How high is the Sangamon River at Riverton, IL right now?

The Sangamon River at Riverton, IL is currently flowing at 940 cubic feet per second with a gage height of 5.32 feet, based on the most recent USGS instantaneous reading.

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

Current flow is classified as normal for June 11. Today's discharge is at the 33th percentile compared to the long-term historical record at this gauge.

Is the Sangamon River at Riverton, IL at flood stage?

No — the gage height is 17.68 feet below the NWS flood-stage threshold of 23.0 feet.

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

The long-term median discharge for this date is 1,520 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 306 to 9,030 cfs.

Where is the Sangamon River at Riverton, IL stream gauge located?

The Sangamon River at Riverton, IL stream gauge is operated by the USGS in Sangamon County, IL on the Sangamon River. USGS site number 05576500 (coordinates 39.8431, -89.5475).

Sangamon River at Riverton, IL

USGS Site No: 05576500 • Sangamon River • Sangamon County, IL

Sangamon River at Riverton, IL on the Sangamon River is currently at 940 cfs (Normal — 33th percentile for this date) . Gage height: 5.32 ft.

Reading from 1 week ago

↑ Upstream on Sangamon River

Sangamon River at Route 48 at Decatur, IL

Downstream on Sangamon River ↓

Sangamon River at Petersburg, IL

940

CFS Discharge

5.32

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	306
25th	Low threshold	691
50th (Median)	Normal (median)	1,520	Today: 940 cfs
75th	High threshold	3,110
95th	Very High threshold	9,030

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	1,100	5.81
May 27, 2026	1,310	6.42
May 26, 2026	1,510	6.96
May 25, 2026	1,810	7.70
May 24, 2026	2,100	8.39
May 23, 2026	2,380	9.02
May 22, 2026	2,670	9.62
May 21, 2026	3,160	10.59
May 20, 2026	3,340	10.94
May 19, 2026	2,590	9.44
May 18, 2026	1,790	7.67
May 17, 2026	1,660	7.35
May 16, 2026	1,520	6.98
May 15, 2026	1,450	6.81
Apr 20, 2026	3,270	10.81
Apr 19, 2026	3,240	10.75
Apr 18, 2026	1,710	7.41
Apr 17, 2026	1,090	5.78
Apr 16, 2026	999	5.51
Apr 15, 2026	965	5.40
Apr 14, 2026	1,090	5.78
Apr 13, 2026	1,200	6.12
Apr 12, 2026	1,310	6.42
Apr 11, 2026	1,410	6.68
Apr 10, 2026	1,610	7.21
Apr 9, 2026	1,900	7.93
Apr 8, 2026	2,140	8.49
Apr 7, 2026	2,350	8.95
Apr 6, 2026	2,770	9.83
Apr 5, 2026	2,990	10.27

Station Information

USGS Site No: 05576500
State: IL
County: Sangamon County
Coordinates: 39.8431, -89.5475
Drainage Area: 2,618 mi²
Datum (ft): 508.0
HUC Code: 07130008

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 17.0 ft
Flood Stage: 23.0 ft
Moderate Flood: 26.0 ft
Major Flood: 29.0 ft

Currently 17.68 ft below flood stage.

Recent Extremes

Max discharge: 4,150 cfs

Jun 6, 2025
Min discharge: 53 cfs

Dec 11, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Sugar Creek Near Springfield, IL
5.0 mi · 98 cfs

Normal
South Fork Sangamon River Near Rochester, IL
7.1 mi · 421 cfs

Normal
Spring Creek at Springfield, IL
8.3 mi · 53 cfs

Normal
Lake Fork Near Cornland, IL
11.4 mi · 97 cfs

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

Low