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WQP Home >  Providers >  STEWARDS >  ARS >  ARS-IAWC-IAWC340

IAWC340 (ARS-IAWC-IAWC340) site data in the Water Quality Portal

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

This river/stream site, maintained by the Agricultural Research Service (identifier ARS), has the name "IAWC340" and has the identifier ARS-IAWC-IAWC340. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)07080105.

This site is located in Story County County, Iowa at 41.9656868884 degrees latitude and -93.658412759 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 "ARS-IAWC-IAWC340" 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.

Leaflet USGS The National Map: National Boundaries Dataset, 3DEP Elevation Program, Geographic Names Information System, National Hydrography Dataset, National Land Cover Database, National Structures Dataset, and National Transportation Dataset; USGS Global Ecosystems; U.S. Census Bureau TIGER/Line data; USFS Road data; Natural Earth Data; U.S. Department of State HIU; NOAA National Centers for Environmental Information. Data refreshed February, 2025.

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*
Nutrient 1990 - 2013
Organics, Pesticide 1990 - 2008
Sediment 2013 - 2013
*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 ARS
OrganizationFormalName Agricultural Research Service
MonitoringLocationIdentifier ARS-IAWC-IAWC340
MonitoringLocationName IAWC340
MonitoringLocationTypeName River/Stream
MonitoringLocationDescriptionText A water quality station known as Black's West Bridge and is located along the main stream of Walnut Creek, above WC 310 and upstream from WC 122. Manual water samples were collected weekly. (also called WC 121). Water samples from this site are tested for Acetochlor, Alachlor, Atrazine, Metolachlor, Simazine, and nitrate.
HUCEightDigitCode 07080105
LatitudeMeasure 41.9656868884
LongitudeMeasure -93.658412759
HorizontalCollectionMethodName GPS Code (Pseudo Range) Differential
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 19
CountyCode 169
ProviderName STEWARDS