Water scarcity

I have often thought of a desalination plant but the energy costs are huge. Zihua would need the resources to build a huge solar farm to power that. Then there is the more obvious option of building a damn on one of the more consistent rivers that flow down from the mountains. Both require serious capital investment.

We've heard, over the years, that Zihua's "pipa" water comes from Pantla. It would be interesting to know if it comes from a river, or from an aquafer.