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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 >  STORET >  EPA_GLNPO >  EPA_GLNPO-ER31

ER31 (EPA_GLNPO-ER31) site data in the Water Quality Portal

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

This great lake site, maintained by the EPA Great Lakes National Program (identifier EPA_GLNPO), has the name "ER31" and has the identifier EPA_GLNPO-ER31. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)04120200.

This site is located at 42.2535101408 degrees latitude and -81.1072438028 degrees longitude using the datum UNKWN. The horizontal location collection method was "Loran C" and the accuracy is 100 m.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "EPA_GLNPO-ER31" 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 1996 - 2006
Biological, Algae, Phytoplankton 1996 - 2004
Biological, Algae, Phytoplankton, Photosynthetic Pigments 1986 - 2021
Biological, Algae,Phytoplankton,Cyanobacteria,Photosynthetic 1996 - 2014
Biological, Counts 1996 - 2019
Information 1985 - 2023
Inorganics, Major, Metals 2004 - 2021
Inorganics, Major, Non-metals 1986 - 2019
Inorganics, Minor, Metals 2016 - 2021
Inorganics, Minor, Non-metals 2016 - 2019
Not Assigned 1993 - 2023
Nutrient 1986 - 2021
Organics, PCBs 1993 - 1993
Physical 1986 - 2023
*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 EPA_GLNPO
OrganizationFormalName EPA Great Lakes National Program
MonitoringLocationIdentifier EPA_GLNPO-ER31
MonitoringLocationName ER31
MonitoringLocationTypeName Great Lake
MonitoringLocationDescriptionText Open Lake sampling station
HUCEightDigitCode 04120200
LatitudeMeasure 42.2535101408
LongitudeMeasure -81.1072438028
HorizontalAccuracyMeasure/MeasureValue 100
HorizontalAccuracyMeasure/MeasureUnitCode m
HorizontalCollectionMethodName Loran C
HorizontalCoordinateReferenceSystemDatumName UNKWN
CountryCode LE
ProviderName STORET