Deport your illegals. You’ll save billions in subsidies and have all the water you will ever need.
And non-citizen legals. That includes the tech companies stop their games bringing in "necessary" green card workers.
Preaching to the choir.
Sorry, but if every illegal alien in California disappeared tomorrow, it would only make a difference of less than 1% in California's annual water use. Almonds and alfalfa, on the other hand, receive federal price subsidies, are largely exported, and between the two of them are responsible for fully half the water used in California each year.