Ignoring the zombie blood for a second (because you're absolutely correct) I'll approach your last question.
> how common is it for typically impotable water to have these type of compounds?
My gut feeling is, "not very... right now." The "right now" is pretty much the problem with the speculated water wars (though a bunch of the water in the Gulf of Mexico does contain those compounds).
With landfill's "impermeable" barriers becoming permeated and cholesterol medications, caffeine, birth control, and various other drugs remaining in the treated effluent from waste water facilities coupled with humanity's generally reckless disregard for consequences to its actions there's a significantly non-zero chance that fresh, clean potable water will become scarce in multiple developed locations worldwide.
On the other hand, it could very well be that as our understanding of bio-remediation increases and our utilization of passive and active purification techniques and/or technologies increases we'll keep from having that be a problem. Potentially, we'll even stop actively polluting our water supplies with industrial, agricultural and residential wastes to "save a buck."
Anyway, the watercone is great. They've tackled usability issues present in other solar distillation devices and for areas with access to water with high salinity, or biologically contaminated water (though, there is risk of cross-contamination when harvesting your purified water). It's just that solar stills aren't always a replacement for filters.
> how common is it for typically impotable water to have these type of compounds?
My gut feeling is, "not very... right now." The "right now" is pretty much the problem with the speculated water wars (though a bunch of the water in the Gulf of Mexico does contain those compounds).
With landfill's "impermeable" barriers becoming permeated and cholesterol medications, caffeine, birth control, and various other drugs remaining in the treated effluent from waste water facilities coupled with humanity's generally reckless disregard for consequences to its actions there's a significantly non-zero chance that fresh, clean potable water will become scarce in multiple developed locations worldwide.
On the other hand, it could very well be that as our understanding of bio-remediation increases and our utilization of passive and active purification techniques and/or technologies increases we'll keep from having that be a problem. Potentially, we'll even stop actively polluting our water supplies with industrial, agricultural and residential wastes to "save a buck."
Anyway, the watercone is great. They've tackled usability issues present in other solar distillation devices and for areas with access to water with high salinity, or biologically contaminated water (though, there is risk of cross-contamination when harvesting your purified water). It's just that solar stills aren't always a replacement for filters.