RIVER GAUGE · KISHWAUKEE RIVER
Kishwaukee River at Marengo
McHenry County, Illinois
Water level7.17 ft
Flow46 cfs
Last readingSep 16, 2026, 4:15 PM UTC (last recorded)
Action11.5 ft
Minor flood12 ft
The past week
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What floods at each level
- 16 ft
Residences threatened along Woodbine Lane in Marengo.
- 14 ft
Marengo Water Treatment Facility property threatened. Deerpass Road threatened north of Marengo.
- 13.5 ft
IL-23 (State Street) threatened in Marengo.
- 12 ft
Boone-McHenry County Line Road is threatened.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Sep 17, 1972 | 13.31 ft | 7,350 cfs |
| Sep 3, 2018 | 13.06 ft | 3,330 cfs |
| Jul 2, 1978 | 12.83 ft | 2,360 cfs |
When the water runs low
- 7.0
Approximate stage of the 1-in-10 annual chance flow (7-day average).
- 6.0
River nears zero flow.
More on Kishwaukee River
DownstreamKishwaukee River at Belvidere
Get an alert when Kishwaukee River rises
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