The Arroyo Colorado River Water Quality Database is now currently available as queriable on-line program or as a file that can be downloaded. The downloaded files are the original database files that were created with Paradox 4.0 and can be easily read with this version or a later version such as Paradox 7 for Windows 95 and Windows NT.

The water quality data is split into four databases, including one for each tidal and non-tidal segment of the river, one for the tributaries to the Arroyo Colorado River and one for a subsequent toxic study. The following links detail the information found in these databases.