USGS Water-Year Summary for Site 01643580

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	Available Parameters
	00010 Temperature, water(Max.,Mean,Min.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Mean,Min.)
	00300 Dissolved oxygen(Max.,Mean,Min.)
	00400 pH(Max.,Med.,Min.)
	63680 Turbidity, Form Neph(Max.,Mean,Min.)

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Water year 2024: 2023-10-01 to 2024-09-30

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USGS Water-Year Summary 2024

01643580 MONOCACY RIVER NEAR DICKERSON, MD

LOCATION - Lat 39°15'48.23", long 77°26'08.67" referenced to North American Datum of 1983, Frederick County, MD, Hydrologic Unit 02070009,

CQW: Lat 39°24'47.50", long 77°44'02.32" referenced to North American Datum of 1983, Frederick County, MD, Hydrologic Unit 02070009

DRAINAGE AREA - 961 mi².

Based on automated delineation from StreamStats.

From 1975-1979 at the current water quality location, the drainage area was 968 sq. miles.

SURFACE-WATER RECORDS

PERIOD OF RECORD -

From 1975-1979, miscellaneous measurements made at a location 1.8 miles downstream from the current surface water site at the location of the current water quality site.

June 2023 to current year.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 198.05 ft above NAVD88.

REMARKS - Water Year 2023-2024: Records poor, including those for estimated discharges.

WATER-QUALITY RECORDS

PERIOD OF RECORD - June of 2023 to current year.

INSTRUMENTATION - YSI EXO2 multiparameter sonde.

REMARKS - Missing record due to periodic instrument malfunction or times when the sensor is being serviced. Occasional localized spikes in water quality data can be caused from boating, fishing, swimming, and other recreational activities, as well as high winds. These localized spikes are believed to be real, though they may not be representative of the entire river. Due to the width of the river at higher stages during rain events, the continuous water quality data may not be representative of the entire river during those periods. At base flow the sonde better represents the entire channel because the river is channelized down to about 60 feet wide at the gage.

EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum, 32.9°C, July 28, 2023; Minimum, -0.1°C, several days during 2024 Water Year. SPECIFIC CONDUCTANCE: Maximum, 617 microsiemens/cm, September 08, 2023; Minimum, 115 microsiemens/cm, January 11, 2024. DISSOLVED OXYGEN: Maximum, 18.4 mg/L, November 16, 2023; Minimum, 4.3 mg/L, July 08, 2023. PH: Maximum, 9.1 standard units, April 26, 2024; Minimum, 7.2 standard units, December 19, 2023. TURBIDITY: Maximum, 533 FNU, December 18, 2023; Minimum, 0.6 FNU, first occurring on November 20, 2023.