Water Purifiers

The best water purifiers, reviewed and curated by the Trailspace community. The latest review was added on October 14, 2018. Stores' prices and availability are updated daily.

Need help getting started? Read our four-part guide to backcountry water treatment:
Part 1: Proper Hydration
Part 2: Keeping Your Water Supply Safe
Part 3: What’s in Backcountry Water?
Part 4: Methods for Making Water Safe

Recent Water Purifier Reviews

Grayl Ultralight

rated 5 of 5 stars I purchased this water filtration bottle primarily to take canoeing, for day trips and canoe camping outings. It is small, easy to carry, and can provide clean drinking water in a short period of time. It is really tough to use in the canoe, due to pressure needed, but a quick stop off at shore and I can get clean water quickly. It is also handy to use when hiking, as it fits nicely into backpack bottle pockets.                                Packaging as I purchased… Full review

SteriPEN Journey LCD

rated 2 of 5 stars I have owned the Steripen Adventurer for about a decade, and it has performed very very well, with good battery life. With the Journey LCD, I had the same battery probs described by the other reviewers. My conclusion is that the Journey somehow drains batteries when not in use. I had a headlamp like that—it's now in the landfill. By flipping one battery when not in use (so it couldn't make a circuit), I seemed to get a little more life out of it. I do like the LCD display, but I am back to using… Full review

Grayl Ultralight

rated 5 of 5 stars Convenient, lightweight, perfect for short trips. For short trips this thing is perfect! If you're going to be out for a week or less this will suffice so long as there is a freshwater source in the vicinity. Super easy and fast to use. Great for on the go! Used it while in an endurance race down a river in Florida for two days. Worked perfectly! It now replaces my Berkey sport bottle. Full review

SteriPEN Adventurer Opti

rated 4 of 5 stars I’m sure someone out there could prove me wrong, but the SteriPen Adventurer Opti is a foolproof tool for purifying water in the backcountry. Usage and Why I Bought It:After borrowing a friend’s SteriPen Adventurer Opti during a three-day trip, the ease of use, compact size, and effectiveness were the reasons I purchased my own. It’s been a handy little companion during many hiking and canoeing trips, making the chore of preparing water for safe consumption much less daunting (than pumping)… Full review

MSR Guardian Purifier

rated 4.5 of 5 stars Great product and would recommend to everyone. With its ease of use, the MSR Guardian Purifier is great for all outdoor enthusiasts and survival preppers. The product produces crystal clear and very good pure tasting water. However, the filter can be difficult to dry and after a while of no use it can get a moldy smell. Full review

MSR Guardian Purifier

rated 5 of 5 stars The MSR Guardian water purifier is an amazing piece of kit. It pumps water in both directions which makes it fast and efficient. I really loved the new approach to getting the hose into the water, so that the intake of water comes from the top of the water source and not from the bottom of the lake like previous water filters. I used this filter during a multi-day canoe and hiking trip in the Yukon. The double pumping ability of this pump put the MSR Miniworks to shame and it became the go-to filter… Full review

MSR Guardian Purifier

rated 5 of 5 stars Simply the best water filter in the world. I have used water filters for decades. My first one cracked when it froze. I have used two MSR MiniWorks with great results. It was great to be field repairable and field cleanable BUT filtering water was slow and required a lot of effort, usually at the end of a long hard day! Enter the MSR Guardian! Less than half the effort of the MiniWorks and at least twice the speed. For these two features alone this filter would be the winner but there is sooo much… Full review

MSR SweetWater Purifier System

rated 4 of 5 stars Have been using this water filter/purifier for 6 years while elk hunting. Had to use filter brush only at the beginning of each trip at home. I generally filtered 6 total liters of water at one time to avoid this duty daily. I really like the unit and always use the suction hose pre-filter. I have been using the MSR Sweetwater for 6 years while elk hunting. I always use the brush, at home before I leave for a hunt. Usually pre-filter 6 liters in camp right away, so I don't have to filter daily. Full review

CamelBak All Clear

rated 4.5 of 5 stars The product is very innovative and easy to use. The battery life is never a problem and this unit is utilized by two on the trail. Having a top with the filter gives the best of both worlds with UV and filtration. Nice to have the solution from one company. This unit make very quick work of hydration. Fill the bottle, hit the button, and then shake gently for a short time. How easy is that? I can purify the water and change heads in under 2 minutes. It sure beats having to squeeze through a filter… Full review

In order to show you the most relevant gear, we have omitted some older, unreviewed products.

If you like, you can view the list with the older products included.