How high is the Nb Chicago River at North Pulaski Road at Chicago, IL right now?

The Nb Chicago River at North Pulaski Road at Chicago, IL is currently flowing at 32 cubic feet per second with a gage height of 10.86 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Nb Chicago River at North Pulaski Road at Chicago, IL normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 32th percentile compared to the long-term historical record at this gauge.

Is the Nb Chicago River at North Pulaski Road at Chicago, IL at flood stage?

No — the gage height is 7.14 feet below the NWS flood-stage threshold of 18.0 feet.

What is the historical median flow for the Nb Chicago River at North Pulaski Road at Chicago, IL on June 11?

The long-term median discharge for this date is 64 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 0 to unavailable cfs.

Where is the Nb Chicago River at North Pulaski Road at Chicago, IL stream gauge located?

The Nb Chicago River at North Pulaski Road at Chicago, IL stream gauge is operated by the USGS in Cook County, IL on the Nb Chicago River. USGS site number 05536085 (coordinates 41.9747, -87.7283).

Nb Chicago River at North Pulaski Road at Chicago, IL

USGS Site No: 05536085 • Nb Chicago River • Cook County, IL

Nb Chicago River at North Pulaski Road at Chicago, IL on the Nb Chicago River is currently at 32 cfs (Normal — 32th percentile for this date) . Gage height: 10.86 ft.

Reading from 1 week ago

Downstream on Nb Chicago River ↓

Nb Chicago River at Grand Avenue at Chicago, IL

CFS Discharge

10.86

Gage Height (ft)

Normal

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	0
25th	Low threshold	20
50th (Median)	Normal (median)	64	Today: 32 cfs
75th	High threshold	93
95th	Very High threshold	0

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	44	10.96
May 27, 2026	61	11.10
May 26, 2026	83	11.27
May 25, 2026	132	11.62
May 24, 2026	81	11.23
May 23, 2026	30	10.84
May 22, 2026	25	10.78
May 21, 2026	30	10.84
May 20, 2026	44	10.97
May 19, 2026	77	11.22
May 18, 2026	30	10.83
May 17, 2026	29	10.83
May 16, 2026	30	10.84
May 15, 2026	25	10.79
Apr 20, 2026	788	14.63
Apr 19, 2026	995	15.17
Apr 18, 2026	916	14.91
Apr 17, 2026	956	14.98
Apr 16, 2026	1,140	15.47
Apr 15, 2026	1,090	15.29
Apr 14, 2026	182	11.80
Apr 13, 2026	134	11.53
Apr 12, 2026	141	11.57
Apr 11, 2026	191	11.88
Apr 10, 2026	206	11.96
Apr 9, 2026	185	11.84
Apr 8, 2026	243	12.16
Apr 7, 2026	339	12.67
Apr 6, 2026	491	13.39
Apr 5, 2026	730	14.22

Station Information

USGS Site No: 05536085
State: IL
County: Cook County
Coordinates: 41.9747, -87.7283
Drainage Area: 112 mi²
Datum (ft): 575.4
HUC Code: 07120003

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 16.5 ft
Flood Stage: 18.0 ft
Moderate Flood: 20.0 ft
Major Flood: 21.0 ft

Currently 7.14 ft below flood stage.

Recent Extremes

Max discharge: 1,140 cfs

Apr 16, 2026
Min discharge: 13 cfs

Aug 10, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

North Branch Chicago River at Niles, IL
4.3 mi · 38 cfs

Normal
Nb Chicago River at Grand Avenue at Chicago, IL
7.2 mi · 425 cfs

Low
Chicago River at Columbus Drive at Chicago, IL
8.1 mi · 524 cfs

Very High
Des Plaines River at Algonquin Road at Des Plaines, IL
8.6 mi · 17 cfs

Low
Addison Creek at Bellwood, IL
9.7 mi · 4 cfs

Low