USGS Water-Year Summary for Site 04200500

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	Available Parameters
	00010 Temperature, water(Min.,Mean,Max.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Mean,Min.)
	00400 pH(Max.,Min.,Med.)
	63680 Turbidity, Form Neph(Min.,Mean,Max.)
	63680 Turbidity, Form Neph(Min.,Mean,Max.) [(2)]

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

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USGS Water-Year Summary 2024

04200500 Black River at Elyria OH

LOCATION - Lat 41°22'49", long 82°06'17" referenced to North American Datum of 1927, Lorain County, OH, Hydrologic Unit 04110001, on left bank in Cascade Park at Elyria, 0.8 mi downstream from confluence of East and West Branches.

DRAINAGE AREA - 396 mi².

REVISIONS HISTORY - WSP 1912: Drainage area. See also PERIOD OF RECORD.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1944 to current year. Records for May 1903 to July 1906 (published as "near Elyria") in WSP 97, 129, and 205, are unreliable and should not be used.

GAGE - Water-stage recorder and crest stage gages. Datum of gage is 620.09 ft (NAVD 1988). Prior to October 2013, datum of gage was 620.83 ft (NGVD of 1929).

REMARKS -

Records good for 2014, except for estimated records, which are poor. Oct. 1, 2014 to Dec. 2, 2014: records fair. Dec. 2, 2014 to Mar. 18, 2015: records fair, except for estimated records, which are poor. Mar. 18, 2015 to Dec. 15, 2015: records fair. Dec. 15, 2015 to Apr. 5, 2016: discharge records fair except for estimated daily discharges, which are poor. Apr. 6, 2016 to Jul. 26, 2016: discharge records good. Jul. 27, 2016 to Sept. 12, 2016: discharge records fair except for estimated daily discharges, which are poor. Sept. 13, 2016 to Nov. 29, 2016: discharge records fair. Nov. 30, 2016 to Jan. 31, 2017: discharge records fair except for estimated daily discharges, which are poor. Feb. 1, 2017 to Oct. 31, 2017: discharge records good. Nov. 1, 2017 to May 18, 2018: discharge records fair except for estimated daily discharges, which are poor. May 19, 2018 to Dec. 18, 2018: discharge records good except for estimated daily discharges, which are poor.

Some regulation at low flow for industrial use.

Water-quality and sediment sample data are available on NWISWEB (http://nwis.usgs.gov).

WATER QUALITY: Oct. 1, 2013 to Jan. 21, 2015: Water temperature records good. Specific conductance records good except Dec 19, 2013 to Jan. 9, 2014 and July 18, 2014 to Sep. 23, 2014, which are fair, and Apr. 30, 2014 to May 15, 2014, which are poor. pH records are good. Dissolved oxygen records are good except Aug. 8, 2014 to Sep. 3, 2014, and Sep. 23, 2014 to Oct. 17, 2014, which are fair. Turbidity records are rated fair except Nov. 5, 2013 to Jan. 9, 2014, which are poor.

Jan. 22, 2015 to Nov. 30, 2015: Water temperature records good. Specific conductance records good except July 8-30, 2015, which are fair, and Jan. 21, 2015 to Feb. 11, 2015, which are poor. pH records are good. Dissolved oxygen records are good except Mar. 26, 2015 to May 26, 2015 and Aug. 19, 2015 to Sept. 8, 2015, which are fair. Turbidity records are rated fair except Mar. 26, 2015 to June 16, 2015 and July 29,2015 to Nov. 30, 2015, which are poor.

Dec. 1, 2015 to Oct. 3, 2016: Water temperature records good. Specific conductance records good, except June 2, 2016 to Aug. 1, 2016, which are fair. pH records are good. Dissolved oxygen records good, except Dec. 1, 2015 to Jan. 15, 2016 and July 20, 2016 to Aug. 5, 2016, which are fair. Turbidity records good except Mar. 2, 2016 to May 2, 2016, and Aug. 2, 2016 to Oct. 3, 2016, which are fair, and Jan. 15, 2016 to Feb. 1, 2016, and May 3, 2016 to Aug. 1, 2016, which are poor.

Oct. 4, 2016 to Dec. 5, 2017: Water temperature records good. Specific conductance records good, except June 16, 2017 to July 5, 2017, which are fair, and Nov. 13, 2017 to Dec. 5, 2017, which are poor. pH records good, except Jan. 3, 2017 to Apr. 3, 2017, which are fair. Dissolved oxygen records good, Apr. 3, 2017 to May 5, 2017, which are fair. Turbidity records good, except Oct. 4, 2017 to Jan. 3, 2017 and Nov. 30, 2017 to Dec. 5, 2017, which are fair.

Dec. 6, 2017 to Nov. 7, 2018: Water temperature records good. Specific conductance records good, except Jan. 2 to Feb. 7, 2018, Apr. 6 to May 7, 2018, and Oct. 8 to Nov. 7, 2018, which are fair. pH records good, except Apr. 6 to Sept. 25, 2018, which are fair, and Sept. 26 to 28, 2018 and Oct. 10 to Nov. 7, 2018, which are poor. Dissolved oxygen records good. Turbidity records good, except May 7, 2018 to June 6, 2018, which are fair, and July 11 to Nov. 7, 2018, which are poor.

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 - June 2011 to current year.

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: June 2011 to current year. pH: June 2011 to current year. WATER TEMPERATURE: June 2011 to current year. DISSOLVED OXYGEN: June 2011 to current year. TURBIDITY (YSI, 6136): June 2011 to Aug. 2021. TURBIDITY (YSI, EXO): Aug. 2021 to current year.

INSTRUMENTATION - Water-quality monitor. Electronic data logger set for 1-hour interval.

EXTREMES FOR PERIOD OF RECORD -

WATER TEMPERATURE: Maximum: 31.6 degrees Celsius, July 17, 2012. Minimum: -0.1 degrees Celsius, January 6, 2014 and and Mar. 5, 2019. SPECIFIC CONDUCTANCE: Maximum: 1,460 microsiemens, February 24, 2021. Minimum: 127 microsiemens, Mar. 30, 2020. DISSOLVED OXYGEN: Maximum: 17.2 mg/L, February 19, 2022. Minimum: 4.2 mg/L, July 18, 2012. pH: Maximum: 9.1 units, August 5-6 and 24-26, 2011, and August 3-4, 2012, and August 19-20, 2013. Minimum: 7.1 units, Aug. 24-25, 2023. TURBIDITY (YSI 6136 sensor): Maximum: >1000 FNUs, March 16, 2012 and June 24, 2014. Minimum: 1.3 FNUs, February 28, 2015. TURBIDITY (YSI EXO): Maximum: 659 FNUs, June 15, 2022. Minimum: 2.0 FNUs, Sept. 20, 2021.