USGS Streamgage 11342000
Sacramento River A Delta, CA
Sacramento River A Delta, CA is USGS streamgage 11342000 in California, monitoring river discharge in hydrologic subbasin 18020005. It drains a watershed of about 425 square miles. Discharge records at this site go back to 1944. Typical flow runs near 279.5 cfs in July and 1,741 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- California
- Drainage area
- 425 sq mi
- Gauge elevation
- 1,078 ft
- Subbasin (HUC-8)
- 18020005
- Coordinates
- 40.93959, -122.41724
- USGS site number
- 11342000
- Records begin
- 1944-10-01 (82 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 82 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 291.1 | 949.4 | 4,551.3 | |
| February | 472.7 | 1,324 | 5,444.1 | |
| March | 625.4 | 1,647.7 | 4,390.6 | |
| April | 740.7 | 1,741 | 3,584.7 | |
| May | 494.5 | 1,417.6 | 3,067.7 | |
| June | 280 | 562.1 | 1,602.7 | |
| July | 200.9 | 279.5 | 529.1 | |
| August | 173 | 219.9 | 321.9 | |
| September | 167.4 | 207.1 | 286.1 | |
| October | 180.1 | 232.7 | 431.1 | |
| November | 205.2 | 328.6 | 1,431.1 | |
| December | 231.8 | 568.4 | 3,330 |
All values in cubic feet per second (cfs).
Common questions
- When does Sacramento River A Delta, CA normally run highest?
- April, on the long-term record. The median daily flow that month is about 1,741 cfs, against 207.1 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Sacramento River A Delta, CA?
- It depends on the month. In January, half of days historically fall near 949.4 cfs, with the middle 80% of days between 291.1 and 4,551.3 cfs. The month-by-month table on this page gives the full range.
- How long has Sacramento River A Delta, CA been measured?
- Discharge records at USGS site 11342000 begin in 1944, about 82 years, covering roughly 9,126 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Sacramento River A Delta, CA?
- The gauge sits at 40.93959, -122.41724, in California, in hydrologic subbasin 18020005, at an elevation of about 1,078 feet, draining roughly 425 square miles.
- Can I use Sacramento River A Delta, CA data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.