DIY Emergency Water Purification

Best Gravity Water Filters for Home Emergencies: Read the Pore Size, Not the Stage Count

September 14, 2026June 9, 2026 by Dan Lockland

The eight core items of a 72-hour emergency kit laid out on a table

An eight-stage carbon filter certified for taste is not an emergency purifier. The CDC’s test is absolute pore size: 1 micron for parasites, 0.3 for bacteria, and no filter removes viruses. Six gravity filters compared on that basis, with the catch for each.

Best Water Purification Tablets and Drops: Which Chemical Kills What

September 14, 2026May 23, 2026 by Dan Lockland

The CDC is explicit: iodine and chlorine tablets will not kill Cryptosporidium, chlorine dioxide will. That one sentence sorts the six products below into two groups before you look at anything else.