Pristine tablets are effective against bacteria, virus and giardia, within 30 mins. The risk of crypto is real so best to have some high certainty of the water source first
For filters, the EPA took “worst case” water (raw sewage) and determined the needed filter capabilities as follows:
• 99.9999% of Bacteria
• 99.9% of Protozoa (cysts)
• 99.99% of Viruses
These standards are the law for municipalities in the U.S. that deliver public drinking water.
The Platy quickdraw filters to 0.2 microns. 99.9999% of bacteria and 99.9% of protozoa
Gear Skeptic concluded that the Sawyer’s 0.1 micron is only a significant risk reducer if you spend months on trail drinking junk water. Some cite the CDT. When I talk with CDT through hikers they tell me that the perceived prevalence of raunchy cow water is vastly overstated.

