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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-Mark Twain Lake South Fork Arm

Mark Twain Lake South Fork Arm (EPA_R7_WQX-Mark Twain Lake South Fork Arm) 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 "Mark Twain Lake South Fork Arm" and has the identifier EPA_R7_WQX-Mark Twain Lake South Fork Arm. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)07110006.

This site is located in Monroe County County, Missouri at 39.4528500000 degrees latitude and -91.8250500000 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-Mark Twain Lake South Fork Arm" 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 2016 - 2016
*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-Mark Twain Lake South Fork Arm
MonitoringLocationName Mark Twain Lake South Fork Arm
MonitoringLocationTypeName Lake
HUCEightDigitCode 07110006
LatitudeMeasure 39.4528500000
LongitudeMeasure -91.8250500000
HorizontalCollectionMethodName GPS-Unspecified
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 29
CountyCode 137
ProviderName STORET