How high is the South Fork Sangamon River Near Rochester, IL right now?

The South Fork Sangamon River Near Rochester, IL is currently flowing at 421 cubic feet per second with a gage height of 9.14 feet, based on the most recent USGS instantaneous reading.

Is the flow on the South Fork Sangamon River Near Rochester, IL normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 45th percentile compared to the long-term historical record at this gauge.

What is the historical median flow for the South Fork Sangamon River Near Rochester, IL on June 11?

The long-term median discharge for this date is 486 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 69 to 2,530 cfs.

Where is the South Fork Sangamon River Near Rochester, IL stream gauge located?

The South Fork Sangamon River Near Rochester, IL stream gauge is operated by the USGS in Sangamon County, IL on the South Fork Sangamon River. USGS site number 05576000 (coordinates 39.7422, -89.5673).

South Fork Sangamon River Near Rochester, IL

USGS Site No: 05576000 • South Fork Sangamon River • Sangamon County, IL

South Fork Sangamon River Near Rochester, IL on the South Fork Sangamon River is currently at 421 cfs (Normal — 45th percentile for this date) . Gage height: 9.14 ft.

Reading from 1 week ago

421

CFS Discharge

9.14

Gage Height (ft)

Normal

Flow Condition

N/A

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	69
25th	Low threshold	189
50th (Median)	Normal (median)	486	Today: 421 cfs
75th	High threshold	1,130
95th	Very High threshold	2,530

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	450	9.34
May 27, 2026	498	9.67
May 26, 2026	625	10.48
May 25, 2026	903	12.13
May 24, 2026	1,130	13.28
May 23, 2026	1,290	14.02
May 22, 2026	1,400	14.47
May 21, 2026	1,510	14.94
May 20, 2026	1,580	15.24
May 19, 2026	1,350	14.25
May 18, 2026	812	11.64
May 17, 2026	744	11.25
May 16, 2026	708	11.03
Apr 20, 2026	1,110	13.47
Apr 19, 2026	1,060	13.19
Apr 18, 2026	497	9.96
Apr 17, 2026	264	8.21
Apr 16, 2026	265	8.22
Apr 15, 2026	274	8.30
Apr 14, 2026	290	8.44
Apr 13, 2026	306	8.58
Apr 12, 2026	343	8.89
Apr 11, 2026	403	9.37
Apr 10, 2026	483	9.96
Apr 9, 2026	574	10.57
Apr 8, 2026	652	11.05
Apr 7, 2026	726	11.49
Apr 6, 2026	843	12.13
Apr 5, 2026	867	12.26
Apr 4, 2026	797	11.89

Station Information

USGS Site No: 05576000
State: IL
County: Sangamon County
Coordinates: 39.7422, -89.5673
Drainage Area: 867 mi²
Datum (ft): 510.9
HUC Code: 07130007

View on USGS NWIS →

Recent Extremes

Max discharge: 1,580 cfs

May 20, 2026
Min discharge: 1 cfs

Oct 27, 2025

Computed from the local daily-values archive.

Nearby Gauges

Sugar Creek Near Springfield, IL
2.9 mi · 98 cfs

Normal
Sangamon River at Riverton, IL
7.1 mi · 940 cfs

Normal
Sugar Creek Near Chatham, IL
7.5 mi · 9 cfs

Low
Spring Creek at Springfield, IL
8.6 mi · 53 cfs

Normal
Sugar Creek at Covered Bridge Road near Chatham, IL
8.7 mi · 24 cfs

Normal