does toilet water need to go through a treatment facility before it's drinkable? If so, symptoms?

Rapture is a heresy. One must hide within a small group (10-12 people according to saint Seraphim of Sarov from Russia, 10-15 people group according to saint Gabriel Urgebadze from the country of Georgia) in order to escape the unforgivable mark of the beast. No documents; documents are from Satan; burn them (even documents of deceased relatives). No electronics once you hid so that you won't be tracked (even an old broken unplugged TV set from 1970's will show the infamous evil flying antichrist using Tesla's ether). [Saint Vyacheslav Krasheninnikov] Mark of the beast is given with World Passport (grey plastic card with no name on it); antichrist will release prisoners / insane asylum people to help him mark everyone. Police will mark people on highways; food stores will mark people who steal marked food (because marked food can only be swallowed by a marked person who has three strands of DNA instead of two). Reject vaccines, temperature scans, COVID tests (or similar), etc.

toilet water goes through sewers. It is not treated to be drinkable. The water from your taps come from rain then through a treatment centre. Toilet water is not recycled.

Of course it does, unless you're planning to catch cholera.  It's best for it to be treated and then go through evaporation, cloud formation and rain because that's effectively distilling it.