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Water-Year Summary for Site 01408000

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

Water year 2025: 2025-10-01 to 2026-09-30
 
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USGS Water-Year Summary 2025
01408000 MANASQUAN RIVER AT SQUANKUM, NJ
LOCATION - Lat 40°09'41", long 74°09'17" referenced to North American Datum of 1983, Howell Township, Monmouth County, NJ, Hydrologic Unit 02040301, on right bank 50 ft upstream from northbound bridge on County Highway 547 (Lakewood Farmingdale Road) in Squankum, and 0.4 mi downstream from Marsh Bog Brook.
DRAINAGE AREA - 44 mi².
REVISIONS HISTORY - WDR NJ-83-1: Drainage area. WDR US-2011: 2010(M).
SURFACE-WATER RECORDS
PERIOD OF RECORD - Continuous-record discharge station, July 1931 to current year. Monthly discharge only for July 1931, published in WSP 1302.
GAGE - Water-stage recorder with telemetry and concrete control. Datum of gage is 17.37 ft above NAVD of 1988. Prior to Aug 13, 1940, water-stage recorder at site 80 ft upstream at same datum.
REMARKS - Records fair, except for estimated discharges, which are poor. Since 1990, 3.18 mi² controlled by Manasquan Reservoir located on Timber Swamp Brook.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 9,100 ft³/s, Aug 28, 2011, gage height, 13.06 ft; minimum discharge, 8.1 ft³/s, Aug 6, 1981.
WATER-QUALITY RECORDS
PERIOD OF RECORD -
DISCRETE DATA: Water years 1959-81, 1991 to current year.
CONTINUOUS DATA:
Dissolved Oxygen, August 1969 to September 1974. pH, July 1969 to September 1974, July to November 2017.
Specific Conductance, July 1969 to September 1974, December 2015 to 2021.
Turbidity, December 2015 to 2021. Water Temperature, July 1969 to September 1974, December 2015 to 2021.
REMARKS - The accuracy of continuous water-quality data can be found here.
EXTREMES FOR PERIOD OF RECORD -
SPECIFIC CONDUCTIVITY: Maximum, 4570 microsiemens/cm, Feb 3, 2021; minimum, 25 microsiemens/cm, Jul 12, 2019.
WATER TEMPERATURE: Maximum, 24.9°C, Jul 26, 2016; minimum, -0.1°C, many days during winters.
TURBIDITY: Maximum, 560 FNU, Aug 21, 2015 and Apr 15, 2019; minimum, 2.1 FNU, Dec 11, 2017.