USGS 02236125 ST. JOHNS RIVER AT ASTOR, FL

PROVISIONAL DATA SUBJECT TO REVISION

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This gage is monitored in cooperation with the St. Johns River Water Management District.

Link to the St. Johns River Water Management District.
Data are tidally affected -- Astronomical tides cause significant cycles of approximately 24.84 hours at this site. Because a different portion of the 24.84-hour tidal cycle is averaged in successive daily (24-hour) computations, a systematic secondary oscillation, unrelated to basin hydrology and having a period of about two weeks may be apparent in daily data.

REMARKS.--Computed discharge at this station may differ from individual measurements because of changes in tidal influence, wind, or other factors.

Available Parameters Available Period
  
2007-12-13  2016-09-30
1995-10-01  2025-07-07
2007-10-01  2025-07-07
2007-12-13  2016-09-30
2008-07-11  2016-09-30
2010-10-01  2025-07-07
2008-07-11  2015-09-30
2007-10-01  2025-07-05
2025-03-09  2025-07-07







 (7)
 
  -- or --

 

 
Summary of all available data for this site
Instantaneous-data availability statement

Temperature, water, degrees Celsius
 
-- Data temporarily unavailable for the time period specified --

Discharge, cubic feet per second
Most recent instantaneous value: 524 07-07-2025   08:30 EDT
Graph of Discharge, cubic feet per second

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Daily discharge, cubic feet per second -- statistics for Jul 7 based on 30 water years of record more
Min
(2000)		 Most Recent
Instantaneous
Value Jul 7		 25th
percen-
tile		 Mean Median 75th
percen-
tile		 Max
(2018)
408 524 1620 2990 3200 3960 8460

Gage height, feet
Most recent instantaneous value: 1.15 07-07-2025   08:30 EDT
Graph of Gage height, feet

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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius
 
-- Data temporarily unavailable for the time period specified --

Dissolved oxygen, water, unfiltered, milligrams per liter
 
-- Data temporarily unavailable for the time period specified --

Stream water level elevation above NAVD 1988, in feet
Most recent instantaneous value: 0.04 07-07-2025   08:30 EDT
Graph of Stream water level elevation above NAVD 1988, in feet

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Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)
 
-- Data temporarily unavailable for the time period specified --

Discharge, tidally filtered, cubic feet per second
Most recent instantaneous value: -193 07-05-2025   21:00 EDT
Graph of Discharge, tidally filtered, cubic feet per second

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Mean water velocity for discharge computation, feet per second
Most recent instantaneous value: 0.06 07-07-2025   08:30 EDT
Graph of Mean water velocity for discharge computation, feet per second

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