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Scheduled Maintenance Notice
USGS will be performing maintenance on the time series data processing system beginning at 09:00 EDT on September 10, 2026. During this period, delivery of the latest time series data will be delayed. The maintenance is expected to finish within 2 hours, after which all backlogged time series data will be processed and delivered to WDFN web portals and APIs.

Measurements of water temperature are collected seasonally (May 1 through October 31).

Available data

Select data types to graph from categories based on the way the data were collected.

4 data types available - data from 2010-04-16 to 2026-09-10

5 data types available - data from 2010-04-16 to 2026-09-09

2 data types available - data from 2016-08-05 to 2026-08-31

0 observed properties (data types) available

2 data types available - with data from 2011-08-29 to 2025-05-12

5 data types available - data from 2010-04-16 to 2026-09-09

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Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	01382210	n/a
Location name	Pequannock River at Oak Ridge NJ	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	41.0397222222222	n/a
Decimal longitude (WGS84)	-74.5016666666667	n/a
Latitude-longitude method	Interpolated from MAP.	M
Latitude-longitude accuracy	Accurate to + or - 1 sec.	S
District	New Jersey	34
State	New Jersey	34
County	Morris County	027
Country	United States of America	n/a
Altitude of gage/land surface	783.53 feet	n/a
Method altitude determined	GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System	X
Altitude accuracy	0.05 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	Hackensack-Passaic	02030103
Drainage basin		n/a
Date of first construction		n/a
Drainage area	27.4 square miles	n/a
Contributing drainage area		n/a
Time zone abbreviation	EST	n/a
Site honors Daylight Saving Time	Y	n/a
National aquifer		n/a
Local aquifer		n/a
Local aquifer type		n/a
Well depth		n/a
Hole depth		n/a
Source of depth data		n/a