Workgroups & Teams

Current Conditions for the Smelt Monitoring Team (SMT)


Daily Conditions for Last 2 Weeks

Operational Indices Daily Data for Last 2 Weeks for select locations and parameters
DateQWEST (CFS) [DWR]QWEST 7-day (CFS) [DWR]X2 Position (KM) [DWR]OMR Index (CFS) [SacPAS]OMR Index 5-day (CFS) [SacPAS]OMR Index 14-day (CFS) [SacPAS]USGS Tidally Filtered OMR (CFS) [USGS]USGS Tidally Filtered OMR 5-day mean (CFS) [USGS]USGS Tidally Filtered OMR 14-day mean (CFS) [USGS]NDOI (CFS) [DWR]NDOI 3-day (CFS) [DWR]E/I Ratio 3 day (%) [DWR]Sum Pumping Discharge HRO+TRP (CFS) [CDEC:HRO+TRP]Pumping Discharge Harvey O Banks Pumping Plant (CFS) [CDEC:HRO]Pumping Discharge SJR Tracy Pumping Plant (CFS) [CDEC:TRP]Pumping Discharge Barker Slough (CFS) [CDEC:BKS]Pumping Discharge Barker Slough 7-day (CFS) [CDEC:BKS]
DateQWEST (CFS) [DWR]QWEST 7-day (CFS) [DWR]X2 Position (KM) [DWR]OMR Index (CFS) [SacPAS]OMR Index 5-day (CFS) [SacPAS]OMR Index 14-day (CFS) [SacPAS]USGS Tidally Filtered OMR (CFS) [USGS]USGS Tidally Filtered OMR 5-day mean (CFS) [USGS]USGS Tidally Filtered OMR 14-day mean (CFS) [USGS]NDOI (CFS) [DWR]NDOI 3-day (CFS) [DWR]E/I Ratio 3 day (%) [DWR]Sum Pumping Discharge HRO+TRP (CFS) [CDEC:HRO+TRP]Pumping Discharge Harvey O Banks Pumping Plant (CFS) [CDEC:HRO]Pumping Discharge SJR Tracy Pumping Plant (CFS) [CDEC:TRP]Pumping Discharge Barker Slough (CFS) [CDEC:BKS]Pumping Discharge Barker Slough 7-day (CFS) [CDEC:BKS]
2025-09-23-4740-488582-10463-10533-10629-12070-11784-118614611445261.8113067098.004208.003435
2025-09-24-4835-489582-10485-10510-10612-12060-11844-118484519446961.9110676851.004216.005538
2025-09-25-4754-4875-10536-10502-10598-12050-11912-118545068473361.2110866860.004226.005741
2025-09-26-4256-476082-10595-10514-10591-12140-12022-118406013520060.5113437095.004248.008748
2025-09-27-4183-4649-10650-10546-10587-12300-12124-118346431583759.2113497095.004254.006853
2025-09-28-4157-4543-10616-10576-10580-10000-11710-117006312625258.7113267095.004231.004955
2025-09-29-3723-437882-7700-10838-114497585677657.1112907095.004195.004857
2025-09-30-3802-424482-10603-10616-10574-9640-10356-113197433711056.3113587095.004263.004959
2025-10-01-3762-409182-10233-10526-10541-10440-10016-112297416747854.4112526938.004314.004357
2025-10-02-3695-394082-10200-10413-10506-10670-9690-111377249736653.8110156719.004296.004656
2025-10-03-822-344982-10123-10290-10470-10710-9832-1106211254864053.4109666719.004247.004650
2025-10-04-544-2929-10044-10241-10429-11140-10520-11021118501011853.3109456719.004226.004346
2025-10-05-214-2366-9877-10095-10378123101180552.8108606705.004155.004045
2025-10-065138-110082177171395943.533693369.000.004745
Water Quality Daily Data for Last 2 Weeks for select locations and parameters
DateRiver Discharge Flow 3-day Freeport (CFS) [CDEC:FPT]River Discharge Flow SJR nr Vernalis (CFS) [CDEC:VNS]Rio Vista Flow (CFS) [DWR]Water Temperature 3-day Jersey Point (C) [CDEC:SJJ]Water Temperature 3-day SR at Rio Vista Br (C) [CDEC:RVB]Water Temperature Clifton Court (C) [CDEC:CLC]Water Temperature SJR at Antioch (C) [CDEC:ANH]Turbidity 3-day Freeport (FNU) [CDEC:FPT]Water Turbidity 1-day Old River at Bacon Island (USGS) (FNU) [CDEC:OBI]Water Turbidity 1-day Old River at Franks Tract (FNU) [CDEC:OSJ]Water Turbidity 1-day SJR Holland Cut (FNU) [CDEC:HOL]
DateRiver Discharge Flow 3-day Freeport (CFS) [CDEC:FPT]River Discharge Flow SJR nr Vernalis (CFS) [CDEC:VNS]Rio Vista Flow (CFS) [DWR]Water Temperature 3-day Jersey Point (C) [CDEC:SJJ]Water Temperature 3-day SR at Rio Vista Br (C) [CDEC:RVB]Water Temperature Clifton Court (C) [CDEC:CLC]Water Temperature SJR at Antioch (C) [CDEC:ANH]Turbidity 3-day Freeport (FNU) [CDEC:FPT]Water Turbidity 1-day Old River at Bacon Island (USGS) (FNU) [CDEC:OBI]Water Turbidity 1-day Old River at Franks Tract (FNU) [CDEC:OSJ]Water Turbidity 1-day SJR Holland Cut (FNU) [CDEC:HOL]
2025-09-2316662.33828.08954922.5421.9824.5022.566.901.443.390.90
2025-09-2416973.67710.64957522.7021.9124.1022.446.611.392.870.84
2025-09-2517297.00670.161004022.7421.7023.9022.286.321.283.500.98
2025-09-2617771.00687.081046522.5721.4123.7022.116.141.274.460.96
2025-09-2717963.67732.121079122.3721.1723.7021.895.951.202.221.09
2025-09-2818411.00782.721062422.0920.8723.3021.505.841.252.081.01
2025-09-2918669.96788.901146221.9320.5623.0021.285.951.312.141.00
2025-09-3019076.29727.151138720.2222.7021.175.931.592.071.07
2025-10-0119057.29720.881137220.0022.5021.225.881.112.342.35
2025-10-0218881.33744.161114119.8122.2021.115.621.352.660.96
2025-10-0318766.00859.561196519.5221.8020.835.641.403.051.01
2025-10-0418794.671024.721227819.1721.8020.725.713.563.491.40
2025-10-0519032.331194.001240418.8121.7020.615.841.447.811.44
2025-10-0619044.331311.001246218.5721.7020.675.881.733.960.97

