alt Hacker NewsCalifornia actually produced the most food of any state. :). But I know what you mean, the water is just as critical in the middle of the country as it is on the edges. Water is critical everywhere, and this problem is just going to get worse and worse.
California leads in the value of goods sold, because it produces a lot of relatively expensive agricultural products like almonds, avocados, tomatoes, etc. Additionally, it’s a larger state, so it naturally will inflate the totals. If you look at food staples, and at the amount produced by square mile, the Midwest is definitely the main food producer of the US.