Big Brook near Marlboro NJ

Monmouth County, New Jersey · USGS gauge 01407290 · NWS BBMN4 · New Jersey river levels

Is Big Brook near Marlboro NJ flooding right now?

Big Brook near Marlboro NJ measured 9.49 ft on 2026-09-11 01:20:00 UTC. No NWS minor flood stage is published for this gauge. Its action level is 17 ft; action level is not flood stage.

Gauge height

9.49 ft

as of 50 min ago

Streamflow

3 cfs

data refreshed 8 min ago

The highest crest on record was 20.16 ft on Wed, Sep 20, 1989.

Streamflow outlook

NOAA National Water Model forecast, issued 14 hours ago. The NWM models discharge for every river reach in the country, including the many gauges the National Weather Service does not forecast individually. It is a model, not an official NWS river forecast, and it predicts flow rather than water level.

Flood stages at this gauge

Category	Stage	Current distance
Action	17 ft	7.5 ft below

New to these numbers? What does flood stage mean? · How to read a river gauge · Why is the river rising?

Highest crests on record

Stage	Date
20.16 ft	1989-09-20
19.7 ft	2011-08-28
19.24 ft	1990-08-06
19.14 ft	1991-03-04
18.91 ft	2021-09-01

Nearby gauges

Gauge	Distance	County
Swimming River near Red Bank NJ	5.2 mi	Monmouth County
Deep Run at Old Bridge NJ	9.7 mi	Middlesex County
South River at Old Bridge NJ	10.1 mi	Middlesex County
Manalapan Brook at Spotswood NJ	10.5 mi	Middlesex County
Jumping Brook near Neptune City NJ	11.2 mi	Monmouth County

Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.

Sources: USGS monitoring location · NWS gauge & forecast