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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 2019-06-26 2023-10-31
Information Water-quality 2019-06-26 2024-03-04
Inorganics, Major, Non-metals Unit Values, Water-quality 2019-04-17 2024-11-08
Nutrient Unit Values, Water-quality 2019-04-17 2024-11-08
Organics, other Water-quality 2019-06-26 2023-11-08
Physical Daily Values, Unit Values, Water-quality 2001-10-01 2024-11-08
Sediment Water-quality 2023-07-14 2023-07-14
n/a Peak Measurements 2008-12-12 2011-08-28
n/a USGS Annual Water Data Reports Site 2006-01-01 2023-01-01
Water Data for the Nation inventory

Monitoring location 01194796 is associated with an Estuary in New London County, Connecticut. Current conditions of Chlorophyll relative fluorescence (fChl), Dissolved organic matter fluorescence (fDOM), Dissolved oxygen, and more are available. Water data back to 2001 are available online.

The elevation of this gage is -1.01 ft above NAVD of 1988. To obtain stream water surface elevation values in NAVD88, add -1.01 feet to gage height values.
Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
01194796 n/a
Site name
CONNECTICUT RIVER AT OLD LYME, CT n/a
Site type
Estuary
ES
DMS latitude 411845 n/a
DMS longitude 0722047 n/a
Decimal latitude 41.31248747 n/a
Decimal longitude -72.3459005 n/a
Latitude-longitude method
Interpolated from MAP. M
Latitude-longitude accuracy
Accurate to + or - 1 sec. S
Latitude-longitude datum
North American Datum of 1927 NAD27
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 OLD LYME n/a
Scale of location map 24000 n/a
Altitude of Gage/land surface -1.01 feet n/a
Method altitude determined Level or other surveyed method. L
Altitude accuracy .01 feet n/a
Altitude datum
North American Vertical Datum of 1988 NAVD88
Subbasin hydrologic unit
Lower Connecticut 01080205
Drainage basin
n/a
Topographic setting
Flood plain
G
Flags for instruments at site NNNNYNNYNYNNNNNNNNNNNNNNNNNNNN n/a
Date of first construction
n/a
Date site established or inventoried 19980717 n/a
Drainage area
11224 square miles 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 440900100 n/a