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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 >  21COL001_WQX >  21COL001_WQX-5507A1

UNION RESERVOIR SITE 1 TOP (21COL001_WQX-5507A1) site data in the Water Quality Portal

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

This reservoir site, maintained by the Colorado Dept. of Public Health & Environment-WQCD (identifier 21COL001_WQX), has the name "UNION RESERVOIR SITE 1 TOP" and has the identifier 21COL001_WQX-5507A1. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)10190005.

This site is located in Weld County County, Colorado at 40.1820750000 degrees latitude and -105.0391980000 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 "21COL001_WQX-5507A1" 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, Phytoplankton 2007 - 2021
Information 2007 - 2021
Inorganics, Major, Metals 2007 - 2021
Inorganics, Major, Non-metals 2007 - 2021
Inorganics, Minor, Metals 2007 - 2021
Inorganics, Minor, Non-metals 2007 - 2021
Nutrient 2007 - 2021
Organics, Other 2021 - 2021
Physical 2007 - 2021
Radiochemical 2016 - 2021
*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 21COL001_WQX
OrganizationFormalName Colorado Dept. of Public Health & Environment-WQCD
MonitoringLocationIdentifier 21COL001_WQX-5507A1
MonitoringLocationName UNION RESERVOIR SITE 1 TOP
MonitoringLocationTypeName Reservoir
MonitoringLocationDescriptionText MID-LAKE
HUCEightDigitCode 10190005
LatitudeMeasure 40.1820750000
LongitudeMeasure -105.0391980000
SourceMapScaleNumeric 0
HorizontalCollectionMethodName GPS Code (Pseudo Range) Standard Position (SA Off)
HorizontalCoordinateReferenceSystemDatumName NAD83
CountryCode US
StateCode 08
CountyCode 123
ProviderName STORET