Riccardo Zennaro, coordinator for the UN's Global Wastewater Initiative, previously told HuffPost that in the event of flood, you might not know whether your water has been contaminated by sewage or chemicals. Most likely, however, it's been contaminated by both. In this case, he recommends passive gravity water filtering systems to get the cleanest and safest water possible. This gravity fed water system, like all gravity systems, requires no electricity or running water to work. It has a capacity over 2 gallons and uses the process of reverse osmosis, in addition to two carbon filters, to effectively filter out a number of impurities.

Source: Huffington Post April 03, 2026 11:10 UTC