Not a chance.
To make beer the water HAS to be 100% pure. If the water has ANY impurities it won't be beer.
So it doesn't matter to what third world pit hole you may visit...you can always drink the beer.
The best known and most famous brewing law is the Reinheitsgebot.
It said that beer should only be brewed from barley, hops and water. Thanks to the regulation, Bavarian beers then became leaders among their peers. Thus other lands of Germany also enforced the regulation.
Not true of course. Otherwise, beer could not have been made until relatively recently. Even water from high mountain springs contain biological contaminants.
It seems to be an acknowledged fact that the best beer in the world is made at Munich in Bavaria. Now it is an equally notorious fact that the water in Munich is very bad—abominable—I can tell you from actual experience. But the yeast cell finds in this impure water the nitrogen and mineral salts it needs for its health and strength, and so we assert that bad water is a necessity in the brewing of good beer— sort of paradoxical.
Q. I would like to know whether you have ever had occasion to make analyses of beer, and if you can tell us something about the impurities of beer?—
A. I have made a number of analyses of beer, but I never have found anything particularly injurious in beer, although I have been told and frequently read of adulterations of beer which are undoubtedly injurious. Some of the foreign beers have been colored with picric acid.
Q. Colored after they come here or before?—
A. No: colored abroad. There is a great deal of beer made with impure water, which would come under the head of an adulteration.
Q. Have you learned that in your investigations?—
A. Yes.
Some breweries are even making beer with "gray" water: Could Craft Breweries Help Lead the Way in Water Conservation? They say the gray water has been treated.