How high is the Iroquois River at Iroquois, IL right now?

The Iroquois River at Iroquois, IL is currently flowing at 164 cubic feet per second with a gage height of 5.63 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Iroquois River at Iroquois, IL normal for this time of year?

Current flow is classified as low for June 11. Today's discharge is at the 12th percentile compared to the long-term historical record at this gauge.

Is the Iroquois River at Iroquois, IL at flood stage?

No — the gage height is 12.37 feet below the NWS flood-stage threshold of 18.0 feet.

What is the historical median flow for the Iroquois River at Iroquois, IL on June 11?

The long-term median discharge for this date is 438 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 146 to 3,200 cfs.

Where is the Iroquois River at Iroquois, IL stream gauge located?

The Iroquois River at Iroquois, IL stream gauge is operated by the USGS in Iroquois County, IL on the Iroquois River. USGS site number 05525000 (coordinates 40.8231, -87.5817).

Iroquois River at Iroquois, IL

USGS Site No: 05525000 • Iroquois River • Iroquois County, IL

Iroquois River at Iroquois, IL on the Iroquois River is currently at 164 cfs (Low — 12th percentile for this date) . Gage height: 5.63 ft.

Reading from 1 week ago

Downstream on Iroquois River ↓

Iroquois River Near Chebanse, IL

164

CFS Discharge

5.63

Gage Height (ft)

Low

Flow Condition

Normal

Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for June 11 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile	Label	CFS Threshold	Today's Flow
10th	Very Low threshold	146
25th	Low threshold	262	Today: 164 cfs
50th (Median)	Normal (median)	438
75th	High threshold	992
95th	Very High threshold	3,200

30-Day Hydrograph

Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.

10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date	Discharge (CFS)	Gage Ht (ft)
May 28, 2026	179	5.75
May 27, 2026	187	5.82
May 26, 2026	196	5.90
May 25, 2026	205	5.98
May 24, 2026	214	6.05
May 23, 2026	218	6.08
May 22, 2026	231	6.18
May 21, 2026	255	6.36
May 20, 2026	269	6.46
May 19, 2026	252	6.34
May 18, 2026	256	6.37
May 17, 2026	270	6.47
May 16, 2026	279	6.53
May 15, 2026	291	6.61
Apr 20, 2026	1,540	12.84
Apr 19, 2026	1,600	13.06
Apr 18, 2026	1,420	12.37
Apr 17, 2026	1,240	11.64
Apr 16, 2026	1,040	10.74
Apr 15, 2026	583	8.35
Apr 14, 2026	494	7.83
Apr 13, 2026	539	8.10
Apr 12, 2026	623	8.61
Apr 11, 2026	803	9.59
Apr 10, 2026	1,100	11.04
Apr 9, 2026	1,440	12.46
Apr 8, 2026	1,760	13.67
Apr 7, 2026	2,050	14.69
Apr 6, 2026	2,290	15.46
Apr 5, 2026	2,400	15.82

Station Information

USGS Site No: 05525000
State: IL
County: Iroquois County
Coordinates: 40.8231, -87.5817
Drainage Area: 686 mi²
Datum (ft): 614.1
HUC Code: 07120002

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 17.0 ft
Flood Stage: 18.0 ft
Moderate Flood: 24.0 ft
Major Flood: 25.0 ft

Currently 12.37 ft below flood stage.

Recent Extremes

Max discharge: 2,400 cfs

Apr 5, 2026
Min discharge: 27 cfs

Oct 15, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Sugar Creek at Milford, IL
15.3 mi · 48 cfs

Very Low
Iroquois River Near Chebanse, IL
18.0 mi · 574 cfs

Low
Iroquois River Near Parr, IN
22.0 mi · 3 cfs

Unknown
Kankakee River at Momence, IL
23.7 mi · 1,750 cfs

Normal
Kankakee River at Shelby, IN
27.9 mi · 1,470 cfs

Normal