RIVER GAUGE · BIG BROOK
Big Brook at Marlboro
Monmouth County, New Jersey
Water level9.51 ft
Flow—
Last readingSep 16, 2026, 4:20 PM UTC (last recorded)
Action17 ft980 cfs
The past week
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What floods at each level
- 17 ft
Water overtops banks and floods adjacent floodplain.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Sep 19, 1989 | 20.16 ft | -9,999 cfs |
| Aug 27, 2011 | 19.7 ft | — |
| Aug 5, 1990 | 19.24 ft | — |
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