Reservoirs
Near normalNew Don Pedro Reservoir water level
Live reservoir storage and water level in Tuolumne-San Joaquin basin, California
Data through Sep 8, 2026 · source last checked Sep 10, 2026 · page revised Sep 10, 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 8, 2026
- Update frequency
- Daily
Now 1.59M af, 0% below the 5-yr median, 78% of capacity.
| Period | Current | Prior | Change |
|---|---|---|---|
| Week over week | 1.59M af | 1.61M af | -1.1% |
| Month over month | 1.59M af | 1.68M af | -5.5% |
| Year over year | 1.59M af | 1.62M af | -1.9% |
| vs 5-yr median | 1.59M af | 1.59M af | -0.3% |
| 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 Aug 25, 2026
New Don Pedro storage dropped to 1.63M af, down 6.6% over the month and 1% below the 5-year median, sitting at 80% of capacity. Week-over-week, the reservoir shed 1.4%.
Week of Aug 18, 2026
New Don Pedro storage fell to 1.65M af, down 7.3% over the past month, and sits 1% below its 5-year median. The reservoir holds 81% of capacity, down 2.2% from a year ago.
An earlier week
New Don Pedro fell to 1.67M af, down 7.6% over the month as summer drawdown continues. Storage is 1% below the 5-year median and running at 82% of capacity.
Week of Aug 13, 2026
New Don Pedro storage fell to 1.68M af, down 7.6% since early July. The reservoir sits 1% below its 5-year median and holds 83% of capacity.
About New Don Pedro Reservoir
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 20 major reservoirs this site totals each day, and one of several it tracks in the Tuolumne-San Joaquin basin. For the combined picture, western reservoir levels carries the storage of all 20 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 rather than water depth, so read the current figure against total capacity for how full the reservoir is, and 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.