Delta Smelt Releases

No Delta Smelt releases reported to SacPAS for WY2026.

Summary Tables

Smelt Monitoring Last 2 Weeks

Smelt Monitoring Last 2 Weeks
MonitoringSpeciesMark CodeFirst DateLast DatenfishSacPAS Max Possible DateSacPAS Data Retrieval Method
EDSMDelta SmeltAll Catch2025-10-062025-10-0612025-10-07Daily. Data are preliminary and are subject to correction and revision.
EDSMDelta SmeltNone2025-10-062025-10-0612025-10-07Daily. Data are preliminary and are subject to correction and revision.
EDSMLongfin SmeltAll Catch2025-10-022025-10-0212025-10-07Daily. Data are preliminary and are subject to correction and revision.

Table only displays species collected in the previous two weeks.

Smelt Monitoring Water Year

Smelt Monitoring WY2026
MonitoringSpeciesMark CodeFirst DateLast DatenfishSacPAS Max Possible DateSacPAS Data Retrieval Method
EDSMDelta SmeltAll Catch2025-10-062025-10-0612025-10-07Daily. Data are preliminary and are subject to correction and revision.
EDSMLongfin SmeltAll Catch2025-10-022025-10-0212025-10-07Daily. Data are preliminary and are subject to correction and revision.

