Major Flood
25 ft
Current Water Level
Gage Height
Loading...
Streamflow
Loading...
Last Reading
Loading...
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
23 ft
Minor Flood
20 ft
Action Stage
17 ft
What Floods at Each Level
25 ft
The Delaware River meets the Delaware Canal, backfilling the Rivermawr and Flats neighborhoods making all roads east of the canal impassable.
24.5 ft
Carr's Lane in Yardley begins to flood.
23 ft
North and South Bell Avenues in Yardley begin to flood.
22 ft
Route 32 in Yardley is flooded in both directions. Up to two feet of water covers portions of Morgan Avenue, Brown Street, Maple Avenue, and Fuld Avenue.
21.5 ft
Ferry Street in Yardley begins to flood.
20 ft
Houses on Brown Street in Yardley begin to take on water. Houses on Afton Avenue also take on water. Southbound lanes are closed along stretches of Route 29 in Trenton. Route 32 North is closed in Yardley borough. River Road (Route 32), north of Woodside Road and south of Mt. Eyre Road, in Lower Makefield Township, begins to flood.
19.5 ft
Morgan Avenue in Yardley Borough begins to flood. River Road (PA Rt 32) at East Ferry Road in Lower Makefield Township begins to flood.
18.5 ft
PA Route 32 South at East College Avenue in Yardley borough begins to flood. Water begins to enter Level 1 of the parking garage at the State Capital Building. Sections of Stacey Park in Trenton are closed.
18 ft
PA Route 32 North is closed between Brown Street and Maple Avenue.
17 ft
PA Route 32 North in Yardley Borough begins to flood between Brown Street and Maple Avenue.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
Loading chart data...
Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Mar 7, 1904 | 30.6 ft | — |
| Aug 19, 1955 | 28.6000003814697 ft | 329,000 cfs |
| Oct 10, 1903 | 28.5 ft | 295,000 cfs |
Flood Inundation Map
NOAA has mapped what areas flood at different water levels for this gauge. View the interactive flood inundation map →
About This Gauge
Get Flood Alerts for Delaware River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Delaware River at Trenton?
The Delaware River at Trenton gauge is maintained by USGS (site 01463500) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Delaware River at Trenton?
The NWS-defined flood stage for Delaware River at Trenton is 20 feet. Action stage begins at 17 feet. Moderate flooding starts at 23 feet, and major flooding at 25 feet.
How do I get alerts when Delaware River rises?
Download StormCast free on Google Play, go to River Gauges, and add Delaware River at Trenton to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Delaware River at Trenton gauge located?
The gauge is located in Mercer County, New Jersey at coordinates 40.2217°N, 74.7781°W. USGS site number: 01463500. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Delaware River
On This River
Upstream: Delaware River at Washington Crossing
Downstream: Delaware River at Newbold Island (IN MLLW)
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey