River gauges›Illinois
RIVER GAUGE · ROCK RIVER

Rock River at Byron

Ogle County, Illinois

Water level5.65 ft
Flow3,420 cfs
Last readingSep 16, 2026, 5:15 PM UTC (last recorded)
Action10.5 ft
Minor flood13 ft
Moderate flood14 ft
Major flood16 ft

The past week

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What floods at each level

Highest crests on record

DateLevelFlow
Apr 19, 197317.8 ft—
Apr 19, 201317.08 ft40,100 cfs
Mar 15, 201916.64 ft38,500 cfs

When the water runs low

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