Best Backpacking Water Filters of 2025
Everyone exploring the backcountry needs water, but staying hydrated is not as simple as drinking straight from streams and lakes. To protect against protozoa, bacteria, and even viruses, there are myriad water filtration and purification systems built specifically for backpacking (many options on this list are great for day hiking, trail running, and travel, too). We've been testing water filters on backcountry adventures near and far since 2018, and our 19 current favorites below include everything from ultralight squeeze filters and chemical drops to pumps and large-quantity gravity filters. For more background information, see our comparison table and buying advice below the picks, along with details about our testing process.
Continue reading to learn more about the best water filters, written by Maddie Downie.
May 29, 2025
Jenny Abegg and Maddie Downie
Jenny Abegg
Expertise & Background
Topics of Expertise: Climbing, mountaineering, trail running, hiking and backpacking, backcountry skiing
Education: Masters in Education
Years of Writing: 9
Years of Gear Testing: 9
Certifications: PCGI certified Lead Guide
Club or Association Memberships: American Alpine Club, Access Fund, Austrian Alpine Club
Previous Publications: Climbing Magazine, Alpinist, Sidetracked, Adventure Journal, REI Co-op Journal
Chunguza Maudhui Zaidi
Majina ya Vyombo vya Habari
The Sawyer Mini is super lightweight, fits in your pocket, and filters up to 100,000 gallons of water.
Majina ya Vyombo vya Habari
Sawyer’s picaridin spray works up to 12 hours, and the company’s picaridin lotion is effective up to 14.
Majina ya Vyombo vya Habari
The Sawyer Squeeze Water Filter earns our top pick for its unbeatable mix of weight, longevity and versatility.
Kutoka kwa kikosi
Mazungumzo ya Campfire na jamii yetu, kutoka kwa Wanachama wa Squad na Mabalozi kwa Washirika wa Brand na timu ya Sawyer.
