USGS Water-Year Summary for Site 11273400

Click to hide Water-Year Summary instructions and information

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.

	Available Parameters
	00010 Temperature, water(Mean,Max.,Min.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Mean,Max.,Min.)
	00300 Dissolved oxygen(Mean,Max.,Min.)
	00400 pH(Max.,Min.,Med.)
	32315 Relative fChl, water, in situ(Min.,Med.,Max.)
	63680 Turbidity, Form Neph(Med.,Min.,Max.) [TS087: YSI 6136]
	63680 Turbidity, Form Neph(Min.,Max.,Med.) [TS213: YSI EXO]

Select a water year

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

Print this page

USGS Water-Year Summary 2024

11273400 San Joaquin River above Merced River, near Newman, CA

LOCATION - Lat 37°20'50.2", long 120°58'30.5" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 sec.03, T.7 S., R.9 E., Stanislaus County, CA, Hydrologic Unit 18040001, on left bank, 1,000 ft upstream from the Merced River, 1,500 ft upstream from bridge on Hills Ferry Road/Kelley Road, and 3.4 mi northeast of Newman.

DRAINAGE AREA - 7,949 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - August 2009 to current year (low-flow station only).

GAGE - Water-stage recorder. Datum of gage is 2.55 ft above NAVD of 1988.

REMARKS - No records computed above 2,500 ft³/s. Natural flow of stream affected by storage reservoirs, ground-water withdrawals, diversions for irrigation, and imported water. Low flows consist mainly of return water from irrigated areas.

EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 66.34 ft, Feb. 13, 2017, discharge unknown; minimum daily, 12 ft³/s, Oct. 3 2022.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

DISCRETE WATER-QUALITY DATA:
CHEMICAL DATA: Water years 2014-2017.

CONTINUOUS WATER-QUALITY DATA:
DISSOLVED OXYGEN: Water years October 2009 to current year. (water years 2009-2023, daily).
pH: Water years April 2012 to current year. (water years 2012-2023, daily).
SPECIFIC CONDUCTANCE: Water years August 2009 to current year. (water years 2009-2023, daily).
WATER TEMPERATURE: Water years August 2009 to current year. (water years 2009-2023, daily).
TURBIDITY: Water years April 2012 to current year. (water years 2012-2023, daily).
CHLOROPHYLL: Water years April 2012 to current year. (water years 2012-2023, daily).

INSTRUMENTATION - Water-quality monitor since August 2009.

REMARKS - Water-quality record may not represent total flow during times of backwater from the Merced River.

EXTREMES FOR PERIOD OF DAILY RECORD - DISSOLVED OXYGEN: Maximum recorded, 21.0 mg/L, July 13, 2013; minimum recorded, 1.2 mg/L, June 6, 2019. pH: Maximum recorded, 9.0 standard units, several days in July 2013, June 28, 29, 2014; minimum recorded, 6.4 standard units, June 25, 2017. SPECIFIC CONDUCTANCE: Maximum recorded, 4,890 microsiemens, June 21, 2015; minimum recorded, 79 microsiemens, June 27, 2017. WATER TEMPERATURE: Maximum recorded, 34.4°C, June 26,2015; minimum recorded, 4.6°C, Dec. 10, 2014. TURBIDITY: Maximum recorded, 488 FNU, March 25, 2018; minimum recorded, 1.1 FNU, Dec 17, 18 2015. CHLOROPHYLL: Maximum recorded, 99.7 ug/L, May 12, 2016; minimum recorded, 4.1 ug/L, Sept. 27, 2014. CHLOROPHYLL RFU: Maximum recorded, 7.9 RFU, Sept. 5, 2017; minimum recorded, 0.6 Jan. 19, 2017