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Colorado Data Sharing Network

Colorado Water Quality Monitoring Council webpage has been combined with Colorado Data Sharing Network (CDSN)

Please go to the CDSN webpage at for most recent updates.

The Colorado Data Sharing Network (CDSN) is the primary project of the CWQMC. The CDSN is a revolutionary way for organizations to share data with the public and with each other. After data is collected by organizations around the state, it can be easily uploaded and viewable on the web. Each time data is shared, it not only increases the knowledge of water quality around the state, but hopefully saves time and resources for others who are interested in monitoring in a given basin.

We would like to thank our generous supporters who donate to support the CDSN: SP CURE, Metro Wastewater Reclamation District, Thornton Water, Centennial Water & Sanitation District, Northern Colorado Water Conservation District, Barr/Milton Watershed Association, San Juan Watershed Group, Julie Kinsey, Aurora Water, and many others!

To view the CDSN, check out some of the following links:

GIS map

To view all water quality sampling locations using a GIS map, click on the following link (email registration required):


**Keep in mind that points will not appear until you are zoomed in to a specific area. You can download data directly from the map by clicking on a sampling location dot. NWIS and STORET data and locations are also displayed on the map.

Google Map

Google map allows data to be downloaded directly from AWQMS monitoring locations; and provides links to download data from USGS and EPA National Data Warehouse monitoring locations. Click on a monitoring location to download data.

With the Exceedance filter on, data that exceeds will be red to distinguish from the data that does not exceed the filter request on the AWQMS monitoring locations.

CDSN Exceedance/Monitoring Location Mapper

To download data:

Anyone can download data from the DSN. To gain access to Water Quality Data around the state, login to the DSN portal using cdsnpublic as both the USERNAME and PASSWORD.

To upload data:

To upload data to the CDSN you must have a unique username and password assigned to you. You can obtain one of these by emailing for the current costs. Once you have your own username and password, you can upload as much data as you like.

For more information on downloading or uploading data and to access links to the portal, please go to the CDSN website: