Research & Data > Monitoring & Assessment > River & stream monitoring > Flow monitoring

River and stream flow monitoring

We maintain a network of stream-gaging stations that report streamflow conditions in rivers and streams across the state. The information is used to monitor flow conditions for recreational activities, water supplies for migrating fish, and to develop strategies to respond to climate change. All of the data we collect are available to view and download.


How are rivers and streams doing right now?

Check out our Statewide Stream Summary Map through the link or below to see near real-time summaries of streamflow conditions around the state. Color-coded dots indicate if today's flows are above or below normal for this time of year. Scroll through the legend on the map to learn more. Clear the legend away by clicking on the X in its corner.

Description: Statewide Streamflow Summary Map provides more details about the map.

Collapse the legend in the left-hand corner by choosing X.

Find river and stream data

The Flow Monitoring Network application shows current streamflows at active monitoring stations and historic flows at discontinued stations.

Using streamflow data offers a step-by-step explanation on how to find a stream station and read data to understand how much water is in your river or stream.

Learn about streamflow monitoring methods

Flow monitoring methods for rivers & streams describes how we measure how much water flows through rivers and streams.