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Available data

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Continuous data

10 data types available - data from 1990-10-01 to 2026-07-31

Daily data

4 data types available - data from 1928-08-01 to 2026-07-29

Field measurements

2 data types available - data from 1979-03-08 to 2026-07-13

Discrete sample data

868 Observed properties (data types) available - with data from 1952-10-10 to 2026-07-13

1271 Sampling activities

Statistical tables for select daily data types

4 data types available - data from 1928-08-01 to 2026-07-29

Important information about this monitoring location

The elevation of this gage is 27.75 ft above NAVD of 1988. To obtain stream water surface elevation values in NAVD88, add 27.75 feet to gage height values.

Location details and information

Available location images

Connecticut River at Thompsonville

Connecticut River at Thompsonville, CT

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Operated in cooperation with:

Connecticut Department of Energy and Environmental Protection

USGS - Cooperative Matching Funds

USGS - Federal Priority Streamgages

USGS - National Water Quality Network

Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	01184000	n/a
Location name	CONNECTICUT RIVER AT THOMPSONVILLE, CT	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	41.987204616172	n/a
Decimal longitude (WGS84)	-72.6053482565335	n/a
Latitude-longitude method	Interpolated from map	M
Latitude-longitude accuracy	Accurate to + or - 1 sec.	S
District	Connecticut	09
State	Connecticut	09
County	Capitol Planning Region	110
Country	United States of America	n/a
Altitude of gage/land surface	27.75 feet	n/a
Method altitude determined	Level or other surveyed method.	L
Altitude accuracy	0.2 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	Outlet Connecticut River	01080205
Drainage basin		n/a
Date of first construction		n/a
Drainage area	9660 square miles	n/a
Contributing drainage area	9660 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

Monitoring location Connecticut River at Thompsonville, CT - USGS-01184000