The 7000 is a year .Ffirst few years it was around 6000 if I recall .Volunteer program was started several years before the Toilets were removed and the carryout was very high in the 90% range ,it is easy to find reference to systems that work ,but in the real world of no funding part-time rangers and no way to protect the rangers from some if not major health risk,lack of a facility to shower or clean after servicing a backcountry toilet was a major issue.
Some of the bags are a form of protest against the system ,some are just forgotten or not found and then as mentioned some people are just ......
The water is sampled on a regular schedule and as far as I know no issues,I drink the water from the stream but never from Trailcamp or the stream out of trail camp,all water on the North Fork.I never use swimming pools ,hot tubs,saunas,hot springs or drink from public fountains.On that note you get that bottled water delivered to your door it sits out how long?how many rodents,dogs,cats and whatever you can imagine has been near that bottle?
Another thought while I was in Japan the ice was placed on the street in front of the bars,Sailors would go out side to take a peepee well you know Sailors,They are a zaney bunch.
So the Whintey water should be fine if any concern boil in the vessel you plan to drink out of and add a drop of bleach,stay clear of daycare centers and don't share or drink from a public drinking cup like the old days.