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Iroquois River at Iroquois water level

River gauge, Iroquois River, Illinois, United States

Directions

Normal for mid-October

Water level

5.54ft Down 0.07 ft over the last 24 hours

Flow
122 cfs
10 20 Highest onrecord 26.31 ft Minor floodstage 18.00 ft

History

51015ftOct 13Oct 14Oct 16Oct 17Oct 19Minor flood stage51015ftOct 13Oct 16Oct 19Minor flood stage
51015ftSep 20Sep 27Oct 4Oct 12Oct 19Minor flood stage51015ftSep 20Oct 4Oct 19Minor flood stage
5101520ftOct 2025Jan 2026Apr 2026Jul 2026Oct 2026Minor flood stage5101520ftOct 2025Apr 2026Oct 2026Minor flood stage
5101520ftJanMarMayJulSepNov20265101520ftJanAprJulOct2026

20252026

Water level Normal range (10–90 %) Minor flood stage

What this means

The Iroquois River at Iroquois is at 5.54 ft, in the normal range for mid-October.

The median for mid-October is 4.51 ft, based on 36 years of readings, so the river stage is 1.03 ft above typical. It is 12.46 ft below the flood stage of 18.00 ft. On the same day last year the reading was 3.87 ft, a difference of +1.67 ft.

It has dropped 0.07 ft over the past 24 hours. In the last month it has stayed between 5.20 ft and 7.83 ft.

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

Compared with 36 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
4.51 ft1.03 ft above the median for this date
Normal for this date
3.74 ft – 14.53 ft8 years in 10 fall in this range (36 years of records)
Same day last year
3.87 ft+1.67 ft
Lowest and highest in 30 days
5.20 ft – 7.83 ft
Lowest and highest in 12 months
3.84 ft – 15.82 ft
Highest on record
26.31 ftJune 13, 1958

Floating and fishing near Iroquois River at Iroquois

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

Flood stage here is 18.00 ft, 12.46 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

29.60 ft
Water reaches bottom of Route 52 bridge.
27.00 ft
Residences threatened near US-52/Main Street in Iroquois.
26.50 ft
US-52/Main Street threatened near the river in Iroquois.
26.00 ft
Widespread inundation of structures and roads begins in east Watseka.
25.00 ft
Flooding of some buildings near the river begins.
21.50 ft
County Road 1950N threatened north of Watseka.
18.00 ft
Agricultural areas near the river begin to flood.
5.54 ft
Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Chance of at least minor flooding in October to December: 29 %.

RankLevelDate
126.31 ftJune 13, 1958
226.17 ftFebruary 22, 2018
325.81 ftJanuary 9, 2008
425.74 ftJuly 12, 2003
525.27 ftJune 21, 2015
625.16 ftJuly 12, 2015
724.80 ftMarch 11, 2009
824.59 ftDecember 30, 1990
923.81 ftMarch 5, 1979
1023.54 ftJanuary 14, 2005

Weather at the gauge

Rain in the last 3 days: 0.06 in. Rain that falls upstream can take hours or days to show up at a river gauge.

18 Sun 64° 34° – Wind 16 mph
19 Mon 68° 37° – Wind 6 mph
20 Tue 69° 38° – Wind 7 mph
21 Wed 70° 49° – Wind 7 mph
22 Thu 72° 52° – Wind 5 mph
23 Fri 72° 53° – Wind 9 mph
24 Sat 73° 51° – Wind 12 mph

Forecast: Open-Meteo

Sunrise 07:06 AM Sunset 06:05 PM Daylight 10 hr, 59 min First quarter 57%

Map

Other gauges on the Iroquois River

Gauge Level Compared with normal 24 hours Distance
Iroquois River near ParrRiver gauge, Iroquois River 0.4 cfs Normal ±0 22 mi
Iroquois River at RensselaerRiver gauge, Iroquois River 4.11 ft Below flood stage −0.10 ft 25 mi
Iroquois River near ForesmanRiver gauge, Iroquois River 5.34 ft Below flood stage −0.08 ft 15 mi
Iroquois River near ChebanseRiver gauge, Iroquois River 2.88 ft Normal −0.03 ft 18 mi

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Sugar Creek at MilfordRiver gauge, Sugar Creek 2.84 ft Low −0.02 ft 15 mi
Carpenter Creek at RemingtonRiver gauge, Carpenter Creek 3.35 ft Below flood stage ±0 22 mi
Kankakee River at MomenceRiver gauge, Kankakee River 2.03 ft Normal −0.01 ft 24 mi
Kankakee River at ShelbyRiver gauge, Kankakee River 5.87 ft Below flood stage −0.02 ft 28 mi
Big Pine Creek at Pine VillageRiver gauge, Big Pine Creek 4.00 ft Below flood stage −0.02 ft 31 mi
North Fork Vermilion River near BismarckRiver gauge, North Fork Vermilion River 4.92 ft Normal −0.03 ft 39 mi

Questions and answers

Is the Iroquois River at Iroquois higher than last year?

Yes, it is 1.67 ft higher than on the same day last year, when the reading was 3.87 ft.

What is flood stage for the Iroquois River at Iroquois?

The official flood stage is 18.00 ft. The level is currently 12.46 ft below it.

What is a normal level for the Iroquois River at Iroquois in mid-October?

The median for mid-October is 4.51 ft. In 8 years out of 10 the reading falls between 3.74 ft and 14.53 ft, based on 36 years of records.

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 Iroquois River at Iroquois today?

On Oct 19, 2026, 03:00 AM CDT, the water level was 5.54 ft. Down 0.07 ft over the last 24 hours.

Is Iroquois River at Iroquois rising or falling?

Down 0.07 ft over the last 24 hours. Down 0.20 ft over the last 7 days.

Is the level of Iroquois River at Iroquois normal?

Normal for mid-October. Compared with 36 years of daily readings for this time of year.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
U.S. Geological Survey
Station code
usgs:05525000 (Agency page)
Coordinates
40.82306, -87.58167 (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

ParameterLast valueTime (UTC)Quality
Water level 5.54 ft 2026-10-19 08:00 Provisional
Flow 122 cfs 2026-10-19 08:00 Provisional

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How to cite

U.S. Geological Survey: Iroquois River at Iroquois (usgs:05525000). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/illinois/iroquois-river-at-iroquois

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