Castor River at Zalma water level

Name: Castor River at Zalma water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Castor River, Missouri, United States

Directions

Normal for mid-October

Water level

1.06ft Steady over the last 24 hours

Measured Oct 18, 2026, 05:45 AM CDT (56 min ago)

Flow: 80.1 cfs

History

7 days

Water level

What this means

The Castor River at Zalma is at 1.06 ft, in the normal range for mid-October.

The level has held steady over the past 24 hours. In the last month it has stayed between 1.02 ft and 1.07 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Compared with 5 years of daily readings for this time of year. How to read levels

Key numbers

Highest on record: 29.92 ftDecember 2, 1982

Floating and fishing near Castor River at Zalma

Normal flows mean predictable rapids and good access at most put-ins.

Highest crests on record

Rank	Level	Date
1	29.92 ft	December 2, 1982

Weather at the gauge

The forecast is not available right now.

Sunrise 07:11 AM Sunset 06:21 PM Daylight 11 hr, 9 min First quarter 49%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
St. Francis River at WappapelloRiver gauge, St. Francis River	171 cfs	Normal	±0	18 mi
St. Francis River near PattersonRiver gauge, St. Francis River	4.55 ft	Below flood stage	−0.01 ft	24 mi
Big Creek at Sam A Baker State ParkRiver gauge, Big Creek	25.3 cfs	Very low	−1.1 cfs	25 mi
St. Francis River near SacoRiver gauge, St. Francis River	1.76 ft	Below flood stage	−0.01 ft	27 mi
Little River Ditch No. 1 near MorehouseRiver gauge, Little River Ditch No. 1	70.5 cfs	Normal	+1.4 cfs	29 mi
Black River at Poplar BluffRiver gauge, Black River	−0.34 ft	Below flood stage	−0.12 ft	32 mi
St. Francis River near Mill CreekRiver gauge, St. Francis River	0.54 ft	Below flood stage	−0.02 ft	32 mi
Mississippi River at Cape GirardeauRiver gauge, Mississippi River	18.19 ft	Below flood stage	−0.67 ft	32 mi

Questions and answers

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Castor River at Zalma today?

On Oct 18, 2026, 05:45 AM CDT, the water level was 1.06 ft. Steady over the last 24 hours.

Is Castor River at Zalma rising or falling?

Steady over the last 24 hours.

Is the level of Castor River at Zalma normal?

Normal for mid-October. Compared with 5 years of daily readings for this time of year.

What is the highest water level ever recorded at Castor River at Zalma?

The highest level on record is 29.92 ft on December 2, 1982.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from the U.S. Geological Survey, the official operator of this gauge, and are in the public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:07021000 (Agency page)
Coordinates: 37.14664, -90.07550 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	1.06 ft	2026-10-18 10:45	Provisional
Flow	80.1 cfs	2026-10-18 10:45	Provisional

Download

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How to cite

U.S. Geological Survey: Castor River at Zalma (usgs:07021000). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-states/missouri/castor-river-at-zalma

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer