USGS Water-Year Summary for Site 01458500

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00065 Gage height(Max.,Min.)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)
	00301 Diss oxygen,%saturtn(Max.,Min.,Mean)
	00400 pH(Max.,Min.,Med.)
	63680 Turbidity, Form Neph(Max.,Min.,Mean)
	99133 NO3+NO2,water,insitu(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

01458500 DELAWARE RIVER AT FRENCHTOWN, NJ

LOCATION - Lat 40°31'34", long 75°03'54" referenced to North American Datum of 1983, Frenchtown Borough, Hunterdon County, NJ, Hydrologic Unit 02040105, on upstream side of Uhlerstown-Frenchtown bridge, about 200 ft west of left back in Frenchtown, 900 ft upstream of mouth of Nishisakawick Creek, 0.5 mi southeast of Jugtown, PA, and 3.0 miles west of Baptistown.

DRAINAGE AREA - 6,420 mi².

REVISIONS HISTORY - WDR US-2009: 2008(M).

SURFACE-WATER RECORDS

PERIOD OF RECORD - Annual maximum gage, water years 1936-1956, 2005-2006, Continuous-record gage-height station, water years 2008 to current year.

GAGE - Water-stage recorder with telemetry. Datum of gage is 99.04 ft above NAVD of 1988.

REMARKS - Annual peak data can be obtained by selecting Peak streamflow from the 'Available data for this site' drop-down menu above or by using this link.

EXTREMES OUTSIDE PERIOD OF RECORD - The flood of Oct 10, 1903 reached a gage height of 24.4 ft.

EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 27.79 ft, Aug 20, 1955.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

DISCRETE DATA: Water years 1976 to 1982.

CONTINUOUS DATA: Water temperature, specific conductance, pH, dissolved oxygen mg/L, dissolved oxygen percent saturation, and turbidity, Sep 2014 to current year. Nitrate plus Nitrite as N, Mar 2023 to current year.

REMARKS -

The accuracy of continuous water-quality data can be found here.

EXTREMES FOR PERIOD OF DAILY RECORD -

Maximum water temperature, 30.7 deg C on Jul 17, 2024; minimum water temperature, -0.2°C on Jan 30, 2021.

Maximum specific conductance, 493 uS/cm on Feb 9, 2018; minimum specific conductance, 57 uS/cm on Jul 18, 2019.

Maximum dissolved oxygen, 18.6 mg/L on Mar 9, 2019; minimum dissolved oxygen, 5.6 mg/L on June 23, 2024.

Maximum dissolved oxygen, percent of saturation, 200% on Jun 18, 2018; Minimum dissolved oxygen, percent of saturation, 69%, many days.

Maximum pH, 9.4 standard units, many days; minimum pH, 6.7 standard units on Dec 26, 2020.

Maximum turbidity, 1010 FNU on Jul 18, 2019; minimum turbidity, <0.5 FNU, many days.

Maximum Nitrate + Nitrite as N, 19.8 mg/L as N, on Jul 15, 2023; minimum Nitrate + Nitrite as N, <.01 mg/L as N, many days.