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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 >  CORIVWCH_WQX >  CORIVWCH_WQX-122

Boulder Cr - Jct 4 Mile Cr (CORIVWCH_WQX-122) 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 (Volunteer) (identifier CORIVWCH_WQX), has the name "Boulder Cr - Jct 4 Mile Cr" and has the identifier CORIVWCH_WQX-122. 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 40.0149150500 degrees latitude and -105.3210407000 degrees longitude using the datum NAD83. No horizontal location accuracy metadata is available. This site is at an elevation of 5700 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-122" 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*
Inorganics, Minor, Metals 1991 - 1995
Physical 1991 - 1995
*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 (Volunteer)
MonitoringLocationIdentifier CORIVWCH_WQX-122
MonitoringLocationName Boulder Cr - Jct 4 Mile Cr
MonitoringLocationTypeName River/Stream
MonitoringLocationDescriptionText From city of Boulder, take state hwy 119 to approx 1.5 mi west of town; sample at bridge over Boulder Cr (about 1/4 mi downstream from confluence with Fourmile Cr)
HUCEightDigitCode 10190005
LatitudeMeasure 40.0149150500
LongitudeMeasure -105.3210407000
SourceMapScaleNumeric 160000
HorizontalCollectionMethodName Interpolation-Map
HorizontalCoordinateReferenceSystemDatumName NAD83
VerticalMeasure/MeasureValue 5700
VerticalMeasure/MeasureUnitCode ft
VerticalCollectionMethodName Topographic Map Interpolation
VerticalCoordinateReferenceSystemDatumName SEALV
CountryCode US
StateCode 08
CountyCode 013
ProviderName STORET