Sudden spikes observed in water-quality parameter readings may be due to water treatment plant maintenance.

Available data

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

10 data types available - data from 1981-10-01 to 2026-08-01

9 data types available - data from 1912-10-01 to 2026-07-31

2 data types available - data from 1936-03-19 to 2026-05-27

1573 Observed properties (data types) available - with data from 1944-10-01 to 2026-06-29

2077 Sampling activities

11 data types available - data from 1912-10-01 to 2026-07-31

Available location images

Delaware River at Trenton

Delaware River at Trenton, NJ

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Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	01463500	n/a
Location name	Delaware River at Trenton NJ	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	40.2216666666667	n/a
Decimal longitude (WGS84)	-74.7780555555556	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	Mercer County	021
Country	United States of America	n/a
Altitude of gage/land surface	-1.08 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	Middle Delaware-Musconetcong	02040105
Drainage basin		n/a
Date of first construction		n/a
Drainage area	6780 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