US GEOLOGICAL SURVEY, OREGON WATER SCIENCE CENTER
WATER AVAILABILITY REPORT FOR SEPTEMBER 2025
------------------- Change ---------------------
Monthly mean in dis- Accumulated Runoff
discharge charge For the Period
------------------- from Oct. to Sep.
NRCS Cubic Percent previous ---------------------
SWSI feet per of month Percent
Station Basin second average (percent) of average
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Donner Und Blitzen Harney 50 125 -14 155
nr Frenchglen
(*)Deep Creek Lake 17 106 13 152
above Adel County
(*)Chewaucan River Lake 40 143 5 199
near Paisley County
Williamson River Klamath 564 115 0 141
near Chiloquin
Owyhee River Owyhee 110 95 -19 105
near Rome
(*)NF Malheur River Malheur 52 116 -5 155
near Beulah
Grande Ronde R Grande Ronde 486 77 -3 82
at Troy Powder/Burnt
Umatilla River Umatilla 52 121 -2 90
nr Gibbon Lower John Day
John Day River Upper John Day 162 118 12 132
at Service Crk
(*)Little Deschutes Upper 96 83 -22 98
River nr LaPine Deschutes
Hood River Lower Deschutes 243 79 -3 85
nr Hood River Mt.Hood
Willamette River Willamette 7,620 88 15 103
at Salem
Wilson River North 53 36 -26 90
near Tillamook Coast
Umpqua River Rogue/Umpqua 1,010 86 15 123
near Elkton
Rogue River Rogue/Umpqua 2,210 111 -10 140
near Agness
SF Coquille River South Coast 16 46 -20 113
at Powers
Chetco River South Coast 70 56 4 122
near Brookings
All data should be considered provisional and subject to revision.
Percent of average computed using 30-year base period, water years 1991-2020.
(*) provided by Oregon Water Resources Department
11/18/2025