Sulfite-free does exist

[TimP]

The TTB regulations call for testing the free sulfites.
Our appellation is Ozark Mountain, and our vineyards are about 15 miles southeast of Jefferson City, MO.
We do have to add some tartaric acid to lower pH. I know in warmer climates the issue is sometimes too low pH (that is, too acidic). It is a little more difficult to raise the pH than to lower it, but have never had that problem.