Millstone River at Millstone NJ water level

Name: Millstone River at Millstone 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, Millstone River, New Jersey, United States

Directions

Below flood stage

Water level

1.49ft Down 0.09 ft over the last 24 hours

Measured Oct 18, 2026, 04:15 AM EDT (19 min ago)

History

7 days

Water level Minor flood stage

What this means

The Millstone River at Millstone NJ is at 1.49 ft, in the normal range.

It is 8.51 ft below the flood stage of 10.00 ft.

It has dropped 0.09 ft over the past 24 hours. In the last month it has stayed between 1.49 ft and 1.71 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: 22.45 ftSeptember 2, 2021

Floating and fishing near Millstone River at Millstone NJ

Normal flows mean predictable rapids and good access at most put-ins.

Flood stage here is 10.00 ft, 8.51 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

11.00 ft: The D and R canal is flooded by the Millstone River.
10.00 ft: River Road between Yorktown and Amsterdam is subject to closure. Canal Road near Suydam Road floods.
8.00 ft: Causeways are closed to due flooding.
1.49 ft: Right now

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

Highest crests on record

Rank	Level	Date
1	22.45 ft	September 2, 2021
2	22.30 ft	September 17, 1999
3	22.30 ft	August 28, 2011
4	20.10 ft	April 16, 2007
5	17.40 ft	March 14, 2010
6	16.88 ft	May 1, 2014
7	15.37 ft	December 19, 2023
8	14.70 ft	August 23, 2021
9	14.65 ft	January 10, 2024
10	13.90 ft	October 12, 2005

Weather at the gauge

The forecast is not available right now.

Sunrise 07:13 AM Sunset 06:15 PM Daylight 11 hr, 2 min First quarter 48%

Map

Other gauges on the Millstone River

Gauge	Level	Compared with normal	24 hours	Distance
Millstone River at Griggstown NJRiver gauge, Millstone River	4.06 ft	Below flood stage	−0.05 ft	4.6 mi
Millstone River at Blackwells Mills NJRiver gauge, Millstone River	2.14 ft	Below flood stage	−0.03 ft	2.0 mi
Millstone River at Weston NJRiver gauge, Millstone River	2.10 ft	Below flood stage	±0	1.9 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Royce Brook at Hamilton Road near Manville NJRiver gauge, Royce Brook	8.2 cfs	Normal	−1.7 cfs	1.9 mi
Raritan River at Manville NJRiver gauge, Raritan River	4.44 ft	Below flood stage	+0.06 ft	3.7 mi
Raritan River below Calco Dam at Bound Brook NJRiver gauge, Raritan River	17.60 ft	Below flood stage	+0.07 ft	3.9 mi
Pike Run at Belle Mead NJRiver gauge, Pike Run	2.1 cfs	Normal	−0.6 cfs	4.0 mi
Middle Brook at Bound Brook NJRiver gauge, Middle Brook	4.14 ft	Below flood stage	−0.04 ft	4.5 mi
North Branch Raritan River at South Branch NJRiver gauge, North Branch Raritan River	1.71 ft	Below flood stage	±0	6 mi
North Branch Raritan River near Raritan NJRiver gauge, North Branch Raritan River	2.91 ft	Below flood stage	−0.07 ft	7 mi

Questions and answers

What is flood stage for the Millstone River at Millstone NJ?

The official flood stage is 10.00 ft. The level is currently 8.51 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 Millstone River at Millstone NJ today?

On Oct 18, 2026, 04:15 AM EDT, the water level was 1.49 ft. Down 0.09 ft over the last 24 hours.

Is Millstone River at Millstone NJ rising or falling?

Down 0.09 ft over the last 24 hours.

Is the level of Millstone River at Millstone NJ normal?

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

What is the highest water level ever recorded at Millstone River at Millstone NJ?

The highest level on record is 22.45 ft on September 2, 2021.

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:01402500 (Agency page)
Coordinates: 40.50278, -74.58750 (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	1.49 ft	2026-10-18 08:15	Provisional

Download

Embed this gauge

Add a live card for this gauge to your website. It updates on its own and links back here.

<iframe src="https://nivelmap.com/embed/14878?lang=en" width="360" height="230" style="border:0;max-width:100%" loading="lazy" title="Millstone River at Millstone NJ water level"></iframe>

How to cite

U.S. Geological Survey: Millstone River at Millstone NJ (usgs:01402500). Accessed October 18, 2026 via Nivelmap, https://nivelmap.com/en/united-states/new-jersey/millstone-river-at-millstone-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