USGS Water-Year Summary for Site 02234610

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	Available Parameters
	00010 Temperature, water(Min.,Mean,Max.)
	00095 Specific cond at 25C(Min.,Max.,Mean)
	00300 Dissolved oxygen(Mean,Max.,Min.)
	00400 pH(Max.,Min.,Med.)
	99133 NO3+NO2,water,insitu(Min.,Mean,Max.)

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

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USGS Water-Year Summary 2024

02234610 ROCK SPRINGS NEAR APOPKA, FL

LOCATION - Lat 28°45'27.25", long 81°29'48.61" referenced to North American Datum of 1983, in sec.10, T.20 S., R.28 E., Orange County, FL, Hydrologic Unit 03080101, on left bank, on wooden walkway, 1100 ft downstream of head of springs and 5.7 mi north of Apopka, FL.

DRAINAGE AREA - Indeterminate.

SURFACE-WATER RECORDS

PERIOD OF RECORD - Water Years 1931-1933, 1935-1936, 1945-1946,1956, 1960-1962, 1965-1967, 1969-1998 (periodic discharge measurements only); October 1998 to September 2002; June 2003 to September 2003, July 2006 to April 2010 (periodic discharge measurements only).

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: July 2021 to current year.

WATER TEMPERATURE: July 2021 to current year.

DISSOLVED OXYGEN: July 2021 to current year.

pH: July 2021 to current year.

NITRATE: July 2021 to current year.

COOPERATION - This gage monitored in cooperation with the Florida Department of Environmental Protection.

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. From July 2021, water temperature, specific conductance and dissolved oxygen published as instantaneous maximum and minimum and daily mean; pH published as instantaneous maximum and minimum and daily median.

EXTREMES FOR PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: Maximum, 315 µS/cm @ 25 °C, July 17, 2022; minimum, 243 µS/cm @ 25 °C, May 22, 2023.

WATER TEMPERATURE: Maximum, 25.0 °C, July 24, 30, 2022; minimum, 23.1 °C, Dec. 24, 25, 2022.

DISSOLVED OXYGEN: Maximum, 6.6 mg/L, Dec. 14, 2018; minimum, 1.2 mg/L, Aug.26, 2022.

pH: Maximum, 8.0 std. units, several days; minimum, 7.4 std. units, many days.

NITRATE: Maximum, 1.42 mg/L, Apr. 8, 9, 16, 2023; minimum, 1.01 mg/L, Aug. 26, 2022.