As a practical matter, no, its not freely available. There is a reason why no one knows the law, and its not because no one tries, but because their efforts to know the law that binds them are actively thwarted by its publishers.
It is available online, but its unusable for the layman due to ridiculously bad design. You must agree to a contract to use it ("terms of use", "license") and promise never to repeat what you read. Purposely bad design in my opinion. Its 30,000 sections of regulations we're talking about here (there's a further 150,000 sections of California law, 50,000 sections of federal law, and 30,000 sections of federal regulations), and you only know it doesn't apply after you read it. Its javascript-based and uses session cookies, so if you take longer than 5 minutes to read a 30 page section with a bad layout that uses intensely complex verbiage, the next click will "close the book" in your face, and if you have no idea where you were, well, tough luck, there's always prison. If you try and open multiple windows, say, to read another section which is referred to, each window will interfere with each other. (Even trying will likely close the book in your face.) Each click is unbearably slow to load. (29,999 bottles of beer on the wall, 29,999 bottles of beer, take one down, can't pass it around, 30,001 bottles of beer on the wall.) There is no way to give a permalink to your grandma or on your blog, because there are no permalinks. Grandma will have to try and navigate the horrible website herself, and when she likely fails, well, tough luck, there's always prison.
It is available as bulk data on CD-ROM (in California) for a significant price, on the order of $3000 per edition. Did I mention it changes almost constantly? Obviously, no permalinks for your blog.
California is better than most in that the government was sued and forced to release the statutory law on the web.[1] Other states are not so lucky.
[1] http://maplight.org/pr_lawsuit