I am going to agree with dougwlkabout. This is dumbing it down for the masses. The CDC guidelines for wilderness purification:

https://www.cdc.gov/healthywater/drinking/travel/backcountry_water_treatment.html

are good enough for the backcountry and frontcountry alike. I even disagree with their 1 min boil times when all you need to do is get it above 140F, but whatever. As for chemical contaminants in the frontcountry, none of these are effective anyway.

2 filters, ability to boil, jug of bleach, tincture of iodine, and chlorine dioxide tablets, I think I have it covered after the stored water runs out.