Mahoning River Flow
As of 2026-09-04, the Mahoning River is flowing at a combined 5,690 cfs across 5 USGS streamgauges — 306% of normal for this time of year, versus a seasonal average of 1,862 cfs.
Total streamflow across the Mahoning River was last observed at 5,690 cfs, and is expected to yield approximately 11,286 acre-ft of water today; about 306% of normal. River levels are high. Average streamflow for this time of year is 1,862 cfs, with recent peaks last observed on 2022-02-18 when daily discharge volume was observed at 37,072 cfs.
Maximum discharge along the river is currently at the Mahoning River At Lowellville Oh reporting a streamflow rate of 2,360 cfs. However, the streamgauge with the highest stage along the river is the Mahoning River Below West Ave At Youngstown Oh with a gauge stage of 4.93 ft. This river is monitored from 5 different streamgauging stations along the Mahoning River, the highest being situated at an altitude of 951 ft, the Mahoning River Bl Berlin Dam Nr Berlin Center Oh.
River streamflow levels
Daily aggregate streamflow across every monitored gauge along the Mahoning River. Use the range buttons to zoom in on a specific period.
Total streamflow
Sum of all monitored streamgauges · daily
Every streamgauge along the Mahoning River
All 5 USGS gauges Snoflo tracks for this river, with current flow, stage, recent change, percent of normal, and the gauge's all-time min / max. Click any header to sort. Cells are heatmapped relative to the column min/max -- darker blue = higher.
| Streamgauge▾ | Streamflow (cfs)▾ | Gauge stage (ft)▾ | 24h Δ (%)▾ | % Normal▾ | Min (cfs)▾ | Max (cfs)▾ | Elevation (ft)▾ |
|---|---|---|---|---|---|---|---|
|
Mahoning River Bl Berlin Dam Nr Berlin Center Oh
OH
USGS 03090500
|
204 | 2.31 | 2.5 | 107% | 21 | 2,760 | 951 |
|
Mahoning River At Pricetown Oh
OH
USGS 03091500
|
274 | 2.77 | 1.1 | 136% | 11 | 2,790 | 907 |
|
Mahoning River At Leavittsburg Oh
OH
USGS 03094000
|
892 | 4.58 | 243.1 | 290% | 109 | 9,130 | 885 |
|
Mahoning River Below West Ave At Youngstown Oh
OH
USGS 03098600
|
1,960 | 4.93 | 425.5 | 429% | 191 | 14,400 | 826 |
|
Mahoning River At Lowellville Oh
OH
USGS 03099500
|
2,360 | 4.39 | 358.3 | 455% | 244 | 17,800 | 801 |
Maximum streamflow discharge by year
The single highest aggregate discharge recorded each year. Spotting the multi-year trend reveals droughts vs. wet cycles long before the headline daily flow does.
Annual peak discharge
From the river's full record · one point per water year
Streamflow elevation profile
Each bubble is one gauge along the river, plotted by current streamflow (x-axis) vs elevation (y-axis), sized by gauge stage. Reading top-to-bottom traces the river from headwaters down to its mouth -- you can see flow accumulate as elevation drops.
Elevation vs streamflow
One point per monitored gauge · bubble size = gauge stage
Mahoning River
The Mahoning River is a 113-mile-long river in Ohio, running through the cities of Youngstown, Warren, and Newton Falls. The river has a long history of pollution due to the steel and coal industries that once dominated the area. However, recent efforts have been made to clean up the river and improve water quality. The Mahoning River watershed includes several reservoirs, including the Berlin Lake Reservoir, which provides water for drinking and agriculture. Additionally, there are several dams along the river, including the Warren Dam and the B&O Railroad Dam. Despite its past pollution, the Mahoning River is now used for recreational activities, such as fishing and boating, and supports agricultural practices in the surrounding areas.
Recreation along the Mahoning River
Fishing access and paddle runs Snoflo tracks within the watershed.
Track the Mahoning River in the Snoflo app
Set per-gauge push alerts (e.g. "alert me when flow at the Russian R Nr Healdsburg crosses 5,000 cfs"), and Snoflo's iOS app pushes the moment USGS reports the crossing.
About the Mahoning River
How is the Mahoning River flowing right now?
As of 2026-09-04, the Mahoning River is flowing at a combined 5,690 cfs across its USGS streamgauges, about 306% of normal for this date. The live per-gauge breakdown and 24-hour trend are shown above.
Is the Mahoning River running high or low right now?
Check the percent-of-normal figure on this page: above 100% means the river is running higher than its seasonal average for the date, below 100% means lower. The per-gauge table shows which reaches are highest and lowest.
Where does the data for the Mahoning River come from?
Streamflow and gauge stage data are sourced from the U.S. Geological Survey (USGS) National Water Information System. The aggregate flow shown at the top of the page is computed by Snoflo as the sum of all monitored gauges along the river.
How is "percent of normal" calculated?
Today's aggregate streamflow is compared to the historical average aggregate streamflow on this calendar day across the river's full record. 100% means right on average; values above 100% indicate above-normal flow (wet year); values below indicate below-normal (dry year or drought).
Why are some gauges showing very different flows?
Gauges along a river measure flow at different points: headwater gauges read what's coming off the snowpack or mountain runoff; downstream gauges integrate everything upstream, including tributary inputs. Wide spreads usually mean a tributary is contributing significantly between gauges.
What's the elevation profile chart showing?
Each bubble is one gauge along the river, plotted by streamflow (x-axis) and elevation (y-axis), sized by gauge stage. Reading top-down traces the river from headwaters to mouth -- you can see flow build as elevation drops.
Can I get alerts when a specific gauge crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app on a per-gauge basis. Open any individual streamgauge from the table above and favorite it to set a discharge threshold.