Susquehanna River at Conowingo water level

Name: Susquehanna River at Conowingo 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, Susquehanna River, Maryland, United States

Directions

Below flood stage

Water level

12.42ft Steady over the last 24 hours

Measured Oct 19, 2026, 02:35 PM EDT (58 min ago)

Flow: 25,900 cfs

History

7 days

Water level Minor flood stage

What this means

The Susquehanna River at Conowingo is at 12.42 ft, in the normal range.

It is 11.08 ft below the flood stage of 23.50 ft.

It has barely moved over the past 24 hours. In the last month it has stayed between 9.62 ft and 14.23 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: 36.83 ftJune 24, 1972

Floating and fishing near Susquehanna River at Conowingo

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

Flood stage here is 23.50 ft, 11.08 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

31.00 ft: Notification level 9 with 43 to 53 gates open at Conowingo dam.
29.40 ft: Notification level 8 with 36 to 42 gates open at Conowingo Dam.
28.50 ft: Notification level 7 with 33 to 35 gates open at Conowingo Dam.
26.30 ft: Notification level 6 with 26 to 32 gates open at Conowingo Dam.
24.80 ft: Backyards and basements on Main Street and Tome's Landing begin to flood.
23.70 ft: Minor flooding begins in the town of Port Deposit, Maryland.
22.90 ft: Maryland Route 222 north of Port Deposit is closed.
21.50 ft: Notification level 2 with 12 to 15 gates open at Conowingo Dam.
20.00 ft: Notification level 1 with 10 to 11 gates open at Conowingo Dam.
12.42 ft: Right now

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

Highest crests on record

Rank	Level	Date
1	36.83 ft	June 24, 1972
2	34.18 ft	January 20, 1996
3	32.41 ft	September 9, 2011
4	30.92 ft	September 27, 1975
5	30.07 ft	September 19, 2004
6	28.08 ft	February 16, 1984
7	28.06 ft	April 2, 1993
8	28.04 ft	March 7, 1979
9	27.31 ft	June 29, 2006
10	26.70 ft	April 4, 2005

Weather at the gauge

The forecast is not available right now.

Sunrise 07:19 AM Sunset 06:21 PM Daylight 11 hr, 2 min First quarter 61%

Map

Other gauges on the Susquehanna River

Gauge	Level	Compared with normal	24 hours	Distance
Susquehanna River at TowandaRiver gauge, Susquehanna River	0.86 ft	Below flood stage	±0	146 mi
Susquehanna River at MeshoppenRiver gauge, Susquehanna River	8.39 ft	Below flood stage	+0.06 ft	135 mi
Susquehanna River at Wilkes-BarreRiver gauge, Susquehanna River	1.58 ft	Below flood stage	−0.03 ft	111 mi
Susquehanna River at BloomsburgRiver gauge, Susquehanna River	2.01 ft	Below flood stage	−0.13 ft	93 mi
Susquehanna River at DanvilleRiver gauge, Susquehanna River	3.53 ft	Below flood stage	−0.10 ft	93 mi
Susquehanna River above Dam at SunburyRiver gauge, Susquehanna River	3.07 ft	Normal	−0.05 ft	89 mi
Susquehanna River at SunburyRiver gauge, Susquehanna River	7.66 ft	Normal	−0.05 ft	88 mi
Susquehanna River at HarrisburgRiver gauge, Susquehanna River	3.97 ft	Below flood stage	−0.09 ft	56 mi
Susquehanna River at MariettaRiver gauge, Susquehanna River	34.95 ft	Below flood stage	+0.08 ft	33 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Deer Creek near DarlingtonRiver gauge, Deer Creek	1.30 ft	Below flood stage	−0.08 ft	2.9 mi
Octoraro Creek near RichardsmereRiver gauge, Octoraro Creek	109 cfs	Normal	−7.0 cfs	4.6 mi
Ches Bay at Mouth of Susq R at Havre de GraceTidal gauge, Ches Bay	0.85 ft	Below flood stage	+0.13 ft	9 mi
Swan Creek at Swan CreekRiver gauge, Swan Creek	2.99 ft	Below flood stage	−0.04 ft	10 mi
Muddy Creek at Castle FinRiver gauge, Muddy Creek	69.9 cfs	Normal	−3.5 cfs	11 mi
Bynum Run at Bel AirRiver gauge, Bynum Run	0.67 ft	Below flood stage	−0.01 ft	12 mi
James Run near BelcampRiver gauge, James Run	3.00 ft	Below flood stage	−0.06 ft	12 mi
Deer Creek at RocksRiver gauge, Deer Creek	2.05 ft	Below flood stage	−0.01 ft	12 mi

Questions and answers

What is flood stage for the Susquehanna River at Conowingo?

The official flood stage is 23.50 ft. The level is currently 11.08 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 Susquehanna River at Conowingo today?

On Oct 19, 2026, 02:35 PM EDT, the water level was 12.42 ft. Steady over the last 24 hours.

Is Susquehanna River at Conowingo rising or falling?

Steady over the last 24 hours.

Is the level of Susquehanna River at Conowingo normal?

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

What is the highest water level ever recorded at Susquehanna River at Conowingo?

The highest level on record is 36.83 ft on June 24, 1972.

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:01578310 (Agency page)
Coordinates: 39.65789, -76.17444 (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	12.42 ft	2026-10-19 18:35	Provisional
Flow	25,900 cfs	2026-10-19 18:35	Provisional

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How to cite

U.S. Geological Survey: Susquehanna River at Conowingo (usgs:01578310). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/maryland/susquehanna-river-at-conowingo

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