How high is the Sangamon River at Route 48 at Decatur, IL right now?

The Sangamon River at Route 48 at Decatur, IL is currently flowing at 176 cubic feet per second with a gage height of 3.26 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Sangamon River at Route 48 at Decatur, IL normal for this time of year?

Current flow is classified as low for June 11. Today's discharge is at the 20th percentile compared to the long-term historical record at this gauge.

What is the historical median flow for the Sangamon River at Route 48 at Decatur, IL on June 11?

The long-term median discharge for this date is 660 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 51 to 2,680 cfs.

Where is the Sangamon River at Route 48 at Decatur, IL stream gauge located?

The Sangamon River at Route 48 at Decatur, IL stream gauge is operated by the USGS in Macon County, IL on the Sangamon River. USGS site number 05573540 (coordinates 39.8311, -88.9764).

Sangamon River at Route 48 at Decatur, IL

USGS Site No: 05573540 • Sangamon River • Macon County, IL

Sangamon River at Route 48 at Decatur, IL on the Sangamon River is currently at 176 cfs (Low — 20th percentile for this date) . Gage height: 3.26 ft.

Reading from 1 week ago

↑ Upstream on Sangamon River

Sangamon River at Monticello, IL

Downstream on Sangamon River ↓

Sangamon River at Riverton, IL

176

CFS Discharge

3.26

Gage Height (ft)

Low

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	51
25th	Low threshold	240	Today: 176 cfs
50th (Median)	Normal (median)	660
75th	High threshold	1,390
95th	Very High threshold	2,680

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	40	2.55
May 27, 2026	1	2.02
May 26, 2026	91	2.81
May 25, 2026	208	3.44
May 24, 2026	223	3.52
May 23, 2026	226	3.54
May 22, 2026	309	3.94
May 21, 2026	466	4.63
May 20, 2026	597	5.13
May 19, 2026	638	5.28
May 18, 2026	418	4.40
May 17, 2026	272	3.77
May 16, 2026	249	3.65
May 15, 2026	226	3.54
Apr 20, 2026	999	6.56
Apr 19, 2026	1,090	6.87
Apr 18, 2026	1,020	6.62
Apr 17, 2026	324	3.95
Apr 16, 2026	273	3.73
Apr 15, 2026	188	3.28
Apr 14, 2026	102	2.88
Apr 13, 2026	167	3.19
Apr 12, 2026	259	3.66
Apr 11, 2026	324	3.98
Apr 10, 2026	315	3.94
Apr 9, 2026	346	4.07
Apr 8, 2026	511	4.78
Apr 7, 2026	663	5.37
Apr 6, 2026	655	5.34
Apr 5, 2026	860	6.07

Station Information

USGS Site No: 05573540
State: IL
County: Macon County
Coordinates: 39.8311, -88.9764
Drainage Area: 938 mi²
Datum (ft): 583.2
HUC Code: 07130006

View on USGS NWIS →

Recent Extremes

Max discharge: 1,710 cfs

Jul 20, 2025
Min discharge: 1 cfs

Nov 17, 2025

Computed from the local daily-values archive.

Nearby Gauges

West Okaw River Near Lovington, IL
18.1 mi · 49 cfs

Normal
Salt Creek Near Rowell, IL
20.0 mi · 61 cfs

Low
Lake Fork Near Cornland, IL
23.2 mi · 97 cfs

Normal
Sangamon River at Monticello, IL
24.7 mi · 137 cfs

Normal
Lake Fork at Atwood, IL
26.6 mi · 91 cfs

Normal