San Carlos Reservoir Water Level History
Thirty-day lake-level chart, recent highs and lows, net change and daily summaries from the matched USGS station.
San Carlos Reservoir water-level chart
Source: U.S. Geological Survey monitoring station ↗. Recent measurements may be provisional.
What has San Carlos Reservoir been doing?
Across the available 30-day series, San Carlos Reservoir is rising overall. The measured range runs from 2,399.82 ft to 2,419.91 ft, with a net change of +19.97 ft.
Lake levels can respond to rainfall, watershed inflow, dam and hydropower operations, seasonal target elevations, evaporation and downstream release requirements. This page reports what the matched sensor measured; it does not infer why an operator changed a reservoir.
Recent daily levels
| Date | Low | Average | High |
|---|---|---|---|
| Oct 7 | 2419.76 ft | 2419.83 ft | 2419.91 ft |
| Oct 6 | 2419.31 ft | 2419.56 ft | 2419.76 ft |
| Oct 5 | 2418.11 ft | 2418.85 ft | 2419.30 ft |
| Oct 4 | 2415.03 ft | 2416.71 ft | 2418.09 ft |
| Oct 3 | 2411.85 ft | 2413.33 ft | 2414.98 ft |
| Oct 2 | 2410.15 ft | 2410.92 ft | 2411.82 ft |
| Oct 1 | 2408.70 ft | 2409.44 ft | 2410.14 ft |
| Sep 30 | 2407.58 ft | 2408.04 ft | 2408.69 ft |
| Sep 29 | 2406.33 ft | 2406.94 ft | 2407.57 ft |
| Sep 28 | 2406.19 ft | 2406.24 ft | 2406.32 ft |
| Sep 27 | 2406.06 ft | 2406.14 ft | 2406.19 ft |
| Sep 26 | 2405.91 ft | 2406.00 ft | 2406.06 ft |
| Sep 25 | 2405.78 ft | 2405.85 ft | 2405.91 ft |
| Sep 24 | 2405.60 ft | 2405.69 ft | 2405.77 ft |
| Sep 23 | 2405.40 ft | 2405.51 ft | 2405.60 ft |
| Sep 22 | 2405.16 ft | 2405.30 ft | 2405.40 ft |
| Sep 21 | 2404.76 ft | 2404.99 ft | 2405.15 ft |
| Sep 20 | 2403.76 ft | 2404.35 ft | 2404.75 ft |
| Sep 19 | 2402.14 ft | 2402.94 ft | 2403.75 ft |
| Sep 18 | 2400.97 ft | 2401.51 ft | 2402.13 ft |
| Sep 17 | 2400.42 ft | 2400.63 ft | 2400.96 ft |
| Sep 16 | 2400.22 ft | 2400.33 ft | 2400.42 ft |
| Sep 15 | 2399.99 ft | 2400.12 ft | 2400.22 ft |
| Sep 14 | 2399.85 ft | 2399.92 ft | 2400.00 ft |
| Sep 13 | 2399.84 ft | 2399.86 ft | 2399.92 ft |
| Sep 12 | 2399.84 ft | 2399.86 ft | 2399.89 ft |
| Sep 11 | 2399.82 ft | 2399.86 ft | 2399.88 ft |
| Sep 10 | 2399.86 ft | 2399.89 ft | 2399.92 ft |
| Sep 9 | 2399.86 ft | 2399.90 ft | 2399.93 ft |
| Sep 8 | 2399.89 ft | 2399.91 ft | 2399.93 ft |
San Carlos Reservoir level-history FAQ
How has San Carlos Reservoir water level changed over the last 30 days?
Across the available 30-day sensor series, the net change is +19.97 ft and the overall direction is rising.
What was the highest San Carlos Reservoir level in the last 30 days?
The highest reading in the available 30-day series is 2,419.91 ft.
What was the lowest San Carlos Reservoir level in the last 30 days?
The lowest reading in the available 30-day series is 2,399.82 ft.
Are historical USGS lake readings final?
Not always. Recent readings may be marked provisional and can be revised by the source agency after quality review.