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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 >  CORIVWCH_WQX >  CORIVWCH_WQX-423

St Vrain - 75th St Br (CORIVWCH_WQX-423) 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 Colorado River Watch (identifier CORIVWCH_WQX), has the name "St Vrain - 75th St Br" and has the identifier CORIVWCH_WQX-423. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)10190005.

This site is located in Boulder County County, Colorado at 40.1776390000 degrees latitude and -105.1785804000 degrees longitude using the datum NAD83. No horizontal location accuracy metadata is available. This site is at an elevation of 5070 ft No vertical location accuracy metadata is available.

To download the metadata about this site along with water quality data, go to the Portal Page and enter "CORIVWCH_WQX-423" 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, Counts 2001 - 2001
Inorganics, Major, Metals 2008 - 2019
Inorganics, Major, Non-metals 2008 - 2010
Inorganics, Minor, Metals 1994 - 2019
Inorganics, Minor, Non-metals 2008 - 2019
Nutrient 2008 - 2010
Physical 1994 - 2019
*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 CORIVWCH_WQX
OrganizationFormalName Colorado River Watch
MonitoringLocationIdentifier CORIVWCH_WQX-423
MonitoringLocationName St Vrain - 75th St Br
MonitoringLocationTypeName River/Stream
MonitoringLocationDescriptionText From town of Hygiene, travel approx 3/4 mi south on 75th St to bridge over St Vrain. Station is 30 yds west of bridge.
HUCEightDigitCode 10190005
LatitudeMeasure 40.1776390000
LongitudeMeasure -105.1785804000
SourceMapScaleNumeric 160000
HorizontalCollectionMethodName Interpolation-Map
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 5070
VerticalMeasure/MeasureUnitCode ft
VerticalCollectionMethodName Topographic Map Interpolation
VerticalCoordinateReferenceSystemDatumName SEALV
CountryCode US
StateCode 08
CountyCode 013
ProviderName STORET