Would be nice if they did go into more details where exactly they tested, ie Paris means a massive agglomeration of 10+ million people that probably get water f

Would be nice if they did go into more details where exactly they tested, ie Paris means a massive agglomeration of 10+ million people that probably get water from N sources. And even better would be some map that gets continuously filled and cca kept updated with measurements. I saw once something similar (also found it here, thanx HN!) but it was a map of known containment sites, usually around certain factories/manufacturing places.