All Sawyer water filters are .1 microns absolute and will remove harmful bacteria, parasites, cysts, and any other particulate or biological pathogen larger in size.

Floodwater

If you are in a flood affected area, surface water can absolutely be contaminated with sewage or other contaminants, so exercise caution where you are sourcing your water.

Bacteria and Sewage
The primary contaminant in floodwater is bacteria from sewage and other decaying organic matter. Our filters remove 99.99999% of bacteria, including those common in floodwater, like Escherichia coli (E. coli), Salmonella, Campylobacter, and Leptospira.

Gasoline and Fuels

Contaminants like gasoline or other fuels are lighter than water and will rise to the surface so if this is your only water source, draw your water 12" below the surface.  If you still have concerns about taste, smell, or discoloration, go lower or seek alternative water options.

Viruses

Viruses are not typically found in water in these situations. Viruses are typically airborne or need warm water and/or a host to survive.

Saltwater

Sawyer filters are not for use with salt water, proceed to fresh water sources like lakes, streams, etc.