Jews poisoning wells
A medieval trope or stereotype of sorts mentioned in the Protocols of Zion
Jews are typically city people or city dwellers who would think of themselves as "citizens" with respect to the Holy City, Jerusalem. Christianity as such traditionally exists mostly outside city limits, as Jesus Christ suffered and died and rose again without the gates according to the Bible.
City Hall has been synonymous with Jews living and working in business and banking districts since medieval times in Europe. And when people accused "Jews" back then, they were accusing city people in general, as there was always a substitute atonement for Jews in a certain manner of speaking.
So the complaints of "Jews poisoning wells" in medieval Europe and Russia (before the German Holocaust and the Russian pogroms) were really only meant to be interpreted as generic complaints about the quality, supply and cost of city water. The term "pogrom" may be a corruption or dialectical variant of "program." Hollerith punched card tabulating machines were then used to compile vital statistics in large cities, and people highly resented being tracked and identified by the government when the computerized equipment was first introduced.


It's "the nations" (or "goyim") and not "the Jews" taking the blame in this CNBC article. Nevertheless all attacks on domestic water supply remain a concern.


Conspiracy theories or not, some healthy skepticism of source, quality and cost of domestic water supply (urban or rural) is warranted and justified.