Manalapan Brook at Spotswood NJ water level

Name: Manalapan Brook at Spotswood NJ water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Manalapan Brook, New Jersey, United States

Directions

Below flood stage

Water level

10.19ft Down 0.06 ft over the last 24 hours

Measured Oct 20, 2026, 02:15 AM EDT (53 min ago)

Flow: 41.5 cfs

History

7 days

Water level Minor flood stage

What this means

Water levels are unremarkable at Manalapan Brook at Spotswood NJ, where the gauge shows 10.19 ft.

It is 8.81 ft below the flood stage of 19.00 ft.

It is still going down, by 0.06 ft over the past 24 hours. The 30-day range is 10.19 ft – 10.39 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Judged against the official flood stage for this gauge. How to read levels

Key numbers

Highest on record: 22.22 ftAugust 28, 2011

Paddling and fishing conditions

Most paddlers and anglers will find the river in good shape at this stage.

For reference, flood stage is 19.00 ft.

What happens at each level

22.00 ft: The Immaculate Conception parking lot takes on water. Flooding increases on both Devoe and Mundy Avenues. Residential and township properties take on water. Downstream tides can affect Lake Devoe levels and subsequent flooding.
21.00 ft: Mundy Avenue flooding increases. Devoe Avenue floods. Both roads become impassable. Flood waters approach residential and township properties. Downstream tides can affect Lake Devoe levels and subsequent flooding.
19.00 ft: Mundy Avenue, connecting Spotswood and Old Bridge, is subject to flooding and closure. Downstream tides can affect Lake Devoe levels and subsequent flooding.
10.19 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Rank	Level	Date
1	22.22 ft	August 28, 2011
2	20.42 ft	July 18, 2005
3	20.31 ft	May 1, 2014
4	20.08 ft	April 16, 2007
5	19.97 ft	September 20, 1989
6	19.90 ft	May 30, 1968
7	19.87 ft	March 14, 2010
8	19.80 ft	August 28, 1971
9	19.62 ft	May 31, 1984
10	19.46 ft	May 28, 2018

Weather at the gauge

The forecast is not available right now.

Sunrise 07:14 AM Sunset 06:12 PM Daylight 10 hr, 57 min First quarter 66%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Deep Run at Old Bridge NJRiver gauge, Deep Run	9.8 cfs	Normal	−1.5 cfs	2.8 mi
Lawrence Brook at Westons Mills NJRiver gauge, Lawrence Brook	15.82 ft	Below flood stage	±0	7 mi
Big Brook near Marlboro NJRiver gauge, Big Brook	7.6 cfs	Normal	+0.7 cfs	10 mi
Millstone River at Blackwells Mills NJRiver gauge, Millstone River	2.02 ft	Below flood stage	−0.05 ft	11 mi
Millstone River at Griggstown NJRiver gauge, Millstone River	3.77 ft	Below flood stage	−0.11 ft	12 mi
Millstone River at Millstone NJRiver gauge, Millstone River	1.23 ft	Below flood stage	−0.12 ft	13 mi
Raritan River below Calco Dam at Bound Brook NJRiver gauge, Raritan River	17.30 ft	Below flood stage	−0.08 ft	14 mi
Millstone River at Weston NJRiver gauge, Millstone River	1.86 ft	Below flood stage	−0.07 ft	14 mi

Questions and answers

What is flood stage for Manalapan Brook at Spotswood NJ?

The official flood stage is 19.00 ft. The level is currently 8.81 ft below it.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Manalapan Brook at Spotswood NJ today?

On Oct 20, 2026, 02:15 AM EDT, the water level was 10.19 ft. Down 0.06 ft over the last 24 hours.

Is Manalapan Brook at Spotswood NJ rising or falling?

Down 0.06 ft over the last 24 hours.

Is the level of Manalapan Brook at Spotswood NJ normal?

Below flood stage. Judged against the official flood stage for this gauge.

What is the highest water level ever recorded at Manalapan Brook at Spotswood NJ?

The highest level on record is 22.22 ft on August 28, 2011.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:01405400 (Agency page)
Coordinates: 40.38944, -74.39056 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	10.19 ft	2026-10-20 06:15	Provisional
Flow	41.5 cfs	2026-10-20 06:15	Provisional

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How to cite

U.S. Geological Survey: Manalapan Brook at Spotswood NJ (usgs:01405400). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/new-jersey/manalapan-brook-at-spotswood-nj

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer