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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 user interface only serves WQX2.2 profiles, which do NOT contain USGS data added after March 11, 2024.

WQP Home >  Providers >  STORET >  EPA_R7_WQX >  EPA_R7_WQX-IA_149

North Twin Lake N of Rockwell City (EPA_R7_WQX-IA_149) site data in the Water Quality Portal

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

This lake site, maintained by the EPA R7 (identifier EPA_R7_WQX), has the name "North Twin Lake N of Rockwell City" and has the identifier EPA_R7_WQX-IA_149. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)07100006.

This site is located in Calhoun County County, Iowa at 42.4799972000 degrees latitude and -94.6368361900 degrees longitude using the datum NAD83. No horizontal location accuracy metadata is available.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "EPA_R7_WQX-IA_149" 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*
Inorganics, Minor, Metals 2002 - 2002
Inorganics, Minor, Non-metals 2002 - 2002
Not Assigned 2002 - 2002
Organics, PCBs 2002 - 2002
Organics, Pesticide 2002 - 2002
*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_R7_WQX
OrganizationFormalName EPA R7
MonitoringLocationIdentifier EPA_R7_WQX-IA_149
MonitoringLocationName North Twin Lake N of Rockwell City
MonitoringLocationTypeName Lake
HUCEightDigitCode 07100006
LatitudeMeasure 42.4799972000
LongitudeMeasure -94.6368361900
HorizontalCollectionMethodName GPS-Unspecified
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 19
CountyCode 025
ProviderName STORET