Potomac River Near Wash, Dc Little Falls Pump Sta Realtime Data
Until 2026-07-17T00:55:33+00:00 • National Weather Service
Monitoring message only. Please disregard.
POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA
Realtime Data • Report • Conditions
3,800
Discharge (cfs)
3.1
Gauge Height (ft)
Streamflow discharge was last observed at 3,630 cfs, and a gauge height of 3.14 feet.
With the
% decrease since yesterday,
the streamflow average over the past 10 days is 4,173 .
Weather today, Tomorrow,
This river is a major source of freshwater for the Chesapeake Bay and serves as a drinking water source for millions of people in the region. There are several tributaries that feed into the Potomac, including the Anacostia River, which has a history of pollution. The river's flow rate can vary greatly depending on seasonal trends, with higher flows during the spring and lower flows during the summer. The river's hydrology is also affected by several dams along its length, including the Great Falls Dam. Interestingly, the river played a significant role in the American Civil War and is home to a variety of wildlife, including bald eagles and river otters.
July 16, 2026
| Elevation | 43.0 ft |
| Last Updated | |
| Gage height, ft | 3.14 ft |
| Nitrate plus nitrite, water, in situ, mg/L as N | 1.61 mg/l as N |
| Stream water level elevation above NAVD 1988, in ft | 40.18 ft |
| Streamflow, ft³/s | 3630.0 ft3/s |
| Specific conductance, water, unfiltered, microsiemens per centimeter at 25°C | 406.0 uS/cm @25C |
| Dissolved oxygen, water, unfiltered, mg/L | 9.1 mg/l |
| Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 ±2.5°, formazin nephelometric units (FNU) | 6.2 FNU |
| pH, water, unfiltered, field, standard units | 8.4 std units |
| Temperature, water, degC | 7.4 deg C |
| Percent of Normal | 89% |
| Year Over Year Average | 4,290 cfs |
| 24hr Flow Prediction | cfs |
| Maximum Recorded | 176,000 cfs |
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