Reservoirs
Near normalNew Don Pedro Reservoir water level
Live reservoir storage and water level in Tuolumne-San Joaquin basin, California
Data through Sep 29, 2026 · source last checked Oct 1, 2026 · page revised Oct 1, 2026
Cite
- Storage
About this data
- Source
- US Bureau of Reclamation RISE; California reservoirs via CA DWR CDEC
- Series
- End-of-day reservoir storage
- Geography
- New Don Pedro Reservoir water level
- Unit
- acre-feet
- Calculation
- Daily reading
- Last observation
- Sep 29, 2026
- Update frequency
- Daily
Now 1.53M af, 0% above the 5-yr median, 75% of capacity.
New Don Pedro storage was 1.53M af on Sept. 29, down 1.1% on the week and 5.0% over the month. Year-over-year, storage is down 2.3%. At 75% of capacity, the reservoir sits at the 5-year median.
| Period | Current | Prior | Change |
|---|---|---|---|
| Week over week | 1.53M af | 1.55M af | -1.1% |
| Month over month | 1.53M af | 1.61M af | -5.0% |
| Year over year | 1.53M af | 1.57M af | -2.3% |
| vs 5-yr median | 1.53M af | 1.53M af | +0.2% |
| Measure | Value |
|---|---|
| Latest reading, Sep 29, 2026 | 787.32 ft above sea level |
| Change from a week earlier | -1.55 ft |
| Change from a year earlier | -3.37 ft |
| 5-yr median for the date | 787 ft |
| Below full pool | 42.68 ft |
| Five-year low | 77.03 ft (Oct 26, 2024) |
| Five-year high | 825.27 ft (Jul 25, 2023) |
| Measure | Value | Source |
|---|---|---|
| Full pool elevation | 830 ft above sea level | TID |
| Maximum depth at the dam | 560 ft | USACE NID |
| Surface area at full pool | 12,960 acres | TID |
| Total capacity | 2,030,000 acre-feet | CDEC |
Previous weeks
Week of Sep 23, 2026
New Don Pedro storage is 1.55M af, down 5.1% over the month and 2.1% from a year ago. The reservoir remains at the 5-year median and holds 76% of capacity.
An earlier week
New Don Pedro storage stands at 1.55M af, down 5.1% on the month and 1.1% on the week. Year-over-year storage is down 2.1%, though current levels sit at the 5-year median.
Week of Sep 14, 2026
Storage at New Don Pedro fell to 1.57M af, down 1.3% on the week and 5.4% over the month. At 77% of capacity, the reservoir remains at the 5-year median.
Week of Sep 1, 2026
New Don Pedro storage fell to 1.61M af, down 1.2% on the week as drawdown continues, holding 79% of capacity. Over the month the reservoir has dropped 6.2%, tracking 1% below its 5-year median.
About New Don Pedro Reservoir
New Don Pedro Reservoir's water level is 787.32 feet above sea level as of Sep 29, 2026, 42.68 feet below full pool (830 feet), with 1.53 million acre-feet in storage (75% of capacity). That is 1.55 feet lower than a week earlier and 3.37 feet lower than a year earlier.
New Don Pedro Dam backs up the Tuolumne River in the Sierra foothills, owned and operated by the Turlock and Modesto Irrigation Districts rather than a federal agency. At roughly two million acre-feet it counts among California's larger reservoirs, run for irrigation, hydropower, and flood control. The districts coordinate its winter flood space with the Army Corps of Engineers.
Total capacity is 2.03M af, over the past five years storage has ranged from 968,734 af to 1.97M af.
New Don Pedro Reservoir is one of the 21 major reservoirs this site totals each day. For the combined picture, western reservoir levels carries the storage of all 21 on one chart, which is the number to watch when the question is about the West as a whole rather than about this project.
Those figures describe the reservoir at full pool, not today. The chart at the top of this page tracks storage in acre-feet and the elevation table tracks the water surface in feet, so read storage against total capacity for how full the reservoir is, and the elevation against the full pool elevation and maximum depth for the size of the water column behind the dam. The two do not move together one for one: a reservoir narrows as it deepens, so one holding half its capacity still stands more than half as deep.
Sources: full pool elevation and surface area from the Turlock Irrigation District; maximum depth from the Army Corps' National Inventory of Dams; total capacity from the California Data Exchange Center.