good Oct. 21 to Dec 10. Records fair Dec. 10 to Jan. 9.
pH: Records good Oct. 1 to Jan. 9.
SPECIFIC CONDUCTANCE: Records fair Oct. 1 to Jan 9.
TURBIDITY: Records poor Oct. 1 to Jan 9.
WATER TEMPERATURE: Records excellent.

EXTREMES FOR PERIOD OF DAILY RECORD -
Through Jan. 9, 2015 (station discontinued):
DISSOLVED OXYGEN: Maximum: 16.7 mg/L, Feb. 21, 2012, but may have been higher during periods of missing record; minimum: 3.0 mg/L, July 4, 2012, but may have been lower during periods of missing record.
pH: Maximum: 9.2 standard units, Apr. 17, 2012, but may have been higher during periods of missing record; minimum: 6.1 standard units, Aug. 9, 2013, but may have been lower during periods of missing record.
SPECIFIC CONDUCTANCE: Maximum: 10,600 microsiemens/cm, Dec. 8, 2014, but may have been higher during periods of missing record; minimum: 34 microsiemens/cm, Oct. 2, 2012, Sept. 21, 2013, but may have been lower during periods of missing record.
TURBIDITY: Maximum: 1,620 FNU, June 7, 2013, but may have been higher during periods of missing record; minimum: 0.0 FNU, on several days.
WATER TEMPERATURE: Maximum: 29.5 °C, July 8, Aug. 8 2012, but may have been higher during periods of missing record; minimum: -0.2 °C, Jan. 4, 22, 23, and Feb. 14 2014, but may have been lower during periods of missing record.