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New WQX 3.0 profiles are available at waterqualitydata.us/beta/. These profiles will contain recent USGS data added since March 11, 2024, which marks the beginning of limited accessibility for USGS data. Read more about the 3.0 profiles and associated changes here.

This legacy user interface will continue to function for several weeks. However, this user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  NWIS >  USGS-IL >  USGS-05443500

ROCK RIVER AT COMO, IL (USGS-05443500) site data in the Water Quality Portal

Data Provider: NWIS (Learn more about Water Quality Portal Data Providers)

This stream site, maintained by the USGS Illinois Water Science Center (identifier USGS-IL), has the name "ROCK RIVER AT COMO, IL" and has the identifier USGS-05443500. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)07090005. See more details of this site the the USGS NWIS Web page for this site. This site has a drainage area of 8753 sq mi.

This site is located in Whiteside County County, Illinois at 41.77222220000000 degrees latitude and -89.7455556000000 degrees longitude using the datum NAD83. The horizontal location collection method was "Interpolated from Digital MAP." and the accuracy is 1 seconds. This site is at an elevation of 603.13 feet and the accuracy of the elevation measurement, collected using the method "GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System" is .05 feet. The vertical coordinate reference system is NAVD88.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "USGS-05443500" into the "Site ID" box under Site Parameters

What other monitoring locations are upstream or downstream from this one?

Upstream and downstream locations

This map shows all Water Quality Portal stations that are 10 miles upstream (dashed dark blue) and 10 miles downstream (solid light blue) of this monitoring location (indicated by the large blue circle). The upstream and downstream functionality is provided by the Network Linked Data Index.

When were data collected at this location?

Periods of record for data characteristic groups

For a more detailed breakdown of data, go to the Monitoring Report at the EPA How's My Waterway Application
Characteristic Group Date Range*
Biological, Algae, Phytoplankton 2013 - 2015
Biological, Fish 2013 - 2015
Information 2008 - 2021
Inorganics, Major, Metals 1980 - 1997
Inorganics, Major, Non-metals 1977 - 2021
Inorganics, Minor, Metals 1970 - 1997
Inorganics, Minor, Non-metals 1970 - 1997
Microbiological 1979 - 2021
Nutrient 1977 - 1997
Organics, Other 1977 - 2015
Physical 1970 - 2021
*Date ranges may contain gap years

What other information is available for this location?

Detailed Metadata

For the definitions of the metadata elements, please go to the Water Quality Portal user guide

Location Metadata Value
OrganizationIdentifier USGS-IL
OrganizationFormalName USGS Illinois Water Science Center
MonitoringLocationIdentifier USGS-05443500
MonitoringLocationName ROCK RIVER AT COMO, IL
MonitoringLocationTypeName Stream
HUCEightDigitCode 07090005
DrainageAreaMeasure/MeasureValue 8753
DrainageAreaMeasure/MeasureUnitCode sq mi
LatitudeMeasure 41.77222220000000
LongitudeMeasure -89.7455556000000
HorizontalAccuracyMeasure/MeasureValue 1
HorizontalAccuracyMeasure/MeasureUnitCode seconds
HorizontalCollectionMethodName Interpolated from Digital MAP.
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 603.13
VerticalMeasure/MeasureUnitCode feet
VerticalAccuracyMeasure/MeasureValue .05
VerticalAccuracyMeasure/MeasureUnitCode feet
VerticalCollectionMethodName GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System
VerticalCoordinateReferenceSystemDatumName NAVD88
CountryCode US
StateCode 17
CountyCode 195
ProviderName NWIS