Historical Annual Runoff
Click here to download a PDF of the Historical Annual Colorado River Runoff diagram
- Annual totals by water year (Oct 1 – Sep 30).
- Most recent water year data may be provisional.
- Years with incomplete gauge data have been omitted.
- Annual runoff totals are in units of 1000 Acre-Feet.
Graphs are interactive, hovering over data will show the runoff values.
Colorado Water Supply Outlook
The Natural Resource Conservation Service water supply outlook, as of May 1, 2018, contains the following estimates of runoff for the April through July 2018 period at the following gauges (Note: Not all gauges shown to the left are forecasted, in which case a representative gauge from the outlook report was chosen):