Water Purifiers

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

The best water purifiers, reviewed and curated by the Trailspace community. The latest review was added on June 22, 2019. Stores' prices and availability are updated daily.

Recent Water Purifier Reviews

SteriPEN Adventurer

rated 3.5 of 5 stars Unlike mechanical filters this kills bacteria, protozoa and viruses, but it will not filter out debris, so it is best used with clear water. Also requires batteries. I have used the Steripien Adventurer for several mountain trips where I was guaranteed running water. I was attracted to it because, unlike other means of filtration, it also kills viruses. The idea is simple but genius—UV light disrupts the DNA of the nasties and destroys them and/or disrupts their reproductive potential. That said,… Full review

SteriPEN Classic UV Water Purifier

rated 5 of 5 stars SteriPEN is an excellent handy tool for the right applications. Extremely easy to use, easy to carry, fits in a small pocket or attaches to one's belt or backpack strap, and can be used when out camping, but also in a restaurant in a cup of water, and in many water bottles, one can turn the bottle upside down, with the pen acting as a plug, while doing sterilization. It appears to have been developed for military application, to my memory, and that's a pretty good recommendation as to efficacy. … Full review

CamelBak All Clear

rated 5 of 5 stars I lived in Mexico in a town that got its water from a lake. The water was not safe to drink so I used the Camelbak All Clear. I never got sick. I also use a Katadyn Pocket Filter when I need to get rid of all the solids. I have traveled to Mexico and Peru where the water quality is less than superb. If you drink the water that is untreated, you will get Montezuma's Revenge. I also have a carrier for the bottle. I am glad I bought this unit as it sure saved me a lot of running to the bathroom. Full review

MSR Guardian Purifier

rated 4.5 of 5 stars It's a very high quality portable hand purifier, with a high level of filtration (small enough for viruses) and has fast flow rate, as it pumps very quickly. It also has a long lasting filter and is the only portable hand purifier that is truly freeze resistant. Best for backcountry camping in remote areas, especially if the water is very unsanitary. Would definitely recommend and is well worth the price. MSR has made some bold claims on what this product is capable of and as far as I can see the… Full review

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

user rating: 5 of 5 (6)
MSR Guardian Purifier
$262 - $349
user rating: 5 of 5 (2)
Grayl Ultralight
user rating: 4 of 5 (26)
SteriPEN Classic UV Water Purifier
user rating: 4 of 5 (9)
SteriPEN Adventurer Opti
$80 - $99
user rating: 4 of 5 (1)
Platypus Meta Bottle + Microfilter
$37 - $49
user rating: 4 of 5 (1)
Potable Aqua Pure
$100 - $119
user rating: 3.5 of 5 (1)
SteriPEN Ultra UV Water Purifier
$88 - $109
user rating: 3.5 of 5 (1)
SteriPEN Classic 3 UV Water Purifier
$64 - $79
LifeStraw Steel
SteriPEN Aqua Water Purifier
$50 - $64
SteriPEN Pure+
$72 - $89
SteriPEN Quantum Rapid Purification System
$56 - $63
First Need Base Camp
LifeStraw Family 1.0
user rating: 5 of 5 (13)
First Need Deluxe Water Purifier
user rating: 5 of 5 (4)
First Need Deluxe Water Purifier XL
user rating: 4.5 of 5 (8)
CamelBak All Clear Bottle/Inline Water Filter / Purifier
$99 MSRP
user rating: 4 of 5 (14)
SteriPEN Adventurer
$129 MSRP
user rating: 4 of 5 (3)
SteriPEN Traveler
user rating: 3.5 of 5 (13)
MSR Miox
$140 MSRP
user rating: 3.5 of 5 (7)
MSR SweetWater Purifier System
$100 MSRP
user rating: 3.5 of 5 (2)
AquaStar Plus
user rating: 3.5 of 5 (1)
SteriPEN Sidewinder
$100 MSRP
user rating: 3 of 5 (1)
Grayl Quest
$80 MSRP
user rating: 3 of 5 (1)
SteriPEN Journey System Pack
user rating: 2.5 of 5 (1)
SteriPEN Freedom
user rating: 0.5 of 5 (1)
Potable Aqua Traveller
user rating: 1 of 5 (4)
SteriPEN Journey LCD
$130 MSRP
Sawyer Point Zero Two Purifier with Bucket Adapter
SteriPEN Defender Water Purifier
SteriPEN Protector Pack
SteriPEN American Red Cross Ultralight Purifier
SteriPEN Traveler Mini
SteriPEN Quantum Water Purifier
HTI LifePack
$35 MSRP
HTI SeaPack Emergency Desalinator
$75 MSRP
Grayl Legend
SteriPEN Emergency
SteriPEN Protector Opti
SteriPEN Journey LCD System Pack
SteriPEN Protector
SteriPEN Adventurer with Solar Charger
First Need Trav-L-Pure
HTI Expedition
SteriPEN Ultralight UV Purifier
SteriPEN Adventurer Opti with Solar Charging Case
HTI X-Pack
$64 MSRP
Puralytics SolarBag 3L
$99 MSRP
user rating: 4 of 5 (7)
Katadyn Exstream XR Bottle Purifier
user rating: 3.5 of 5 (3)
Katadyn Exstream Bottle Purifier