Available data

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

2 data types available - data from 1990-10-01 to 2026-08-21

3 data types available - data from 1923-06-01 to 2026-08-19

2 data types available - data from 1938-09-23 to 2026-06-24

523 Observed properties (data types) available - with data from 1953-10-19 to 2024-09-05

331 Sampling activities

2 data types available - with data from 1852-04-23 to 2020-12-27

3 data types available - data from 1923-06-01 to 2026-08-19

Zoom out to see link to My Favorites

Operated in cooperation with:

Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	01100000	n/a
Location name	MERRIMACK RIVER BL CONCORD RIVER AT LOWELL, MA	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	42.6459246445383	n/a
Decimal longitude (WGS84)	-71.2983936517217	n/a
Latitude-longitude method	Interpolated from map	M
Latitude-longitude accuracy	Accurate to + or - 1 sec.	S
District	New Hampshire	33
State	Massachusetts	25
County	Middlesex County	017
Country	United States of America	n/a
Altitude of gage/land surface	4.37 feet	n/a
Method altitude determined	Level or other surveyed method.	L
Altitude accuracy	0.1 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	Merrimack River	01070006
Drainage basin		n/a
Date of first construction		n/a
Drainage area	4635 square miles	n/a
Contributing drainage area	4421 square miles	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