US GEOLOGICAL SURVEY, OREGON WATER SCIENCE CENTER
WATER AVAILABILITY REPORT FOR APRIL 2026
------------------- Change ---------------------
Monthly mean in dis- Accumulated Runoff
discharge charge For the Period
------------------- from Oct. to Apr.
NRCS Cubic Percent previous ---------------------
SWSI feet per of month Percent
Station Basin second average (percent) of average
------------------------------------------------------------------------------------------
Donner Und Blitzen Harney 124 60 25 83
nr Frenchglen
(*)Deep Creek Lake 129 34 -13 79
above Adel County
(*)Chewaucan River Lake 178 49 -34 113
near Paisley County
Williamson River Klamath 804 50 -27 78
near Chiloquin
Owyhee River Owyhee 205 10 -26 24
near Rome
(*)NF Malheur River Malheur 128 36 11 62
near Beulah
Grande Ronde R Grande Ronde 4,540 69 -11 90
at Troy Powder/Burnt
Umatilla River Umatilla 615 103 3 105
nr Gibbon Lower John Day
John Day River Upper John Day 2,780 49 31 60
at Service Crk
(*)Little Deschutes Upper 109 42 -19 58
River nr LaPine Deschutes
Hood River Lower Deschutes 774 58 -58 95
nr Hood River Mt.Hood
Willamette River Willamette 16,800 64 -31 70
at Salem
Wilson River North 708 54 -71 100
near Tillamook Coast
Umpqua River Rogue/Umpqua 7,010 70 5 53
near Elkton
Rogue River Rogue/Umpqua 2,550 37 -39 55
near Agness
SF Coquille River South Coast 475 48 -13 52
at Powers
Chetco River South Coast 956 33 -26 61
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
5/4/2026