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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 >  21IOWA_WQX >  21IOWA_WQX-10640001

Iowa River near Marshalltown (Hwy 14) (21IOWA_WQX-10640001) 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 Iowa DNR Surface Water Monitoring Data (identifier 21IOWA_WQX), has the name "Iowa River near Marshalltown (Hwy 14)" and has the identifier 21IOWA_WQX-10640001. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)07080208.

This site is located in Marshall County County, Iowa at 42.0660120000 degrees latitude and -92.9080210000 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 "21IOWA_WQX-10640001" 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, Cyanobacteria 1999 - 2000
Biological, Algae, Phytoplankton 1999 - 2000
Biological, Photosynthetic Pigments 1999 - 2000
Inorganics, Major, Non-metals 1999 - 2000
Inorganics, Minor, Metals 1999 - 2000
Inorganics, Minor, Non-metals 1999 - 2000
Microbiological 1999 - 2000
Nutrient 1999 - 2000
Organics, Other 1999 - 2000
Organics, PCBs 1999 - 2000
Organics, Pesticide 1999 - 2000
Physical 1999 - 2000
*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 21IOWA_WQX
OrganizationFormalName Iowa DNR Surface Water Monitoring Data
MonitoringLocationIdentifier 21IOWA_WQX-10640001
MonitoringLocationName Iowa River near Marshalltown (Hwy 14)
MonitoringLocationTypeName River/Stream
MonitoringLocationDescriptionText State Highway 14 bridge N of Marshalltown
HUCEightDigitCode 07080208
LatitudeMeasure 42.0660120000
LongitudeMeasure -92.9080210000
SourceMapScaleNumeric 0
HorizontalCollectionMethodName Interpolation-Map
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 19
CountyCode 127
ProviderName STORET