It's worth noting that almost all decaffeinated coffee is made using water as the solvent. Even 30 years ago this was true.
"Like regular coffee, decaf coffee begins as green, unroasted beans. The hard beans are warmed and soaked in liquid to dissolve and remove the caffeine in one of four ways: using water alone, using a mixture of water and solvents (most commonly methylene chloride or ethyl acetate) applied either directly or indirectly, or using water and “supercritical carbon dioxide.”"
Even our local coffee roaster replied and said they only use Swiss water process on their more expensive organic beans - the rest of their lineup uses MC.