Patapsco River Flow Today
As of October 2, 2026 at 3:15 AM, the Patapsco River is flowing at 43 cfs at Hollofield, MD — 71% of normal for the date and down 7% in 24 hours. ❤ Favorite
Patapsco River map
See the Patapsco River on a live map
Every gauge, dam and paddle run on the river, one tap each:
- Gauges now — which reaches are high or low
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Patapsco River conditions today
Where the river is running versus normal, what’s rising or dropping, and what it means for a trip — built from the live USGS readings below.
At Hollofield, the Patapsco River is running 43 cfs — 71% of normal, down 7% since yesterday. Along the river, 1 of 1 reporting gauges are below normal (the typical gauge is at 71% of normal).
How the Patapsco River compares to normal
Every reporting gauge from the top of the river to the bottom: bar length is today’s flow, colour is percent of normal for the date.
Flow along the river, upstream to downstream
- Hollofield190 ft 43 cfs71%
Bar length uses a square-root scale so small headwater flows stay visible next to big downstream ones. Colour: <50% 50–90 90–110 110–150 150%+ of normal.
Where every gauge sits
One dot per Patapsco River streamgauge, placed by its own percent of normal. The line is the typical gauge (71%).
Patapsco River flow report
| Streamgage | Streamflow | % of normal | 24h | Gage height | To flood stage | Elevation |
|---|---|---|---|---|---|---|
|
Patapsco River At Hollofield MD
Oct 2, 3:15 AM · USGS 01589000 |
43 cfs | 71% | -7% | 1.62 ft | 9.4 ft below | 190 ft |
USGS provisional data. Readings are in each gauge’s local time; gauges silent for more than 3 days are marked “Last reported”. Tap any gauge for its hydrograph, forecast and history.
Dams & reservoirs on the Patapsco River
Releases from these dams shape the flow downstream. Tap one for its daily level and history.
Patapsco River streamflow over time
Daily total flow across every monitored gauge on the river (this total last updated earlier; the live gauge readings above are current).
Patapsco River
The Patapsco River is a major tributary of the Chesapeake Bay in Maryland, USA. It has a total length of 39 miles and originates from the west of Ellicott City, Maryland. The river played an important role in the industrial revolution and was home to numerous mills and factories. In the present day, the Patapsco River is a popular destination for recreational activities like fishing, kayaking, and hiking. The river has several reservoirs and dams, including the Liberty Reservoir, which provides drinking water for Baltimore City. The Patapsco River is also used for agricultural purposes like irrigation and livestock watering. Despite its historical significance, the river has faced pollution and restoration efforts have been made to improve water quality.
Fishing near the Patapsco River
About the Patapsco River
How is the Patapsco River flowing right now?
As of October 2, 2026, the Patapsco River is flowing at 43 cfs at Hollofield, MD, about 71% of normal for the date. Every gauge’s live reading is in the table above.
Is the Patapsco River running high or low?
The typical gauge on the Patapsco River is at 71% of normal for the date. Above 100% means higher than the historical average for this calendar day; below 100% means lower. The profile above shows which reaches are high or low.
What is flood stage on the Patapsco River?
The National Weather Service sets flood stages for Hollofield (11.0 ft). The table shows how far each gauge is below its flood stage right now.
Where does the data come from?
Discharge and gage height are from the USGS National Water Information System; flood stages from the National Weather Service. The history chart sums every monitored gauge on the river.
Can I get alerts for a gauge?
Yes — open any gauge from the table, favorite it in the Snoflo app and set a flow threshold.