This is fascinating enough to be potentially real. And in No Time to Die we were releasing designer poisons that only kill when specifically activated, so for speculation's sake it's not impossible to say that some binary-poison could be released in water that affects spiked people disproportionately. However, I'm jaded enough that I'm trusting very little news about this fourth calendar year of coronae.

Your other theory is that the virus itself may cause the water to change, and this is what happens with flushed fluoride, it stays in circulation. If shedding is real then water becomes gradually more infective; compare Revelation especially chapter 16. Presumably good filters can handle it, but there's some leeway for speculation there too.

This is what the anons are best at, wading through a morass of info and disinfo and getting to answers. I wasn't liking the first reports, but if we attribute it to Peters and Ardis going too fast and the factual basis getting drowned out, then we might get a better second wave.