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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 >  MDNR >  MDNR-221/1.0

Dardenne Cr.@ Salt River Rd. (MDNR-221/1.0) site data in the Water Quality Portal

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

This river/stream site, maintained by the Missouri Dept. of Natural Resources (identifier MDNR), has the name "Dardenne Cr.@ Salt River Rd." and has the identifier MDNR-221/1.0. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)07110009.

This site is located in St. Charles County County, Missouri at 38.8029967758 degrees latitude and -90.6292982620 degrees longitude using the datum NAD83. The horizontal location collection method was "Interpolation-Map" and the accuracy is 12 m. The source map scale is 1:24000.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "MDNR-221/1.0" 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, Major, Metals 1998 - 2000
Inorganics, Major, Non-metals 1998 - 2007
Microbiological 1998 - 2007
Nutrient 1998 - 2007
Physical 1998 - 2007
*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 MDNR
OrganizationFormalName Missouri Dept. of Natural Resources
MonitoringLocationIdentifier MDNR-221/1.0
MonitoringLocationName Dardenne Cr.@ Salt River Rd.
MonitoringLocationTypeName River/Stream
MonitoringLocationDescriptionText Dardenne Cr. at old Hwy. C, Surv. 462,47N,3E
HUCEightDigitCode 07110009
LatitudeMeasure 38.8029967758
LongitudeMeasure -90.6292982620
SourceMapScaleNumeric 24000
HorizontalAccuracyMeasure/MeasureValue 12
HorizontalAccuracyMeasure/MeasureUnitCode m
HorizontalCollectionMethodName Interpolation-Map
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 29
CountyCode 183
ProviderName STORET