USGS Water-Year Summary for Site 01104415

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(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

01104415 CAMBRIDGE RESERVOIR, UNNAMED TRIBUTARY 2, NEAR LEXINGTON, MA

LOCATION - Lat 42°26'09", long 71°15'38" referenced to North American Datum of 1927, Middlesex County, MA, Hydrologic Unit 01090001, 250 ft upstream from Lincoln Street, 270 ft upstream from Cambridge Reservoir, and 1.9 mi southwest of Lexington.

DRAINAGE AREA - 0.41 mi².

REVISIONS HISTORY - Annual peak discharges, water years 1998, and 2004-2009.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1997 to September 1998; December 2003 to current year.

GAGE - Data Collection Platform with telephone telemeter. Datum of gage is 174.20 ft above NAVD 1988, estimated from topographic map. Datum of gage previously reported as 175 ft above NGVD 1929, estimated from topographic map.

COOPERATION - Cambridge Water Department.

REMARKS - Records good except those for discharges less than 0.10 cfs and those for estimated daily discharges, which are poor. Lowest daily mean discharge occurred on many days during period of record.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD - October 1997 to September 1998, December 2003, to current year.

INSTRUMENTATION - Specific conductance and water temperature water-quality monitor.

REMARKS -

2017 WATER-YEAR SUMMARY (min/max info): WATER TEMPERATURE: Maximum instantaneous water temperature: 26.4 °C on Jun. 23, 2017; Minimum instantaneous water temperature: 0.0 °C on Feb. 09, 2017 and many other days throughout the winter. SPECIFIC CONDUCTANCE: Maximum instantaneous specific conductance: 12,900 µS/cm on Feb. 16, 2017; Minimum instantaneous specific conductance: 42 µS/cm on Jul. 12, 2017. Records of water temperature are rated excellent. Records of specific conductance are rated as excellent except for the following daily ranges: 2016/12/14 through 2017/02/24; 2017/03/12; 2017/04/03; and 2017/09/08 which are rated good; and 2016/10/23 through 2016/10/25; 2017/04/04 through 2017/04/11; and 2017/07/13 through 2017/07/18 which are rated poor.

2016 WATER-YEAR SUMMARY (min/max info): WATER TEMPERATURE: Maximum instantaneous water temperature: 24.3 °C on Aug. 14, 2016; Minimum instantaneous water temperature: 0.0 °C on Feb. 13, 14, 15, 2016. SPECIFIC CONDUCTANCE: Maximum instantaneous specific conductance: 18,600 µS/cm on Feb. 16, 2016; Minimum instantaneous specific conductance: 119 µS/cm on Nov. 20, 2015. Records of water temperature are rated excellent. Records of specific conductance are rated as excellent except for the following daily ranges: 2015/10/09 to 2015/10/11, 2015/10/25 to 2015/10/27, 2015/10/30 to 2015/11/13, 2016/03/02 to 2016/03/10, 2016/06/21, and 2016/06/28 to 2016/07/03 which are rated good; 2015/10/28 to 2015/10/29, 2015/11/14 to 2015/11/19, 2015/11/21 to 2015/11/26, 2016/03/11 to 2016/03/16, and 2016/08/10 to 2016/08/14 which are rated fair; and 2015/10/01 to 2015/10/08, 2015/11/20, 2015/11/27 to 2016/02/26, and 2016/03/17 to 2016/06/16 which are rated poor.

2015 WATER-YEAR SUMMARY (min/max info): WATER TEMPERATURE: Maximum instantaneous water temperature: 25.6 °C on Sept. 09, 2015; Minimum instantaneous water temperature: 0.0 °C on Jan. 27, 2015 and many other days throughout the winter. SPECIFIC CONDUCTANCE: Maximum instantaneous specific conductance: 17,400 µS/cm on Feb. 22, 2015; Minimum instantaneous specific conductance: 53 µS/cm on Oct. 23, 2014. Records of water temperature are rated excellent. Records of specific conductance are rated as excellent except for the following daily ranges: 2014/10/03 to 2014/10/17, 2014/12/05, 2014/12/11 to 2014/12/16, 2014/12/20 to 2014/12/22, 2014/12/28 to 2015/01/03, 2015/01/09 to 2015/01/24, 2015/01/26 to 2015/02/13, 2015/02/18 to 2015/03/04, 2015/03/07 to 2015/03/09, 2015/03/11, 2015/03/14 to 2015/03/19, 2015/03/25 to 2015/03/27, 2015/04/28 to 2015/06/07,and 2015/06/10 which are rated good; 2014/10/02, 2015/02/14 to 2015/02/17, 2015/06/08 to 2015/06/09, and 2015/06/11 to 2015/07/19 which are rated fair; and 2014/11/01 to 2014/11/02, 2014/11/06 to 2014/11/07, 2014/11/17 to 2014/11/19, 2014/12/01 to 2014/12/04, 2014/12/06 to 2014/12/10, 2014/12/17 to 2014/12/19, 2014/12/23 to 2014/12/27, 2015/01/04 to 2015/01/08, and 2015/07/20 to 2015/09/30 which are rated poor. 2014 WATER-YEAR SUMMARY (min/max info): WATER TEMPERATURE: Maximum instantaneous water temperature: 24.6 °C on Sept. 06, 2014; Minimum instantaneous water temperature: 0.0 °C on Dec. 14, 2013 and many other days throughout the winter. SPECIFIC CONDUCTANCE: Maximum instantaneous specific conductance: 17,800 µS/cm on Feb. 14, 2014; Minimum instantaneous specific conductance: 69 µS/cm on Jul. 16, 2014. Record quality is described in the following publication: Wagner, R.J., Boulger, R.W., Jr., Oblinger, C.J., and Smith, B.A., 2006, Guidelines and standard procedures for continuous water-quality monitors—Station operation, record computation, and data reporting: U.S. Geological Survey Techniques and Methods 1–D3, 51 p. + 8 attachments; accessed April 10, 2006, at http://pubs.water.usgs.gov/tm1d3

EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum recorded, 26,800 uS/cm, Mar. 22, 1998; minimum, 42 uS/cm, June 13, 1998. WATER TEMPERATURE: Maximum recorded, 26.6 °C, July 12, 2010 (rated poor); minimum, -1.0 °C (rated poor), Jan. 28, 2009.