The best tacos I ever ad were from a street vendor in Concordia Mexico. They caused no problems for me not anyone else in my group. I also spent a week in Mexico at the El Cid in Mazatlan. There were signs on the mirrors that the water was purified and was safe to drink. It was fine and I suffered no side effects from any of it.
“Twenty years from now you will be more disappointed by the things that you didn’t do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.“