USGS Water-Year Summary for Site 02235500

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00065 Gage height(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)
	00400 pH(Med.,Min.,Max.)
	63160 Stream level, NAVD88(Mean)
	99133 NO3+NO2,water,insitu(Mean,Max.,Min.)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

02235500 BLUE SPRINGS NEAR ORANGE CITY, FL

LOCATION - Lat 28°56'38", long 81°20'24" referenced to North American Datum of 1927, in NE 1/4 sec.08, T.18 S., R.30 E., Volusia County, FL, Hydrologic Unit 03080101, on right bank of Blue Springs Run, 850 ft upstream from St. Johns River, 1300 ft downstream from head of springs, and 2.5 mi west of Orange City.

DRAINAGE AREA - Indeterminate.

REVISIONS HISTORY - WDR-US-06-1A: Period of record. Records for November 1998 to March 2001, published in WDR FL-99-1A through WDR FL-01-1A, are unreliable and should not be used.

SURFACE-WATER RECORDS

PERIOD OF RECORD - March 1932 to October 1998 (discharge measurements only), November 1998 to November 2001 (gage height and discharge measurements only), December 2001 to current year.

GAGE - Water-stage recorder, acoustic velocity meter, and data-collection platform. Datum of gage is at NGVD of 1929 and 0.94 ft below NAVD of 1988. Prior to Dec. 7, 2001 at site 250 ft downstream at same datum. November 1998 to September 1999 at datum 0.74 ft lower. Prior to November 23, 1998, nonrecording gage at site 30 ft downstream at datum 0.74 ft lower.

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

REMARKS - Discharge affected by backwater from St. Johns River.

EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage of 4.65 ft, Nov. 2, 1999 was recorded during period of gage height record only.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1960, 1964-94, 1998 to 2014, 2020-current year.

PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: December 1998 to September 2014, October 2020 to current year.
WATER TEMPERATURE: December 1998 to September 2014, October 2020 to current year.
DISSOLVED OXYGEN: August 2009 to September 2014, October 2020 to current year. 
pH: October 2020 to current year.
NITRATE: October 2020 to current year.

REMARKS - Extremes may have been exceeded during periods of missing record. Specific conductance and temperature were not published from Aug. 27, 2008-Nov. 6, 2008, because the equipment was removed due to flooding. December 1998 to September 2008, published as daily mean; October 2008 to September 2014, published as instantaneous maximum and minimum. Period of record extremes updated to reflect instantaneous maximums and minimums.

EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: Maximum, 2,780 µS/cm @ 25 °C, Aug. 27-29, 2013; minimum, 763 µS/cm @ 25 °C, Nov. 21, 2002.
WATER TEMPERATURE: Maximum, 24.7°C, April 19, 1999; minimum, 21.9 °C, Feb. 5, 2009.
DISSOLVED OXYGEN: Maximum, 3.9 mg/L, Aug. 13, 2010; minimum, 0.1 mg/L, July 15, 2013.
NITRATE: Maximum, 1.38 mg/L, several days; minimum 0.53 mg/L, Oct. 4, 5, 2022.
pH: Maximum, 7.7 units, May 16, 2021; minimum, 7.2 units, many days.