USGS Water-Year Summary for Site 01474000

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

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

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USGS Water-Year Summary 2024

01474000 WISSAHICKON CREEK AT MOUTH, PHILADELPHIA, PA

LOCATION - Lat 40°00'55", long 75°12'26" referenced to North American Datum of 1927, Philadelphia County, PA, Hydrologic Unit 02040203, on left bank 100 ft upstream from dam at Ridge Avenue, 750 ft upstream from mouth, and 1,000 ft northwest of Gustine Lake in Philadelphia.

DRAINAGE AREA - 64 mi².

REVISIONS HISTORY - WSP 1302: 1905: WDR PA-89-1: 1988.

SURFACE-WATER RECORDS

PERIOD OF RECORD - June 1897 to September 1903, January 1905 to July 1906, October 1965 to current year. Prior to October 1965, records furnished by Department of Public Works, City of Philadelphia, and published as "near Philadelphia". Records for 1971-74 published in WDR PA-81-1.

GAGE - Water-stage recorder, crest-stage gage, and water-quality monitor. Datum of gage is 25.27 ft above North American Vertical Datum of 1988 (from benchmark). Prior to October 1965, water-stage recorder at about same site and datum. Prior to September 23, 2024, the datum of gage was reported as 26.41 f t above National Geodetic Vertical Datum of 1929. Satellite telemetry at station.

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

REMARKS - Water years 2014-2017 records good except those less than 100 ft³/s, which are fair and those for estimated daily discharges which are poor. Records for water year 2018 are good except for flows less than 100 ft³/s, which are fair. Water year 2019 records are fair and those for estimated discharges, which are poor. Water year 2020 records are good except those less than 100 ft³/s, which are fair and those for estimated discharges, which are poor. Records for water years 2021-2022 records are fair except those greater than 220 ft³/s, which are poor. Records for water year 2023 are fair.

WATER-QUALITY RECORDS

PERIOD OF RECORD - April 2002 to current year.

COOPERATION - Water-quality samples were collected as part of the Pennsylvania Department of Environmental Protection Water-Quality Network (WQN) with cooperation from the Pennsylvania Department of Environmental Protection.

REMARKS - As of October 2013, results from discrete water quality samples collected at this site are available through the U.S. Geological Survey National Water Information System web interface on the "Water Quality for the Nation" webpage. Analyses for pH, water temperature, specific conductance, and dissolved oxygen were performed on site. All other sample analyses were performed at the Pennsylvania Department of Environmental Protection laboratory in Harrisburg, Pa. Occasionally, values for filtered parameters may exceed values for the corresponding unfiltered parameter. These results are within the limits of analytical precision and methods.