Teaching Of Old Water

I completed the first part of teaching of old, but now I'm suppose to get clean water from somewhere near Bucie. The wiki is very vague so I was wondering if there is a specific spot to get the water or some well that I need to go to?

 

you have to go upstream towards Bucie and there will be some particle effects that indicate which area to collect water from. There's also dialogue that appears when you charge the prismarine thing.