Comparison of 2018–19 water years and historical water-quality data, Colorado River Mainstem and major tributaries to the Colorado River, Colorado


This web product summarizes water-quality data collected during water years 1990-2019 for a network of sites on the main stem and major tributaries of the Colorado River in Colorado (fig. 1 and table 1). Current data (2018-2019) for each site are compared to previously collected data and the State of Colorado instream standards. Lowess curves (Helsel and Hirsch, 2002) are provided on plots for selected constituents where a sufficient period of record and limited censored data are available.

Although verified and reviewed, the summaries included in this product should not be considered a formal U.S. Geological Survey publication.