Delaware River at Delaware City (IN MLLW)
Delaware — Water Level & Flood Stage
Located in New Castle County, Delaware on the Delaware River. Live water level data from USGS, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: DELD1). Live data may be limited. View on NWS AHPS →
Flood Stages
Major Flood
9.5 ft
Moderate Flood
8.5 ft
Minor Flood
7.5 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
9.73 ft
(Mean Lower Low Water (MLLW)) The level reached on October 30, 2012 during Post Tropical Cyclone Sandy.
9.54 ft
(MLLW) The level reached on October 29, 2021.
9.5 ft
(MLLW) MAJOR FLOODING. At this level, widespread roadway flooding begins near the bay, the river and the tidal tributaries in New Castle County DE and Salem County NJ. Vulnerable homes and businesses may be damaged as water levels rise further above this threshold. Numerous roads become impassable and some neighborhoods may be isolated. The flood waters become a danger to anyone who attempts to cross on foot or in a vehicle.
8.5 ft
(MLLW) MODERATE FLOODING. At this level, additional roadways near the bay, the river and the tidal tributaries in New Castle County DE and Salem County NJ begin to flood. Lives may be at risk when people put themselves in harm's way. Some damage to vulnerable structures may begin to occur. COASTAL FLOOD WARNING LEVEL.
8.1 ft
(MLLW) Flooding begins along East 12th Street and along the south bank of the Christina River in Wilmington DE. Flooding begins where the Red Clay Creek, the White Clay Creek and the Christina River meet. The area is to the west and northwest of the New Castle Airport and it includes the communities of Christiana, Glenville and Stanton DE. Flooding begins along the Appoquinimink River in Odessa DE. Flooding begins along NJ Route 49, Quinton-Alloway Road and Sickler Street in Quinton Township NJ.
7.9 ft
(MLLW) Flooding begins along Oldmans Creek at US Route 130 and near Pedricktown NJ. Flooding begins in Penns Grove and Carneys Point NJ. Flooding begins along Riviera Drive and Hook Road in Pennsville Township. Flooding begins along Pointers-Auburn Road in Mannington Township NJ. Flooding begins along NJ Route 45 at the Salem River. Flooding begins along Sinnicksons Landing Rd and South Locust Avenue in Elsinboro Township NJ. Flooding begins along Beasley Neck Road in Lower Alloways Township NJ.
7.8 ft
(MLLW) COASTAL FLOOD ADVISORY LEVEL.
7.7 ft
(MLLW) Flooding begins in New Castle DE along the Strand and in the Dobbinsville section. Flooding begins along the section of DE Route 9 to the south of New Castle DE and around the approaches to the DE Route 9 bridge over the Red Lion Creek. Flooding begins in Delaware City DE including the area around the 5th Street bridge. Flooding begins in Port Penn, Augustine Beach and Bay View Beach DE. Flooding begins around the approaches to the DE Route 9 bridge over the Appoquinimink River.
7.5 ft
(MLLW) MINOR FLOODING.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Oct 29, 2012 | 9.73 ft | — |
| Oct 29, 2012 | 9.73 ft | — |
| Oct 28, 2021 | 9.54 ft | — |
| Oct 28, 2021 | 9.54 ft | — |
| Dec 20, 2012 | 9.47 ft | -9,999 cfs |
About This Gauge
NWS LID
DELD1
River
Delaware River
County
New Castle, DE
Coordinates
39.5817°N, 75.5883°W
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 Delaware City (IN MLLW)?
The Delaware River at Delaware City (IN MLLW) gauge is maintained by USGS 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 Delaware City (IN MLLW)?
The NWS-defined flood stage for Delaware River at Delaware City (IN MLLW) is 7.5 feet. Action stage begins at N/A feet. Moderate flooding starts at 8.5 feet, and major flooding at 9.5 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 Delaware City (IN MLLW) to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the Delaware River at Delaware City (IN MLLW) gauge located?
The gauge is located in New Castle County, Delaware at coordinates 39.5817°N, 75.5883°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
On This River
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Source & Notes
Data provided by: National Ocean Service
- <style type="text/css"> .style1 {background-color: #FFFF00;}</style>Please refer to our <style type="text/css"> .style1 { background-color: #FFFF00;} .style2 {background-color: #FFFF00;} </style> <a href="http://forecast.weather.gov/product.php?site=NWS&issuedby=PHI&product=CFW&format=CI&version=1&glossary=0"> <span class="style1">Coastal Hazard Message</span></a> for specific information regarding Coastal Flood Watches, Warnings and Advisories. During tropical cyclones, please refer<a href="https://forecast.weather.gov/product.php?site=NWS&issuedby=PHI&product=TCV&format=CI&version=1&glossary=1"> <span class="style2">here</span></a> for additional storm surge information.
- Flood impacts are based on long-term averages. Actual impacts from any tidal flooding event may vary due to factors such as rainfall, wave action, and the number of tide cycles during which there is an onshore flow.