The water-quality data stored in the USGS Colorado Water-Quality Data Repository (CWQDR) website include USGS data as well as data from several non-USGS organizations. USGS data stored on this site were obtained from the National Water Information System (NWIS) and may not have received Director's approval and as such are provisional and subject to revision. USGS data are released on the condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
The USGS has included non-USGS data sets in this repository to enhance public access to water-quality information. All non-USGS data are provisional and subject to revision. The USGS is not responsible for the accuracy, completeness, reliability or timeliness of any non-USGS information obtained from this system. These data have been collected under a wide variety of sampling, analytical, and quality assurance conditions. Data users should be aware of these qualifications, and use data from this site with caution.