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Sacramento River Water Temperature Threshold Analysis

Ecological Thresholds Queries
Clear Creek Lower American River Sacramento River Stanislaus River

Actual pre-season and in-season management decision processes are complex employing multiple sources of observed data, models, and forecasts. For further information, see the Threshold Analysis Criteria section.

Note: Years prior to 2019 pre-date the Reclamation Proposed Action and are provided for historical perspective on conditions.
graph 2025 Sacramento River Water Temp (°F)
2025 Sacramento River Water Temperature (°F) at multiple locations from Keswick Dam to Bend Bridge. Preliminary data from CDEC; subject to revision. 7 Day Average Daily Maximum (7DADM) calculations and figure generated by SacPAS.
Central Valley Operations Office, USBR: 2025 Northern CVP Water Temperature Report, with Sacramento River temperatures and flows, temperature control point, and Lake Shasta Isothermalbaths. File modified: January 21 2025 08:29:22.
Central Valley Operations Office, USBR: 2025 Shasta Temperature Control Device (TCD) Configuration with gate change operations, elevation, and temperatures. File modified: January 15 2025 11:31:39.
Shasta Temperature Control Device (TCD) Change Dates
Start Date End Date
1/15/2025 Current
1/2/2025 1/15/2025
1/2/2025 1/15/2025
12/17/2024 1/2/2025

No 2025 data during target period, 5/15-10/31.

No 2025 data during target period, 5/15-10/31.

No 2025 data during target period, 5/15-10/31.

No 2025 data during target period, 5/15-10/31.

No 2025 data during target period, 5/15-10/31.

graph DAT all sites and Reservoir Data
2025 Sacramento River Daily Average Water Temperature. Temperature Locations from Keswick Dam to Bend Bridge. Shasta and Keswick Reservoir Storage in MAF and Outflow in TCFS. Preliminary data from CDEC; subject to revision. Figure generated by SacPAS.
graph Daily Max and 7DADM select sites
2025 Sacramento River Water Temperature. Daily Maximum and 7 Day Average Daily Maximum (7DADM) for SR Upstream of Hwy 44 (SAC) and SR abv Clear Creek (CCR). Preliminary data from CDEC; subject to revision. 7DADM calculations and figure generated by SacPAS.
download CSV  
2025 Sacramento River Temperature Data Table, Threshold Period 5/15/ - 10/31
Date Source Shasta
Storage
(MAF)		 Shasta
Outflow
(TCFS)		 Keswick
Outflow
(TCFS)		 KWK DAT WTemp °F SAC DAT WTemp °F CCR DAT WTemp °F BSF DAT WTemp °F JLF DAT WTemp °F BND DAT WTemp °F KWK 7DADM WTemp °F SAC 7DADM WTemp °F CCR 7DADM WTemp °F SAC Max WTemp °F CCR Max WTemp °F
Date Source Shasta
Storage
(MAF)		 Shasta
Outflow
(TCFS)		 Keswick
Outflow
(TCFS)		 KWK DAT WTemp °F SAC DAT WTemp °F CCR DAT WTemp °F BSF DAT WTemp °F JLF DAT WTemp °F BND DAT WTemp °F KWK 7DADM WTemp °F SAC 7DADM WTemp °F CCR 7DADM WTemp °F SAC Max WTemp °F CCR Max WTemp °F
2025-01-20 CDEC 3.482 6.067 5.808 49.9 49.7 49.7 48.8   48.0 50.4 50.9 51.5 50.5 51.0
2025-01-19 CDEC 3.477 6.606 6.115 50.0 49.8 49.9 48.9   48.3 50.6 50.9 51.5 50.8 51.3
2025-01-18 CDEC 3.475 8.071 7.121 50.1 50.0 50.0 49.2   48.6 50.7 50.9 51.5 50.9 51.4
2025-01-17 CDEC 3.477 8.756 8.220 50.2 50.2 50.3 49.6   49.1 50.8 50.9 51.4 50.9 51.7
2025-01-16 CDEC 3.480 10.168 9.789 50.4 50.4 50.6 50.1   49.5 50.9 51.0 51.4 51.0 51.7
2025-01-15 CDEC 3.486 12.122 11.237 50.6 50.6 50.8 50.2   49.6 51.0 51.1 51.5 51.1 51.8
2025-01-14 CDEC 3.497 13.291 13.052 50.6 50.6 50.7 50.3   49.6 51.1 51.1 51.5 50.9 51.4
2025-01-13 CDEC 3.508 15.742 14.954 50.6 50.5 50.6 50.0   49.4 51.1 51.2 51.5 50.8 51.0
2025-01-12 CDEC 3.519 15.122 15.003 50.7 50.6 50.6 50.1   49.5 51.2 51.3 51.6 50.9 51.2
2025-01-11 CDEC 3.528 14.832 14.995 50.7 50.7 50.8 50.4   50.0 51.2 51.3 51.7 50.8 51.2
2025-01-10 CDEC 3.536 15.183 15.006 51.1 51.1 51.2 50.8   50.4 51.3 51.4 51.8 51.4 51.8
2025-01-09 CDEC 3.542 15.037 15.033 51.2 51.2 51.4 50.9   50.4 51.3 51.4 51.8 51.5 51.9
2025-01-08 CDEC 3.547 15.646 15.047 51.2 51.2 51.3 50.8   50.1 51.1 51.2 51.6 51.5 51.9
2025-01-07 CDEC 3.549 15.268 15.052 51.2 51.1 51.2 50.9   50.5 51.0 51.1 51.4 51.3 51.6
2025-01-06 CDEC 3.548 14.810 14.975 51.2 51.2 51.4 51.2   50.8       51.5 51.9
2025-01-05 CDEC 3.542 14.047 14.921 51.0 51.0 51.2 50.9   50.4       51.2 51.7
2025-01-04 CDEC 3.532 12.758 14.888 51.0 51.0 51.2 50.6   50.0       51.1 51.5
2025-01-03 CDEC 3.514 13.124 14.931 51.2 51.0 51.1 50.6   50.4       51.5 52.0
2025-01-02 CDEC 3.505 12.927 14.465 50.3 50.3 50.4 50.3   49.8       50.4 50.6
2025-01-01 CDEC 3.490 10.240 11.530 50.2 50.2 50.3 49.7   48.9       50.4 50.4

Data Methods and Notes

Data Methods

  1. Data Courtesy of CDEC
  2. Hourly data is retrieved from CDEC on a daily basis.
  3. Columbia Basin Research (CBR) QA/QC processes hourly data for outliers, false data (e.g., 32F measured by satellite), and data outside expected range of observation (e.g., 90F). Data loaded into CBR database.
  4. CBR calculates Daily Average values based on CBR cleaned hourly values.
  5. CBR calculates 7 Day Average of Daily Maximum (7DADM) values based on CBR cleaned hourly values.
  6. Query for daily average water temperature for selected year and query maximum hourly value per day for selected year.
  7. Examine daily average data for criterion during date periods.

Threshold Analysis Criteria

Please refer to the Sacramento River Temperature Task Group (SRTTG) annual reports for details on within water year activities.