Originally Posted by BV

If the ice is clear most likely it will be ok. Many places in mexico purify the ice. I spent a few months in mexico and learned to ask: hielo purificado?

FYI: The reason the water is bad is that most places in Mexico have a low pressure water supply from the city municipality. So most places have a huge holding tank on their roof that this low pressure supply fills up and then it is then pumped from their under pressure to the rooms or where ever.

When you fly in to the airport you will see all these tanks on the rooftops. We all know that water gets stagnant and microorganisms start to grow. These are the fuckers that will give you the squirts.