Of course, undisinfected water can make us sick, if it contains pathogens. Is there a meaningful link to 'climate change',  No!  There are contaminated waters in the cooler north as well as the warmer south, and plenty of safe waters in both. This is how a researcher gets  papers cited in the non technical press, and such speculation perhaps increases some grant opportunities.  Millions in the US alone drink undisinfected groundwater, and are safe and  healthy, if the source is protected from contamination sources.

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Of course, undisinfected water can make us sick, if it contains pathogens. Is there a meaningful link to 'climate change',  No!  There are contaminated waters in the cooler north as well as the warmer south, and plenty of safe waters in both. This is how a researcher gets  papers cited in the non technical press, and such speculation perhaps increases some grant opportunities.  Millions in the US alone drink undisinfected groundwater, and are safe and  healthy, if the source is protected from contamination sources.