Smelt Salvage Last 2 Weeks

No Delta Smelt or Longfin Smelt caught in SWP and CVP Facilities last 2 weeks. Based on daily retrieval of CDFW Salvage DB.

SacPAS Max Possible Date: 2025-10-06

Smelt Salvage Water Year

No Delta Smelt or Longfin Smelt caught in SWP and CVP Facilities WY2026. Based on daily retrieval of CDFW Salvage DB.

SacPAS Max Possible Date: 2025-10-06

Figures

Water Temperature

graph water temperature daily

Onset of OMR Management

graph freeport 3day running average

The information on OMR Managment on this website is summarized for Delta Smelt from the OMR Entrainment Management Guidance Document and does not reflect a comprehensive description of each of the OMR actions.

"First Flush" conditions may be triggered between December 1 and January 31 and include: Running 3-day average of the daily flows at Freeport is greater than 25,000 cfs and running 3-day average of the daily turbidity at Freeport is 50 NTU or greater, or real-time monitoring indicates a high risk of migration and dispersal into areas at high risk of future entrainment. This "First Flush" may only be initiated once during the December through January period and will not be required if: spent female Delta Smelt are collected in monitoring surveys.

Turbidity Bridge Avoidance

graph turbidity daily average sacramento san joaquin

Turbidity Bridge Avoidance ("South Delta Turbidity"): After the Integrated Early Winter Pulse Protection (above) or February 1 (whichever comes first) and until a ripe or spent female is detected or April 1 (whichever is first), Reclamation and DWR propose to manage exports in order to maintain daily average turbidity in Old River at Bacon Island (OBI) at a level of less than 12 NTU. Reclamation and DWR recognize that readings at individual sensors or localized groups of sensors can generate spurious results in real-time. To avoid triggering an OMR flow action during a sensor error or a localized turbidity spike that might be caused by local flows or a wind-driven event, Reclamation and DWR will consider and review data from other locations.

Larval and Juvenile Delta Smelt Protection

graph operations QWEST NDOI X2 daily

End of OMR Management

graph clifton court daily

OMR criteria may control operations until June 30 (for Delta Smelt and Chinook salmon), until June 15 (for steelhead/rainbow trout), or when the following species-specific off ramps have occurred, whichever is earlier.

Delta Smelt: when the daily mean water temperature at CCF reaches 77°F for 3 consecutive days. 77°F is equal to 25°C.

Operations and Hydrology

graph old river flow daily
graph omr index
graph pumping and flow into delta daily
graph Barker Slough temperature and turbidity daily

Water Year Tables

USFWS Chipps Island Trawl

No Delta Smelt or Longfin Smelt caught in Chipps Island Trawl USFWS Lodi juvenile monitoring WY2026.

EDSM

WY2026 Delta Smelt and Longfin Smelt caught in Enhanced Delta Smelt Monitoring (EDSM)
Sample Date TimeSpeciesMark CodenfishFork Length (mm)SubregionStratumRegionMethodSource
2025-10-06 11:30:00Delta SmeltNone154Lower Sacramento RiverLower SacramentoWestKodiak TrawlEDSM Provisional, USFWS Lodi
2025-10-02 10:44:00Longfin SmeltNone161Grizzly BaySuisun MarshWestKodiak TrawlEDSM Provisional, USFWS Lodi

Salvage at the SWP and CVP Delta Fish Facilities

No Delta Smelt or Longfin Smelt caught in SWP and CVP Facilities WY2026.

