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Colorado Real-time Water Quality Surrogates

Colorado Real-time Water Quality Surrogates

Real-time computed concentrations of water-quality constituents such as suspended sediment, total nitrogen, and total phosphorus are calculated using ordinary least squares regression models. The results of these models, along with direct water-quality measurements, can be viewed here as time-series graphs, or downloaded as tabular data.

Ordinary least squares regression models on this site use conventional sensor measurements (for example, discharge, temperature, pH, specific conductance, turbidity, and dissolved oxygen) to compute concentrations and loads of other water-quality constituents in real time. This makes it possible to compute instantaneous values of many constituents in real time for public safety without the lengthy time delay of collecting a sample and waiting for analysis of a sample at a laboratory.

Please select a site from below to start viewing data. You also can read more about the methods, measured constituents, and disclaimers by using the navigation bar at the top of each page.

Map Legend


Continuous Water-Quality Gage
Discontinued Continuous Water-Quality Gage
Station Name Station Identifier County Computation Period
Colorado River above Glenwood Springs, CO 09071750 Garfield Jan. 2013 to present
Colorado River below Glenwood Springs, CO 09085100 Garfield Jan. 2014 to present
Colorado River near Cameo, CO 09095500 Mesa Jan. 2013 to present
Colorado River near Colorado-Utah State Line 09163500 Mesa Jan. 2013 to present
Dolores River at Bedrock, CO 09169500 Montrose Jan. 2013 to present
Dolores River near Bedrock, CO 09171100 Montrose Jan. 2013 to present
Gunnison River at Delta, CO 09144250 Delta Jan. 2013 to present
Gunnison River near Grand Junction, CO 09152500 Mesa Jan. 2013 to present
North Fk Gunnison River above mouth near Lazear, CO 09136100 Delta Jan. 2013 to present
Piceance Creek at White River, CO 09306222 Rio Blanco Jan. 2013 to present
Piceance Creek below Ryan Gulch, near Rio Blanco, CO 09306200 Rio Blanco Jan. 2013 to present
Roaring Fork River at Glenwood Springs, CO 09085000 Garfield Jan. 2014 to present
Uncompahgre River at Colona, CO 09147500 Ouray Jan. 2013 to present
Uncompahgre River at Delta, CO 09149500 Delta Jan. 2013 to present
Yampa River near Maybell, CO 09251000 Moffat Jan. 2013 to present
Yellow Creek near White River, CO 09306255 Rio Blanco Jan. 2008 to Sept. 2015


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URL: http://nrtwq.usgs.gov/co/
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Page Last Modified: Wed 06 October 2010