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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
Physical Daily Values, Unit Values 2016-01-12 2024-11-21
n/a USGS Annual Water Data Reports Site 2016-01-01 2022-01-01
Water Data for the Nation inventory

Monitoring location 301817081393600 is associated with a Stream in Duval County, Florida. Current conditions of Salinity, Specific conductance, and Temperature are available. Water data back to 2016 are available online.

Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
301817081393600 n/a
Site name
ST JOHNS RIVER BL MARCO LK AT JACKSONVILLE, FL n/a
Site type
Stream
ST
DMS latitude 301817.21 n/a
DMS longitude 0813936.36 n/a
Decimal latitude 30.30478056 n/a
Decimal longitude -81.6601 n/a
Latitude-longitude method
Mapping grade GPS unit (handheld accuracy range 12 to 40 ft) G
Latitude-longitude accuracy
Accurate to + or - .5 sec (PLGR/PPS GPS). 5
Latitude-longitude datum
North American Datum of 1983 NAD83
Decimal Latitude-longitude datum North American Datum of 1983 NAD83
District
125 n/a
State
Florida 12
County
Duval County 031
Country US n/a
Land net location description S T2S R27E n/a
Name of location map JACKSONVILLE, FL n/a
Scale of location map 24000 n/a
Altitude of Gage/land surface n/a
Method altitude determined n/a
Altitude accuracy n/a
Altitude datum
n/a
Subbasin hydrologic unit
03080103
Drainage basin
n/a
Topographic setting
n/a
Flags for instruments at site YNNNYNNNNNNNNNNNNNNNNNNNNNNNNN n/a
Date of first construction
20151001 n/a
Date site established or inventoried 20151001 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
Data have been checked by the reporting agency. C
Data-other GW files 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