What Does CFS Mean on a River?
CFS stands for cubic feet per second. It measures streamflow: the volume of water moving past a point in the river each second.
What 1 CFS actually means
One cubic foot per second is one cubic foot of water passing a point every second. The U.S. Geological Survey notes that 1 CFS is about 7.48 gallons per second.
That makes CFS a rate, not a river depth. A reading of 5,000 CFS means about 5,000 cubic feet of water are moving past the gauge every second.
Why the same CFS can mean different things on different rivers
A flow that is high on a small creek may be low on a major river. Channel width, depth, slope and shape all affect what a given discharge looks and feels like.
For that reason, CFS is most useful when you compare a gauge with its own recent history, seasonal norms and known recreation ranges rather than comparing raw numbers between unrelated rivers.
How Get Water Data helps
Gauge pages show current streamflow, the recent trend and a historical comparison when enough USGS data is available. River Pulse then turns those measurements into a quick plain-English summary.
Keep learning
These guides summarize public technical information in plain English. Measurements and official thresholds should always be checked at their original source when making safety or flood decisions.