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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 >  NWIS >  USGS-IA >  USGS-411940093060101

075N20W01DDAA 19961 1967Knoxville 1 (USGS-411940093060101) site data in the Water Quality Portal

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

This well site, maintained by the USGS Iowa Water Science Center (identifier USGS-IA), has the name "075N20W01DDAA 19961 1967Knoxville 1" and has the identifier USGS-411940093060101. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)07100008. See more details of this site the the USGS NWIS Web page for this site.

This site is located in Marion County County, Iowa at 41.32360760000000 degrees latitude and -93.1004816000000 degrees longitude using the datum NAD83. The horizontal location collection method was "Interpolated from MAP." and the accuracy is 5 seconds. The source map scale is 1:24000. This site is at an elevation of 900 feet and the accuracy of the elevation measurement, collected using the method "Interpolated from topographic map." is 5 feet. The vertical coordinate reference system is NGVD29.

This site is located in the "Cambrian-Ordovician aquifer system" aquifer. The geologic formation type is Ordovician System. The aquifer is a Confined multiple aquifers type. The well was contructed on 19671012. The well depth is 2290 ft. The well hole depth is 2290 ft.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "USGS-411940093060101" 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*
Information 1967 - 2008
Inorganics, Major, Metals 1967 - 2005
Inorganics, Major, Non-metals 1967 - 2008
Inorganics, Minor, Metals 1967 - 2005
Inorganics, Minor, Non-metals 1971 - 2005
Microbiological 2005 - 2005
Nutrient 1967 - 2005
Organics, Other 2005 - 2008
Organics, Pesticide 2005 - 2008
Physical 1967 - 2008
Radiochemical 1969 - 2005
Stable Isotopes 2005 - 2008
*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 USGS-IA
OrganizationFormalName USGS Iowa Water Science Center
MonitoringLocationIdentifier USGS-411940093060101
MonitoringLocationName 075N20W01DDAA 19961 1967Knoxville 1
MonitoringLocationTypeName Well
HUCEightDigitCode 07100008
LatitudeMeasure 41.32360760000000
LongitudeMeasure -93.1004816000000
SourceMapScaleNumeric 24000
HorizontalAccuracyMeasure/MeasureValue 5
HorizontalAccuracyMeasure/MeasureUnitCode seconds
HorizontalCollectionMethodName Interpolated from MAP.
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 900
VerticalMeasure/MeasureUnitCode feet
VerticalAccuracyMeasure/MeasureValue 5
VerticalAccuracyMeasure/MeasureUnitCode feet
VerticalCollectionMethodName Interpolated from topographic map.
VerticalCoordinateReferenceSystemDatumName NGVD29
CountryCode US
StateCode 19
CountyCode 125
AquiferName Cambrian-Ordovician aquifer system
FormationTypeText Ordovician System
AquiferTypeName Confined multiple aquifers
ConstructionDateText 19671012
WellDepthMeasure/MeasureValue 2290
WellDepthMeasure/MeasureUnitCode ft
WellHoleDepthMeasure/MeasureValue 2290
WellHoleDepthMeasure/MeasureUnitCode ft
ProviderName NWIS