USGS Water-Year Summary for Site 02301500

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	Available Parameters
	00010 Temperature, water(Max.,Mean,Min.)
	00045 Precipitation(Sum)
	00060 Discharge(Mean)
	00065 Gage height(Mean)
	00095 Specific cond at 25C(Min.,Max.,Mean)
	00300 Dissolved oxygen(Mean,Max.,Min.)
	00400 pH(Max.,Min.,Med.)
	63160 Stream level, NAVD88(Mean)
	63680 Turbidity, Form Neph(Max.,Mean,Min.)

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

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USGS Water-Year Summary 2024

02301500 ALAFIA RIVER AT LITHIA, FL.

LOCATION - Lat 27°52'19", long 82°12'41" referenced to North American Datum of 1927, in NE 1/4 sec.16, T.30 S., R.21 E., Hillsborough County, FL, Hydrologic Unit 03100204, near center of span on upstream side of bridge on State Highway 640, 2.0 mi upstream from Little Fishhawk Creek, 4.3 mi west of Lithia, and 16 mi upstream from mouth.

DRAINAGE AREA - 335 mi².

REVISIONS HISTORY - WSP 782: 1933(M). WSP 1234: Drainage area. WSP 1274: 1933-35, 1939, 1945, 1947-50. WDR-US-2008: Rainfall.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1932 to current year. Monthly discharge only prior to February 1933, published in WSP 1304.

GAGE - Water-stage recorder. Datum of gage is 7.00 ft above National Geodetic Vertical Datum of 1929 and 6.04 ft. above North American Vertical Datum of 1988. Prior to Aug. 8, 1939, nonrecording gage at site 200 ft upstream; Aug. 8, 1939, to Sept. 5, 1963, water-stage recorder at site 60 ft downstream; Sept. 6, 1963, to Oct. 14, 1965, water-stage recorder at site 50 ft downstream. Prior to Oct. 14, 1965, at datum 2.86 ft higher.

COOPERATION - This gage is monitored in cooperation with Southwest Florida Water Management District and Hillsborough County.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - October 2002 to current year.

INSTRUMENTATION - A 6-inch diameter, tipping bucket precipitation gage 15-minute interval, mounted next to the gage structure at approximately 8 ft above ground level.

REMARKS - Collection, computation and publication of precipitation data do not necessarily conform to standards used by the National Weather Service. Records of precipitation prior to October 1, 2002 not published but are available in the files of the Geological Survey.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

Specific Conductance: January 2018 to current year.

Temperature: January 2018 to current year.

Turbidity: January 2018 to current year.

pH: January 2018 to current year.

Dissolved Oxygen: June 2020 to current year.

COOPERATION - This gage is monitored in cooperation with Tampa Bay Water.

INSTRUMENTATION - Water-quality monitor consisting of specific conductance, temperature, turbidity, pH and dissolved oxygen sensors located approximately 8.54 ft above North American Vertical Datum of 1988.

EXTREMES FOR PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: Maximum, 892 microsiemens, July 05, 2020; minimum, 114 microsiemens, June 12, 2021. TEMPERATURE: Maximum, 31.4°C, Aug 13, 2023; minimum, 10.1 °C, Jan. 19, 2018. pH: Maximum, 8.8 std. units, May 13, 26, 31 2022; minimum, 6.5 std. units, Nov 12, 2020, May 27, 2023. TURBIDITY: Maximum, 148 FNU, June 01, 2018; minimum, 0.6 FNU, March 11, 2020, May 13, 2021, April 14-17, 2023, and May 13-19, 2023. DISSOLVED OXYGEN: Maximum, 12.3 mg/l, Feb 15, 2022; minimum, 0.6 mg/l, June 04, 2021.