USGS Water-Year Summary for Site 411402080492400

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

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

411402080492400 Mahoning River near State Route 422 at Warren OH

LOCATION - Lat 41°14'02", long 80°49'24" referenced to North American Datum of 1983, Trumbull County, OH, Hydrologic Unit 05030103, on right upstream bank of SR 422/South St SW Bridge, 1000 ft downstream from W Market St Bridge, 0.5 miles upstream from Main Ave SW Bridge in Warren.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 2019 to current year.

COOPERATION - Station established and maintained in cooperation with Corps of Engineers, Pittsburgh District.

REMARKS -

Flow regulated by storage in Milton Reservoir and Berlin Reservoir on the Mahoning River, Michael J. Kirwan Reservoir on West Branch Mahoning River, Mosquito Creek Reservoir on Mosquito Creek, Meander Creek Reservoir on Meander Creek, together with several reservoirs on Squaw Creek. Water is also diverted upstream for various other uses.

Record quality ratings may not be included in the water-year summary for approved records newer than 09/30/2018. Record quality is still being rated internally. For questions about record quality ratings, please send email to gs-w-oh_NWISWeb_Data_Inquiries@usgs.gov.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

WATER TEMPERATURE: May 2019 to present.

SPECIFIC CONDUCTANCE: May 2019 to present.

DISSOLVED OXYGEN: May 2019 to present.

pH: May 2019 to present.

INSTRUMENTATION - Sutron Satlink 3 attached to YSI 6820 V2 Sonde with temperature, specific conductance, dissolved oxygen and pH probes set to a 15-minute recording interval.

EXTREMES FOR PERIOD OF RECORD -

WATER TEMPERATURE: Maximum: 26.0°C, July 18, 2020; minimum: -0.1°C, Dec. 20, 2019 and Jan. 20-21, 2020.

SPECIFIC CONDUCTANCE: Maximum: 531 microsiemens, Jan. 18, 2020; minimum: 129 microsiemens, June 17, 2019.

DISSOLVED OXYGEN: Maximum: 14.8 mg/L, Dec. 20, 2019; minimum: 6.9 mg/L, July 11, 2020.

pH: Maximum: 8.2 units, Mar. 1, 2020; minimum: 6.6 units, Sept. 20, 2020.