Hourly Table

Hourly Data for Last 7 Days for select locations and parameters (used in figures)
DateHourRiver Discharge Flow Old River at Bacon Island (USGS) (CFS) [CDEC:OBI]River Discharge Flow Old River at Highway 4 (CFS) [CDEC:OH4]
DateHourRiver Discharge Flow Old River at Bacon Island (USGS) (CFS) [CDEC:OBI]River Discharge Flow Old River at Highway 4 (CFS) [CDEC:OH4]
2025-09-300-2720.00
2025-09-301139.00
2025-09-302-805.00
2025-09-303-1320.00
2025-09-304-1670.00
2025-09-305-1360.00
2025-09-3062650.00-1820.00
2025-09-3071340.00-1330.00
2025-09-308-965.00163.00
2025-09-309-5690.00-1620.00
2025-09-3010-5630.00
2025-09-3011-6720.00
2025-09-3012
2025-09-3013
2025-09-3014
2025-09-3015-9890.00
2025-09-3016-8160.00
2025-09-3017-7580.00
2025-09-3018-7890.00
2025-09-3019-7940.00-9810.00
2025-09-3020-8410.00-8660.00
2025-09-3021-8800.00-6840.00
2025-09-3022-8560.00-6860.00
2025-09-3023-8810.00-6770.00
2025-10-010-5890.00-5690.00
2025-10-011-729.00-6000.00
2025-10-0122220.00-3820.00
2025-10-0133640.00-1620.00
2025-10-0143750.00
2025-10-0153760.00
2025-10-016
2025-10-0172690.00
2025-10-0182320.00405.00
2025-10-019952.001350.00
2025-10-0110-5370.00
2025-10-0111
2025-10-0112
2025-10-0113-9060.00
2025-10-0114
2025-10-0115
2025-10-0116
2025-10-0117-7720.00
2025-10-0118-4290.00
2025-10-0119-4150.00-7430.00
2025-10-0120-5590.00-4710.00
2025-10-0121-7760.00-4530.00
2025-10-0122-9690.00-5840.00
2025-10-0123
2025-10-020
2025-10-021-8910.00-9070.00
2025-10-022-8150.00
2025-10-023
2025-10-0245830.00
2025-10-0255230.00
2025-10-0264700.00
2025-10-0273520.00
2025-10-0282830.00
2025-10-0292020.00
2025-10-0210-1250.00
2025-10-0211-9010.00
2025-10-0212
2025-10-0213
2025-10-0214
2025-10-0215
2025-10-0216
2025-10-0217
2025-10-0218-3500.00
2025-10-0219-1460.00
2025-10-0220-414.00
2025-10-0221-1500.00
2025-10-0222-6450.00
2025-10-0223
2025-10-030
2025-10-031
2025-10-032
2025-10-033-8370.00
2025-10-034796.00
2025-10-0356040.00
2025-10-0365550.00
2025-10-0374580.00
2025-10-0383850.00
2025-10-0392610.00
2025-10-0310622.00
2025-10-0311-4400.00
2025-10-0312
2025-10-0313
2025-10-0314
2025-10-0315
2025-10-0316
2025-10-0317
2025-10-0318-3480.00
2025-10-0319-100.00
2025-10-03201790.00
2025-10-03213520.00
2025-10-0322490.00
2025-10-0323-7050.00
2025-10-040
2025-10-041
2025-10-042
2025-10-043
2025-10-044-9590.00
2025-10-045163.00
2025-10-0466570.00
2025-10-0475550.00
2025-10-0484490.00
2025-10-0493130.00
2025-10-04101990.00
2025-10-0411-106.00
2025-10-0412-7950.00
2025-10-0413
2025-10-0414
2025-10-0415
2025-10-0416
2025-10-0417
2025-10-0418-7470.00
2025-10-0419-1270.00
2025-10-0420496.00
2025-10-04211440.00
2025-10-04224520.00
2025-10-04231920.00
2025-10-050-8630.00
2025-10-051
2025-10-052
2025-10-053
2025-10-054
2025-10-055
2025-10-056194.00
2025-10-0576340.00
2025-10-0585520.00
2025-10-0594350.00
2025-10-05103050.00
2025-10-0511714.00
2025-10-0512-4590.00
2025-10-0513
2025-10-0514
2025-10-0515
2025-10-0516
2025-10-0517
2025-10-0518
2025-10-0519-1650.00
2025-10-05201890.00
2025-10-05214780.00
2025-10-05225000.00
2025-10-05233830.00
2025-10-060-256.00
2025-10-061-9730.00
2025-10-062
2025-10-063
2025-10-064
2025-10-065
2025-10-066-7060.00
2025-10-0673480.00
2025-10-0688240.00
2025-10-0697100.00
2025-10-06105440.00
2025-10-06114100.00
2025-10-0612-108.00
2025-10-0613-9290.00
2025-10-0614
2025-10-0615
2025-10-0616
2025-10-0617
2025-10-0618
2025-10-0619-340.00
2025-10-06208220.00
2025-10-06219100.00
2025-10-06228520.00
2025-10-06237280.00

