Castor River River Levels

Last Updated: December 4, 2025

The Castor River is a 51-mile-long river located in southeastern Missouri.


Summary

Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Castor River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Castor River, the highest being situated at an altitude of ft, the .

       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Castor River At Zalma
USGS 07021000
323 cfs 2.82 ft -7.71
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Castor River is a river in eastern Ontario, in Canada. It flows into the South Nation River near Casselman. It has a number of branches, including the North, Middle, South and East Castor Rivers which join in Embrun. The river was named for the many beaver dams found in its watershed; "castor" means "beaver" in French.