USGS Water-Year Summary for Site 01474500

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

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

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USGS Water-Year Summary 2024

01474500 SCHUYLKILL RIVER AT PHILADELPHIA, PA

LOCATION - Lat 39°58'04", long 75°11'20" referenced to North American Datum of 1927, Philadelphia County, PA, Hydrologic Unit 02040203, on right bank 150 ft upstream from Fairmount Dam, 1,500 ft upstream from bridge on Spring Garden Street in Philadelphia, and 8.7 mi upstream from mouth.

DRAINAGE AREA - 1,893 mi².

REVISIONS HISTORY -

WSP 756: Drainage area. WSP 1302: 1936(M). WSP 1432: 1945. WDR-US-2010: Diversion. See also PERIOD OF RECORD.

Revisions: Discharge for the period of 4/13/2021 to 7/7/2021 was revised on 4/19/2021 due to record reanalysis

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1931 to current year. Records for January 1898 to December 1912, published in WSP 35, 48, 65, 82, 97, 125, 166, 202, 214, 261, 301, and 381 have been found to be unreliable and should not be used.

GAGE - Water-stage recorder, water-quality monitor, Pluvio precipitation gage, crest-stage gage, and concrete control. Datum of gage is 4.54 ft. above North American Vertical Datum 1988. Prior to Nov. 25, 1956, water-stage recorder at site on right bank just upstream from Fairmount Dam at same datum. Nov. 26, 1956, to Oct. 6, 1966, water-stage recorder at site on left bank 40 ft upstream from Fairmount Dam at same datum. Prior to July 19, 2024, the datum of gage was reported as 5.74 ft above National Geodetic Vertical Datum of 1929. Satellite telemetry at station.

COOPERATION - Station established and maintained by the U.S. Geological Survey. Funding for this station is provided by the U.S. Army Corps of Engineers, Philadelphia District, the City of Philadelphia, Water Department and the U.S. Geological Survey.

REMARKS - Flow regulated by Still Creek Reservoir (station 01469200) since February 1933, Blue Marsh Lake (station 01470870) since April 1979, Green Lane Reservoir (station 01472200) since December 1956 and to some extent by Lake Ontelaunee. Daily mean discharges do not include diversion above station by City of Philadelphia for municipal water supply. Records are rated good except those for estimated daily discharges which are poor. Records for the period October 1, 2016 - December 1 2016 are rated fair.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Oct 4, 1869 reached a stage of 17.0 ft, discharge, about 135,000 ft³/s. Flood of Mar 1, 1902 reached a stage of 14.8 ft, discharge, about 98,000 ft³/s.

WATER-QUALITY RECORDS

PERIOD OF RECORD - October 1945 to November 1980. October 2018 to present.

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: October 1963 to November 1980. October 2018 to current year. pH: January 1968 to November 1980. WATER TEMPERATURE: October 1945 to November 1980. October 2018 to current year. DISSOLVED OXYGEN: January 1966 to November 1980.

COOPERATION - Funding for this station is provided by the City of Philadelphia, Water Department and the U.S. Geological Survey.

INSTRUMENTATION - Water-quality monitor January 1966 to November 1980. October 2018 to present.

REMARKS - Water-quality recorder located at Belmont raw-water pumping station on west side of river near Columbia Bridge through November 1980. Recorder located at gage on right bank 150 ft upstream from Fairmount Dam. Interruptions in the record were due to malfunctions of the instrument.

EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum, 972 micrombs June 25, 1965; minimum, 92 miscrombs February 26, 1979. pH: Maximum, 10.1 August 12, 1969; minimum, 5.4 October 20, 1980. WATER TEMPERATURE: Maximum, 32.0 °C August 5, 10, 1980; minimum, 0.0 °C many days during winter months. DISSOLVED OXYGEN: Maximum, 21.6 mg/L June 30, 2021.; minimum, 0.4 mg/L July 24, 1971. TURBIDITY: Maximum 528.6 FNU September 1, 2021; Minimum: 0 FNU July 1, 2020, and many other dates.