Data Notes & Resources

Content on this page is updated daily and includes the most up-to-date datasets contained in the SacPAS database.

Smelt Monitoring

The Enhanced Delta Smelt Monitoring Program (EDSM) Weekly Summary, USFWS Lodi. Data are preliminary and are subject to correction and revision.

Smelt Surveys Current and Historical

Current and Historical Delta Smelt Surveys query, HTML table and CSV

Annually updated Historical Delta Smelt Combined Sampling by Stratum plots removed until further review.

Data Notes

  • We obtain Enhanced Delta Smelt Monitoring (EDSM) Provisional data from Delta Juvenile Fish Monitoring Program, USFWS Lodi Office; data are preliminary and are subject to correction and revision. Please see the Environmental Data Initiative (EDI) Portal Interagency Ecological Program and US Fish and Wildlife Service: San Francisco Estuary Enhanced Delta Smelt Monitoring Program data for the finalized dataset.
  • We obtain salvage data from Fish Salvage Monitoring, CDFW Bay Delta Region
    • Salvage Database, https://filelib.wildlife.ca.gov/Public/Salvage/
  • We obtain Delta Operations (single day and running 30 day reports) from Operations and Delta Status, California Department of Water Resources. SacPAS has archived this data since October 2016.
    • "QWEST", "NDOI", "E/I Ratio 3-day", and "Rio Vista Flow" from the "Delta Status and Operations, Hydrologic Conditions Summary (daily)" pdf. https://water.ca.gov/-/media/DWR-Website/Web-Pages/Programs/State-Water-Project/Operations-And-Maintenance/Files/Operations-Control-Office/Delta-Status-And-Operations/Delta-Hydrologic-Conditions-Daily-Summary.pdf
    • "X2 Position": Data from the "Delta Status and Operations, Delta Operations Summary (daily)" pdf. For plotting purposes, SacPAS substitutes ">81km" with "82" and "<56km" with "55". https://water.ca.gov/-/media/DWR-Website/Web-Pages/Programs/State-Water-Project/Operations-And-Maintenance/Files/Operations-Control-Office/Delta-Status-And-Operations/Delta-Operations-Daily-Summary.pdf
  • On a daily basis, SacPAS calculates "OMR Index", "OMR Index 5-day", and "OMR Index 14-day" based on methods as described in:
    California Department of Water Resources (DWR). 2017. Old and Middle River Flow Review: USGS Gauge Readings versus Index Calculations for 2011 through 2017. Online: https://cawaterlibrary.net/wp-content/uploads/2017/12/4-Old-and-Middle-River-Flow-Review.pdf
    See OMR Tidally Filtered Flow and Index Calculations as performed by SacPAS for full details. SacPAS calculated OMR Index is available for 28 October 2016 to the present.
  • On a daily basis, we download event, hourly, and daily data from California Data Exchange Center (CDEC) for select parameters and sites for inclusion in the SacPAS database.
    • As of 2024-12-06, daily averages for CDEC stations and parameters on this webpage, exclusively, are daily averages as published by CDEC. Missing CDEC daily averages are filled by SacPAS from CDEC data where event- or hourly-timescale data are available (using hours 01-24 in local time). A correction to our process was implemented on 2025-01-14.
  • We obtain Chipps Island Trawl catch data on a weekly basis via email, typically Monday.