Millstone River at Millstone NJ

Somerset County, New Jersey · USGS gauge 01402500 · NWS MITN4 · Millstone River flood status · New Jersey river levels

Nearby: river levels near Manville · river levels near Princeton

Is Millstone River at Millstone NJ flooding right now?

Millstone River at Millstone NJ measured 0.86 ft on 2026-09-11 01:15:00 UTC. That observation was 9.1 ft below its 10 ft flood stage. This is the latest available reading, not a guarantee of current conditions.

Gauge height
0.86 ft
as of 70 min ago
Streamflow
data refreshed 7 min ago

Minor flooding here begins at 10 ft, with major flooding at 16 ft. The highest crest on record was 22.45 ft on Thu, Sep 2, 2021.

Flood stages at this gauge

CategoryStageCurrent distance
Action8 ft7.1 ft below
Minor flood10 ft9.1 ft below
Moderate flood11 ft10.1 ft below
Major flood16 ft15.1 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

StageDate
22.45 ft2021-09-02
22.3 ft2011-08-28
22.3 ft1999-09-17
20.1 ft2007-04-16
17.4 ft2010-03-14

Nearby gauges

GaugeDistanceCounty
Millstone River at Weston NJ1.9 miSomerset County
Royce Brook at Hamilton Road near Manville NJ1.9 miSomerset County
Millstone River at Blackwells Mills NJ2.0 miSomerset County
Royce Brook tributary near Belle Mead NJ3.3 miSomerset County
Raritan River at Manville NJ3.7 miSomerset 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