USGS Water-Year Summary 2020
05418720 Maquoketa River near Green Island, IA
LOCATION - Lat 42°09'49.9", long 90°20'06.3" referenced to North American Datum of 1983, in NE 1/4 NE 1/4 NE 1/4 sec.23, T.85 N., R.5 E., Jackson County, IA, Hydrologic Unit 07060006, on left bank on downstream side of bridge on U.S. Highway 52, 0.9 mi northwest of Green Island, and 2.2 mi upstream from mouth of Mississippi River.
DRAINAGE AREA - 1,869 mi².
PERIOD OF RECORD - Discharge records from April 2014 to October 2018. Stage-only records from October 2018 to current year.
GAGE - Water-stage recorder. Datum of gage is 582.12 ft above North American Vertical Datum of 1988.
PERIOD OF DAILY RECORD -
NITRATE + NITRITE: May 2014 to current year, records fragmentary.
TURBIDITY: August 2014 to current year, records fragmentary.
WATER TEMPERATURE: May 2014 to current year, records fragmentary.