River gauges›Ohio
RIVER GAUGE · ST. MARYS RIVER

St. Marys River at Rockford

Mercer County, Ohio

Water level2.76 ft
Flow117 cfs
Last readingSep 16, 2026, 4:40 PM UTC (last recorded)
Action10 ft
Minor flood13 ft5,218 cfs
Moderate flood15 ft9,742 cfs
Major flood18 ft

The past week

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What floods at each level

Highest crests on record

DateLevelFlow
Jun 17, 201514.68 ft8,633 cfs
Feb 8, 200814.56 ft—
Mar 2, 201114.25 ft8,153 cfs

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