USGS Water-Year Summary for Site 04199500

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

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

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USGS Water-Year Summary 2024

04199500 Vermilion River near Vermilion, OH

LOCATION - Lat 41°22'55", long 82°19'01" referenced to North American Datum of 1927, Lorain County, OH, Hydrologic Unit 04100012, on right downstream abutment of bridge on North Ridge Road, 3.5 mi southeast of Vermilion and 4.5 mi upstream of the mouth at Lake Erie.

DRAINAGE AREA - 262 mi².

REVISIONS HISTORY - WSP 1912: Drainage area. WDR-OH-70-1: 1969. Daily values on Jan. 19-26, 2016 were revised May 12, 2016.

SURFACE-WATER RECORDS

PERIOD OF RECORD - March 1950 to September 1981, November 2000 to current year.

GAGE - Water-stage recorder and crest stage gage. Datum of gage is 594.51 ft (NAVD 1988). Prior to October 2013 datum of gage was 595.14 ft (NGVD 1929). Prior to Aug. 3, 1953, nonrecording gage at site 40 ft upstream at (NGVD 1929).

REMARKS -

Records fair for 2014, except for estimated records, which are poor. Oct. 1, 2014 to Dec. 2, 2014: discharge records fair. Dec. 2, 2014 to Apr. 9, 2015: discharge records fair, except for estimated records, which are poor. Apr. 9, 2015 to Oct. 20, 2015: discharge records fair. Oct. 20, 2015 to Mar. 21, 2016: discharge records good, except for estimated records, which are poor. Mar. 21, 2016 to May 26, 2016: discharge records fair. May 27, 2016 to July 26, 2016: discharge records good. Jul. 27, 2016 to Nov. 30, 2016: discharge records fair. Nov. 30, 2016 to Oct. 15, 2017: discharge records fair except for estimated records, which are poor. Oct. 16, 2017 to Feb. 26, 2018: discharge records poor. Feb. 26, 2018 to June 11, 2018: discharge records fair. June 11, 2018 to Oct. 16, 2018: discharge records good. Water-quality and sediment sample data are available on NWISWEB (http://nwis.usgs.gov).

WATER-QUALITY RECORD: Oct. 1, 2013 to Jan. 4, 2015: Water temperature records good. Specific conductance records good, except Apr. 9, 2014 to May 14, 2014, which are fair. pH records good. Dissolved oxygen records good, except June 11, 2014 - July 1, 2014 and Nov. 10, 2014 to Dec. 1, 2014, which are fair. Turbidity records are fair, except July 1-18, 2014 and Sep. 23, 2014 - Dec. 30, 2014, which are poor. Jan. 5, 2015 to Nov. 30, 2015: Water temperature records good. Specific conductance records good, except July 8, 2015 to July 29, 2015, which are fair, and Oct. 27, 2015 to Nov. 4, 2015, which are poor. pH records good. Dissolved oxygen records good, except May 6, 2015 to May 27, 2015, which are fair. Turbidity records are fair, except May 27, 2015 to Nov. 30, 2015, which are poor. Dec. 1, 2015 to Oct. 10, 2018: Water temperature records good. Specific conductance records good except May 7, 2018 to Oct. 10, 2018, which are fair, and Apr. 4, 2017 to May 5, 2017, which are poor. pH records good except June 6, 2018 to Oct. 10, 2018, which are fair. Dissolved oxygen records good except June 1, 2016, Jan. 4, 2017 to Feb. 8, 2017, Mar. 7, 2017 to Apr. 3, 2017, and Aug. 3, 2017 to Sept. 6, 2017, which are fair, and Apr. 11, 2016 to May 2, 2016, which are poor. Turbidity records are good, except Feb. 23, 2016 to Mar. 8, 2016, March 16, 2016 to Apr. 30, 2016, May 3, 2016 to May 30, 2016, June 25, 2016 to Sept. 5, 2016, Oct. 4-27, 2016, and Sept. 6, 2017 to Jan. 3, 2018, Jan. 27, 2018 to Mar. 6, 2018, May 7, 2018 to Aug. 7, 2018, Sept. 27, 2018 to Oct. 10, 2018, which are fair, and Jan. 5, 2016 to Feb. 2, 2016, March 8-15, 2016, May 1-2, 2016, June 1-24, 2016, Sept. 6 to Oct. 3, 2016, Oct. 28, 2016 to Dec. 1, 2016, and Apr. 28, 2017 to May 5, 2017, Aug. 8, 2018 to Sept. 26, 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 - SPECIFIC CONDUCTANCE: February 1969 to September 1980, June 2011 to current year. pH: December 1976 to September 1980, June 2011 to current year. WATER TEMPERATURE: March to August 1950, February 1969 to September 1980, June 2011 to current year. DISSOLVED OXYGEN: December 1976 to September 1980, June 2011 to current year. TURBIDITY (YSI Environmental, Sensor 6136): June 2011 to May 2021. TURBIDITY (YSI EXO): May 2021 to current year.

INSTRUMENTATION - Water-quality monitor. Electronic data logger set for 15-minute interval.

EXTREMES FOR PERIOD OF RECORD - SPECIFIC CONDUCTANCE: Maximum: 1,870 microsiemens, Feb. 11, 2018. Minimum: 78 microsiemens, Mar. 19, 2012. pH: Maximum: 9.2 units, June 24, 1980, Sept. 14, 2011, and Mar. 30, 2013, Apr. 1, 2013, April 23, 2013, May 3, 2013, and May 19-20, 2016. Minimum: 7.2 units, Aug. 24 and Aug. 25, 2023. WATER TEMPERATURE: Maximum: 35.0 degrees Celsius, July 21, 2011. Minimum: -0.2 degrees Celsius, Jan. 4, 2012, Nov. 18, 2014 to Nov. 19, 2014, and February 12 and 15, 2016. DISSOLVED OXYGEN: Maximum: 18.9 mg/L, Feb. 23, 2021. Minimum: 4.0 mg/L, Sept. 28, 1979. TURBIDITY: Maximum: >1000 FNUs, several days. Minimum: 0.0 FNUs, Aug. 29, 2011, Aug. 17, 2013, Aug. 20, 2013 to Aug. 21, 2013, and Sept. 25, 2019. TURBIDITY (YSI EXO): Maximum: 2,000 FNUs, Aug. 23, 2023. Minimum: 0.1 FNUs, Oct. 8, 2021.