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Important for you to know:

  • New to WDFN: see current water conditions throughout the state using the new State Pages. Filter by continuous data type and age of data, view latest values, and link to graphing options to explore the data further. To learn more, read our announcement on the Water Data for the Nation blog.
Important Legacy real-time page

USGS Parameter Group Data Types Start Date End Date
Biological Water-quality 2020-06-17 2023-09-28
Information Water-quality 2020-06-17 2024-02-22
Inorganics, Major, Metals Water-quality 1963-09-24 1963-09-24
Inorganics, Major, Non-metals Unit Values, Water-quality 1963-09-24 2024-11-18
Inorganics, Minor, metals Water-quality 1963-09-24 1963-09-24
Nutrient Water-quality 2020-06-17 2024-01-19
Organics, other Water-quality 2020-06-17 2023-11-08
Physical Unit Values, Water-quality 1963-09-24 2024-11-18
Water Data for the Nation inventory

Monitoring location 01127768 is associated with an Estuary in New London County, Connecticut. Current conditions of Dissolved oxygen, Salinity, Specific conductance, and more are available. Water data back to 1963 are available online.

Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
01127768 n/a
Site name
THAMES R AT GROTON, CT. n/a
Site type
Estuary
ES
DMS latitude 412040 n/a
DMS longitude 0720519 n/a
Decimal latitude 41.34444444 n/a
Decimal longitude -72.0886111 n/a
Latitude-longitude method
Interpolated from MAP. M
Latitude-longitude accuracy
Unknown or unspecified. U
Latitude-longitude datum
North American Datum of 1983 NAD83
Decimal Latitude-longitude datum North American Datum of 1983 NAD83
District
Connecticut 09
State
Connecticut 09
County
New London County 011
Country US n/a
Land net location description n/a
Name of location map NEW LONDON, CT n/a
Scale of location map 24000 n/a
Altitude of Gage/land surface 0 feet n/a
Method altitude determined Interpolated from Digital Elevation Model N
Altitude accuracy 4.3 feet n/a
Altitude datum
North American Vertical Datum of 1988 NAVD88
Subbasin hydrologic unit
Long Island Sound 02030203
Drainage basin
n/a
Topographic setting
Stream channel
C
Flags for instruments at site YNNNNNNNNNNNNNNNNNNNNNNNNNNNNN n/a
Date of first construction
n/a
Date site established or inventoried n/a
Drainage area
n/a
Contributing drainage area n/a
Time Zone abbreviation EST n/a
Site honors Daylight Saving Time
Y n/a
Data reliability
n/a
Data-other GW files NNNNNNNN 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
Project number n/a