Is holy water still holy if it's tainted with pesticides and herbicides?

This could come straight from The Onion….but it’s not. It’s from NPR, CNN, NYPost, you name it so it’s for real. When I read this I laughed so hard I was wiping the tears from my eyes!

A Roman Catholic church in rural Louisiana came up with the idea of filling a crop dusting plane with holy water ”and letting the sanctified liquid mist an entire community. ”

But I wonder how well they cleaned the tanks before they poured holy water in them?

When I was growing up Mom had a crucifix on the wall. It could slide apart to reveal a little compartment that held a piece of cloth and a vial of holy water. One day I got brave enough to open that vial of holy water…and it was empty. It fascinated me to think that over the course of decades it somehow evaporated out.