Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

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 >  COEOMAHA_WQX >  COEOMAHA_WQX-CHTLKMLW1

CHTLKMLW1 (COEOMAHA_WQX-CHTLKMLW1) site data in the Water Quality Portal

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

This reservoir site, maintained by the US Army Corps of Engineers Omaha District (identifier COEOMAHA_WQX), has the name "CHTLKMLW1" and has the identifier COEOMAHA_WQX-CHTLKMLW1. This site is in the watershed defined by the 8 digit Hydrologic Unit Code (HUC)10190002.

This site is located in Jefferson County County, Colorado at 39.5437500000 degrees latitude and -105.0770000000 degrees longitude using the datum OTHER. 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 "COEOMAHA_WQX-CHTLKMLW1" 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 2018 - 2018
Information 2018 - 2018
Physical 2018 - 2018
*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 COEOMAHA_WQX
OrganizationFormalName US Army Corps of Engineers Omaha District
MonitoringLocationIdentifier COEOMAHA_WQX-CHTLKMLW1
MonitoringLocationName CHTLKMLW1
MonitoringLocationTypeName Reservoir
MonitoringLocationDescriptionText Chatfield Reservoir Mid-Lake West site
HUCEightDigitCode 10190002
LatitudeMeasure 39.5437500000
LongitudeMeasure -105.0770000000
HorizontalCollectionMethodName Unknown
HorizontalCoordinateReferenceSystemDatumName OTHER
CountryCode US
StateCode 08
CountyCode 059
ProviderName STORET