USGS Water-Year Summary for Site 411402080492400

Click to hide Water-Year Summary instructions and information

Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
Not all sites have reports available for every water year.

	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.)

Select a water year

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

Print this page

USGS Water-Year Summary 2024

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: 27.2°C, Aug. 28, 2021; minimum: -0.18°C, January 15-16, 2024.

SPECIFIC CONDUCTANCE: Maximum: 734 microsiemens, Feb. 25, 2021; minimum: 129 microsiemens, June 17, 2019.

DISSOLVED OXYGEN: Maximum: 14.8 mg/L, Dec. 20, 2019; minimum: 6.6 mg/L, Aug. 13, 2021.

pH: Maximum: 8.45 units, June 10, 2023; minimum: 6.37 units, Oct. 10, 2021