Situational Awareness (Monday, 2025-10-06)
According to Middle Atlantic River Forecast Center predictions, no rain fell in the Potomac watershed over the past 3 days, but approximately 1/2 inch is expected over the next 3 days.
Special Conditions
USGS stream gage website pages will not be updated due to the lapse in federal funding. However, at this time updated streamflow data continues to be available.
Daily flows:
Little Falls gage flow 2025-10-05: 995 MGD (1540 cfs)
Little Falls gage flow 2025-10-06: 885 MGD (est., based on recently available real-time data) (1370 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2025-10-05: 1053 MGD (1630 cfs)
Point of Rocks flow 2025-10-06: 1073 MGD (est., based on recently available real-time data) (1660 cfs)
Yesterday's estimated daily flows:
Great Falls estimated flow 2025-10-05: 995 MGD (1539 cfs)
Note: Estimated flow below Great Falls intake is flow at Little Falls plus Little Falls water supply withdrawal.
Yesterday's Washington metropolitan area Potomac River withdrawals and discharges (2025-10-05):
Fairfax Water Corbalis withdrawal - Potomac: 110 MGD
WSSC Water Potomac withdrawal: 103 MGD
Washington Aqueduct withdrawal - Great Falls: 127 MGD
Washington Aqueduct withdrawal - Little Falls: 0 MGD
Loudoun Water withdrawal: 12 MGD
Loudoun Water Broad Run discharge: 7 MGD
Total Potomac withdrawal: 352 MGD
Total net Potomac withdrawal: 345 MGD
Loudoun Water Potomac River (PR) flow values for drought operations protocol (based on yesterday's flows):
QPR: 1630 cfs
QPR, obs: 1630 cfs
QPR, WS: 0 cfs
Interstate Commission on the Potomac River Basin