Don Pedro Reservoir water level chart
By Michael, independent developer behind zovo.one. Latest CDEC month October 2026.
CDEC's latest monthly storage figure for Don Pedro Reservoir is 1,472,235 acre-feet, for October 2026, 73 percent of its 2,030,000 acre-foot capacity. It is the 24th highest of the 52 October figures from 1975 to 2026.
Where October 2026 sits in 56 years of readings
CDEC's latest monthly storage figure for Don Pedro Reservoir is 1,472,235 acre-feet for October 2026. That is 73 percent of its 2,030,000 acre-foot capacity.
The file holds 52 October figures from 1975 to 2026. This one is the 24th highest of them. The average October figure across those years is 1,313,428 acre-feet, so the lake holds 112 percent of its average for the month.
Across every month from January 1975 on, 266 of 622 months were lower than today. That is 43 percent of those months.
The record low and the record high
The lowest monthly figure since January 1975 is 303,949 acre-feet, in October 1977. The highest is 2,024,000 acre-feet, in July 1995.
CDEC lists 1974 as the year Don Pedro Reservoir first filled. So the ranks, the average and the record low on this page count months from January 1975 on. That boundary is ours, not CDEC's. The file itself starts in October 1970. Its lowest figure, 145,340 acre-feet in October 1970, comes from before that boundary, so the comparisons leave it out.
How to read this chart
The line is storage, the volume of water in the reservoir, in acre-feet. It is not the surface elevation. CDEC publishes storage as one figure per month back to the start of the record, which is why this chart uses it. The dashed line is the capacity CDEC lists for the reservoir. The dotted line marks January 1975, where the ranks start.
Want today's elevation and percent full rather than the monthly record? The Don Pedro Reservoir water level page carries the latest daily CDEC reading.
Questions about the Don Pedro Reservoir record
How far back does this chart go? To October 1970, the first month in CDEC's monthly storage file for station DNP. The file carries 673 monthly readings through October 2026.
Is Don Pedro Reservoir low for October? It is the 24th highest of 52 October readings, at 112 percent of the October average.
What is the lowest it has been? 303,949 acre-feet in October 1977, counting from January 1975.
How often does this page update? The build fetches the CDEC file again every day and recomputes each figure. A new month shows up once CDEC publishes it.
Where these numbers come from
Every figure on this page is computed in code from CDEC's monthly reservoir storage file for station DNP. The capacity and the first fill year come from CDEC's reservoir information page for the station. The build drops months that CDEC marks as missing. None of the numbers is typed by hand.
The same chart exists for 11 other California lakes. They are Shasta Lake, Lake Oroville, Lake Berryessa, Folsom Lake, Pine Flat Lake, Lake Isabella, Millerton Lake, New Melones Lake, San Luis Reservoir, Cachuma Lake and Casitas Reservoir. The California lake levels page covers every reservoir in CDEC's daily storage summary.
Levels are point-in-time readings and can lag real conditions. Confirm ramp and hazard status with the lake operator before heading out. Not affiliated with any government agency. Data is republished from public USGS, CDEC and USBR feeds.