Mackinaw River near Green Valley water level

Name: Mackinaw River near Green Valley water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Mackinaw River, Illinois, United States

Directions

Normal for mid-October

Water level

13.85ft Steady over the last 24 hours

Measured Oct 18, 2026, 11:45 PM CDT (1 hour ago)

Flow: 104 cfs

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %)

What this means

The Mackinaw River near Green Valley is at 13.85 ft, in the normal range for mid-October.

That puts it 0.53 ft above the median of 13.32 ft for mid-October, based on 31 years of readings. A year ago it stood at 12.95 ft (+0.90 ft).

The level has held steady over the past 24 hours. In the last month it has stayed between 13.80 ft and 14.18 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Compared with 31 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 13.32 ft0.53 ft above the median for this date
Normal for this date: 12.97 ft – 15.00 ft8 years in 10 fall in this range (31 years of records)
Same day last year: 12.95 ft+0.90 ft
Lowest and highest in 30 days: 13.80 ft – 14.18 ft
Lowest and highest in 12 months: 12.91 ft – 25.51 ft
Highest on record: 29.18 ftDecember 31, 2015

Floating and fishing near Mackinaw River near Green Valley

Normal flows mean predictable rapids and good access at most put-ins.

Highest crests on record

Rank	Level	Date
1	29.18 ft	December 31, 2015
2	28.48 ft	April 20, 2013
3	28.44 ft	January 16, 2005
4	28.29 ft	September 16, 1993
5	28.19 ft	May 4, 2019
6	27.94 ft	September 17, 2008
7	27.65 ft	January 26, 2024
8	27.62 ft	May 14, 2002
9	27.14 ft	July 12, 2015
10	26.83 ft	May 26, 1995

Weather at the gauge

Rain in the last 3 days: 0.58 in. Rain that falls upstream can take hours or days to show up at a river gauge.

17 Sat 57° 35° – Wind 8 mph

18 Sun 65° 38° – Wind 13 mph

19 Mon 68° 38° – Wind 7 mph

20 Tue 70° 50° – Wind 7 mph

21 Wed 72° 51° – Wind 7 mph

22 Thu 74° 55° – Wind 7 mph

23 Fri 76° 55° – Wind 10 mph

Forecast: Open-Meteo

Sunrise 07:14 AM Sunset 06:14 PM Daylight 11 hr First quarter 56%

Map

Other gauges on the Mackinaw River

Gauge	Level	Compared with normal	24 hours	Distance
Mackinaw River near HudsonRiver gauge, Mackinaw River	12.76 ft	No reference yet	±0	32 mi
Mackinaw River near CongervilleRiver gauge, Mackinaw River	1.15 ft	Normal	−0.02 ft	22 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Illinois River at Kingston MinesRiver gauge, Illinois River	5.40 ft	Normal	−0.54 ft	11 mi
Illinois River at Copperas CreekRiver gauge, Illinois River	5.02 ft	Normal	−0.44 ft	15 mi
Farm Creek at FarmdaleRiver gauge, Farm Creek	0.65 ft	Very low	−0.01 ft	16 mi
Fondulac Creek near East PeoriaRiver gauge, Fondulac Creek	1.37 ft	Very low	±0	16 mi
Mason Tazewell Drainage D at Cr2350e near TopekaRiver gauge, Mason Tazewell Drainage D	15.42 ft	Very high	−0.01 ft	18 mi
Salt Creek near GreenviewRiver gauge, Salt Creek	1.35 ft	Normal	−0.05 ft	23 mi
Kickapoo Creek at WaynesvilleRiver gauge, Kickapoo Creek	2.48 ft	Normal	−0.03 ft	29 mi
Sangamon River near OakfordRiver gauge, Sangamon River	3.45 ft	Normal	−0.02 ft	30 mi

Questions and answers

How does the Mackinaw River near Green Valley compare with last year?

It is 0.90 ft higher than on the same day last year, when the reading was 12.95 ft.

What is a normal level for the Mackinaw River near Green Valley in mid-October?

The median for mid-October is 13.32 ft. In 8 years out of 10 the reading falls between 12.97 ft and 15.00 ft, based on 31 years of records.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Mackinaw River near Green Valley today?

On Oct 18, 2026, 11:45 PM CDT, the water level was 13.85 ft. Steady over the last 24 hours.

Is Mackinaw River near Green Valley rising or falling?

Steady over the last 24 hours. Down 0.04 ft over the last 7 days.

Is the level of Mackinaw River near Green Valley normal?

Normal for mid-October. Compared with 31 years of daily readings for this time of year.

What is the highest water level ever recorded at Mackinaw River near Green Valley?

The highest level on record is 29.18 ft on December 31, 2015.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:05568000 (Agency page)
Coordinates: 40.45467, -89.60617 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	13.85 ft	2026-10-19 04:45	Provisional
Flow	104 cfs	2026-10-19 04:45	Provisional

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How to cite

U.S. Geological Survey: Mackinaw River near Green Valley (usgs:05568000). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/illinois/mackinaw-river-near-green-valley

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer