South-of-Delta wildlife refuges (Level 2 supply) received a final allocation of 100 percent of contract supply for 2025, an above normal water year. Across 2011 to 2025 the class averaged 94 percent, from 65 percent in 2014 to 100 percent in 2011, 2012, 2013 and 9 other years.
How often did the class get its full supply?
In 12 of the 15 years the allocation reached 100 percent, and in 0 it was zero. SWP Table A averaged 44 percent over the same years, so the two classes moved apart; the allocation rules treat contract types differently by design, and exports at the Delta pumps serve both cities and farms.
Year by year
| Water year | Kind of year | Final allocation, percent | Delta exports that year (MAF) | Exports, percent of inflow | Days a rule held exports | Days with no surplus outflow |
|---|---|---|---|---|---|---|
| 2011 | wet | 100 | 6.68 | 19.4 | 336 | 29 |
| 2012 | below normal | 100 | 4.97 | 34.9 | 321 | 45 |
| 2013 | dry | 100 | 4.27 | 29.4 | 325 | 40 |
| 2014 | critical | 65 | 2.04 | 27.0 | 257 | 108 |
| 2015 | critical | 75 | 1.94 | 20.8 | 310 | 55 |
| 2016 | below normal | 100 | 3.51 | 22.1 | 327 | 39 |
| 2017 | wet | 100 | 6.46 | 11.6 | 339 | 25 |
| 2018 | below normal | 100 | 4.61 | 29.8 | 353 | 12 |
| 2019 | wet | 100 | 5.34 | 16.1 | 313 | 52 |
| 2020 | dry | 100 | 3.66 | 31.8 | 299 | 67 |
| 2021 | critical | 75 | 1.65 | 23.4 | 254 | 111 |
| 2022 | critical | 100 | 2.19 | 24.1 | 292 | 73 |
| 2023 | wet | 100 | 5.39 | 17.4 | 294 | 71 |
| 2024 | above normal | 100 | 4.39 | 19.3 | 313 | 53 |
| 2025 | above normal | 100 | 4.96 | 21.2 | 294 | 71 |
MAF = million acre-feet.
How this supply measures against others
The 2025 Delta exports of 4.96 MAF that carried this class's supply, together with every other south-of-Delta class, were 1.1 times California's 4.4 million acre-foot basic apportionment of the Colorado River under the Boulder Canyon Project Act of 1928.
Frequently asked questions
What was the South-of-Delta refuges allocation for 2025?
100 percent of contract supply, announced as the final figure for the year by the Bureau of Reclamation.
What is a typical South-of-Delta refuges allocation?
Over 2011 to 2025 the final allocation averaged 94 percent and reached 100 percent in 12 of 15 years.
Is an allocation the same as a delivery?
No. An allocation is the share of contract supply that the project tells its contractors to expect for the year. Delivered volumes are recorded separately by each project.
Explore on the toolkit: allocation history, allocations announced beside exports realized, which counties this class serves.