Finally, I can be trendy!
When I'm at a restaurant and the waiter arrives and asks..."Would you prefer sparkling or still mineral water?" I no longer have to be branded as a plebian, one of the unwashed, uncultured and/or possibly just cheap types, as I have in the past (responding with the low-brow..."Actually, tap water is fine, thank you.")
Now I can say, "Thank you, but I prefer local water."
I can even give them the hairy eyeball for suggesting any right thinking human would insist on importing their water, complete with non-bio-degradable plastic or costly glass not to mention the diesel/gas costs for lugging the tonnage from whatever pure-sounding, exotic, or just plain expensively packaged product to my table.
I mean really! When fresh, local water is available (free of charge, I might add) bubbling from a tap RIGHT THERE in the restaurant. Their own private and locally grown pipe-fed spring. It doesn't get much more local than that!
And filled with locally grown minerals and other nutrients, each local water has its own individual and unique bouquet. That's what local is all about, isn't it?
(Add in as much of the rest of the pro-local verbiage as you choose).
Take my word for it, you are definitely on the moral high ground here.