University of Washington

San Joaquin River Basin Current Conditions

Select a River Condition parameter of interest to view current measured values at select locations on map. Zoom In 3 levels to view current condition charts. View all current conditions for the select locations in the data tables below the map.



Data courtesy of CDEC. An asterisk (*) following a value on the map indicates the value reported not current, but it is the most recent up to 5 days prior.

For Water Temperature at locations downstream of the Merced River confluence, value-based color shading is introduced on the map for a quick visual cue by threshold reference categories (1) steelhead alevins below 54.0 °F (shaded light green) or (2) steelhead juveniles (suboptimal) above 68.0 °F (shaded light red).



San Joaquin River Basin Select River Conditions for 2026-05-05

  Stanislaus Tuolumne Merced San Joaquin Upper San Joaquin
Location GDW OBB RIP KOT LGN TRW MOD TRT MBH CRS MST NEW SCL SJP MRB VNS MSD OH1 SJF H41 GRF SJB SJH EBM SJS SMN
Flow (CFS) 351    474    428    633    304    327    362    444    277    NA   177    773    819    974    820    1856    1652    1208    640    652    609    482    480    453    462    548   
Click on the icon to view current 60 days plot for location and river conditions.
  Stanislaus Tuolumne Merced San Joaquin Upper San Joaquin
Location OBB RIP RPN MOD CRS SCL MRB VNS MSD OH1 FWQ H41 SKB GRF SDP EBM SJS SMN
Water Temperature (°F) 55.1    58.3    59.9    62.8    NA   68.1    64.5    65.3    65.6    65.7    48.6    52.3    57.6    58.1      66.3      69.2   
Click on the icon to view current 60 days plot for location and river conditions.
  Stanislaus Tuolumne Merced Upper San Joaquin
Location SNS TLG MRC SBF
Full Natural Flow (CFS) 2666 a    4465 a    2199 a    4064 a   
Note: a. Data is not available for 2026-05-05. Most recent data up to 5 days prior is reported.
Click on the icon to view current 60 days plot for location and river conditions.
  Stanislaus Tuolumne Merced Upper San Joaquin
Location NML DNP EXC MIL
Reservoir Storage (TAF) 1870    1863    868    474   
Res Above Top of Conserv Stor (TAF) -388    104 a    -1 a    -47 a   
Reservoir Inflow (CFS) 2877    3468 a    2130 a    3801 a   
Reservoir Outflow (CFS) 1468    2245 a    1221 a    2173 a   
Control Regulating Dischg (CFS) 0        858 a   
Note: a. Data is not available for 2026-05-05. Most recent data up to 5 days prior is reported.
Click on the icon to view current 60 days plot for location and river conditions.
  Stanislaus San Joaquin Upper San Joaquin
Location RPN MRB MSD OH1 FWQ GRF SDP SMN
Dissolved Oxygen (mg/L) 9.5    8.3    8.2    7.0    0.8    NA   NA   7.7   
Click on the icon to view current 60 days plot for location and river conditions.

Data retrieved from CDEC; Current River Conditions tables generated by SacPAS.

Updated: Wednesday, 06-May-2026 06:59:18 PDT