I suppose to look at it in a different way...if you are just concentrating levels of minerals etc. that are in the water to begin with. Drinking 1 glass of wastewater would be like drinking 4 out of the tap(just a hypothetical number) as far as "contaminates" go. I'm pretty confident I could drink as many glasses of water out of my tap without it harming me.
As long as it tastes ok I would be fine with drinking the waste water. Guess I've never tested TDS of waste water either...anyone got any numbers?
Your logic is flawed, all contiminants in drinking water have "safe levels" if they are concentrated to high they are "unsafe" it's not like dinking more glasses. If that were the case there would be no such thing as safe concentrations, and unsafe concentrations.
In your hypothetical example the concentration changed from 25 ppm to 100ppm or 250ppm to 1000ppm. If the safe level were 300ppm the danger level were 500ppm, and the fatal level were 800ppm you went from potable to deadly. I doubt any contaminents would fall into this category, I'm just illustrating the flaw I see in your logic. It would be kind of like saying "I see no problem with a pollutant level 10 times the target range in my aquarium, it's just like have an aquarium 10 times larger". Yes, the numbers add up, but the effect is much different. Many people, confuse quantity with concentration...they are not interchangable?
You are probably correct, I doubt any contaminents go from safe to a problem at 4 times the level, but it is not the same as drinking 4 glasses of water instead of 1.
Why would anyone want to drink the waste water anyway? LOL