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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
301510081383500 ST JOHNS RVR AT CHRSTOPHER PT NR JACKSONVILLE, FL
LOCATION - Lat 30°15'10.40", long 81°38'35.16" referenced to North American Datum of 1983, in T.3 S., R.27 E., Duval County, FL, Hydrologic Unit 03080103, in land grant 42, on wooden dock on right bank, 275 ft southwest of Christopher Point Rd W, 4.5 mi downstream from Buckman Bridge, 5.4 mi south of Jacksonville, and 29 mi upstream from mouth.
DRAINAGE AREA - Indeterminate.
WATER-QUALITY RECORDS
PERIOD OF RECORD -
SPECIFIC CONDUCTANCE: January 2016 to current year.
WATER TEMPERATURE: January 2016 to current year.
SALINITY: January 2016 to current year.
COOPERATION - This gage is monitored in cooperation with the U.S. Army Corps of Engineers.
INSTRUMENTATION - Water-quality monitor and data-collection platform.
REMARKS - Extremes for current year and extremes for period of daily record are based on recorded values and may have been exceeded during periods of no record. January 2016 to current year; water temperature, specific conductance, and salinity published as instantaneous maximum, minimum, and daily mean.
EXTREMES FOR PERIOD OF RECORD -
SPECIFIC CONDUCTANCE: Maximum, 46,000 µS/cm @ 25 °C, Apr. 11, 2023; minimum, 368 µS/cm @ 25 °C, Aug. 2, 2018.
WATER TEMPERATURE: Maximum, 35.4 °C, July 13, 2016; minimum, 7.9°C, Jan. 1, 2018.
SALINITY: Maximum, 30.0 ppth, Apr. 11, 2023; minimum, 0.2 ppth, many days.
