Castor River at Zalma, MO

Bollinger County, Missouri · USGS gauge 07021000 · NWS ZCRM7 · Castor River flood status · Missouri river levels

Is Castor River at Zalma, MO flooding right now?

Castor River at Zalma, MO measured 1.02 ft on 2026-09-22 21:45:00 UTC. No NWS minor flood stage is published for this gauge.

Gauge height

1.02 ft

as of 36 min ago

Streamflow

76 cfs

data refreshed 5 min ago

The highest crest on record was 29.92 ft on Thu, Dec 2, 1982.

Streamflow outlook

NOAA National Water Model forecast, issued 10 hours ago. The NWM models discharge for every river reach in the country, including the many gauges the National Weather Service does not forecast individually. It is a model, not an official NWS river forecast, and it predicts flow rather than water level.

No National Weather Service flood stage is published for this gauge, so no flood category can be shown — why some gauges have no flood stage.

Highest crests on record

Stage	Date
29.92 ft	1982-12-02

Last 7 days

Past 7 days · 0.98–1.23 ft

Nearby gauges

Gauge	Distance	County
Castor River at Greenbriar, MO	3.8 mi	Bollinger County
St. Francis River at Wappapello, MO	18.3 mi	Wayne County
St. Francis River near Patterson, MO	23.8 mi	Wayne County
Big Creek at Sam A Baker State Park, MO	24.9 mi	Wayne County
St. Francis River at Fisk, MO	26.2 mi	Stoddard County

Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.

Sources: USGS monitoring location · NWS gauge & forecast