Reservoirs
Near normalNew Don Pedro Reservoir water level
Live reservoir storage and water level in Tuolumne-San Joaquin basin, California
Data through Oct 15, 2026 · source last checked Oct 17, 2026 · page revised Oct 17, 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
- Oct 15, 2026
- Update frequency
- Daily
Now 1.51M af, 2% above the 5-yr median, 74% of capacity.
New Don Pedro held 1.51M af on October 15, down 3.7% from a month earlier. Storage sits 2% above the 5-year median and 74% of capacity.
| Period | Current | Prior | Change |
|---|---|---|---|
| Week over week | 1.51M af | 1.51M af | -0.4% |
| Month over month | 1.51M af | 1.57M af | -3.7% |
| Year over year | 1.51M af | 1.54M af | -2.3% |
| vs 5-yr median | 1.51M af | 1.47M af | +2.4% |
| Measure | Value |
|---|---|
| Latest reading, Oct 15, 2026 | 785.01 ft above sea level |
| Change from a week earlier | -0.6 ft |
| Change from a year earlier | -3.42 ft |
| 5-yr median for the date | 781.61 ft |
| Below full pool | 44.99 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
An earlier week
New Don Pedro storage stands at 1.51M af, 2% above the 5-yr median at 74% of capacity. The reservoir fell 3.8% over the month. Year over year, storage is down 2.4%.
An earlier week
New Don Pedro holds 1.51M af, 2% above the 5-year median. Storage fell 3.9% over the month, with the week down 0.5%. The reservoir sits at 74% of capacity.
Week of Oct 6, 2026
New Don Pedro storage fell to 1.52M af, down 4.6% on the month. The reservoir sits 1% above its 5-year median and holds 75% of capacity. Year-over-year storage is down 2.7%.
Week of Sep 29, 2026
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.
About New Don Pedro Reservoir
New Don Pedro Reservoir's water level is 785.01 feet above sea level as of Oct 15, 2026, 44.99 feet below full pool (830 feet), with 1.51 million acre-feet in storage (74% of capacity). That is 0.6 feet lower than a week earlier and 3.42 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.