Nothing is grown in San Mateo, or for that matter, on the islands. All of our good tasting, healthy fruits and vegetables are grown on the mainland or imported from another country - much from Chile.
My daughter and I call them 'ugly carrots' as they are not all the same size, shape and color. But the taste is beautiful. Some of the potatoes are like Yukon Gold which are very expensive in California. The melons are very sweet and juicy.
So, relax, enjoy food the way god intended it to.