10 Best Backpacking Water Filters of 2020

How to Choose a Backpacking Water Filter or Purifier

In order to find the right water filter or purifier for our backcountry needs, we must first understand what they do and how they work. But, if you already know all of this information and are just here to see the best products on the market, scroll on down to the good stuff.

Now, many natural water sources contain microscopic organisms that can cause illness in humans. Most water filters intended for backcountry use will remove bacteria and protozoa, including giardia and cryptosporidium from these water sources. This is usually sufficient in the United States, Canada, and the UK. Viruses, often found in international water sources, are hard to remove because they are so small. Don’t worry.. There is a way! Finer grained filters called purifiers are needed to remove them. They also can be neutralized with chemical purification agents such as chlorine dioxide or ultraviolet light.

There are a wide number of different water filter and purifier types available. Unfortunately, none of them are full-proof or perfectly suited for all locations and environments. They also differ in ease of use, weight, the length of time it takes for them to process water, and whether they’re good for solo or group use. It’s also a good idea to consider its size based on the space you have in your backpack. Here’s a brief summary of the different types and their strengths and weaknesses, with several examples to give you an idea of what is at the top of the market these days.

 

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Squeeze Water Filters

Squeeze filters are single-stage filters that are good for removing bacteria and protozoa, but not viruses. They’re best used with clear water sources that are low in particulates and suspended organic matter to prevent clogging. Processing speed depends on the size of the “dirty” water bottle or squeeze bag coupled with the filter and how much pressure the user exerts to push water through it. However, squeeze filters typically slow down with use and must be back-flushed with a cleaning syringe regularly to maintain their flow rate. Some examples:

• Sawyer Squeeze Water Filter System
• Katadyn BeFree 1 Liter Water Filter System

Gravity and Inline Water Filters

Gravity water filters make it possible to process larger quantities of water at once using the power of gravity. A large water reservoir, called “the dirty bag” is hung from a tree with a hose leading to a water filter. The output of the filter flows out another hose to a clean reservoir, called the “clean bag.” A squeeze style, single-stage filter is typically used. Gravity filters are good for couples and small groups. Ideal to get going while setting up and breaking down camp so the water is ready for you by the time you’re ready to cook or hit the trail. An inline water filter uses a similar setup, but the user sucks on the output hose rather than running it to a clean bag. Some examples:

• Platypus Gravity Works 4 Liter Water Filter System
• Katadyn BeFree 3 Liter Gravity Water Filter System
• Sawyer 1 Gallon Gravity Filter System (designed for inline filter use)

Bottle and Straw Water Filters

Bottle and straw filters usually use the same single-stage, hollow fiber filters used by squeeze, gravity, and inline water filter systems. The user sucks water stored in a bottle or directly from the water source through the filter, rather than transferring it to secondary storage. They are best used by individuals in places where water is abundant. Some examples:

• Lifestraw Flex Water Bottle Filter
• Lifestraw Water Filter

Pump Water Filters and Purifiers

Pump water filters filter out bacteria and protozoa, while pump water purifiers can also remove viruses. They have hand pumps that force water through the filter and out to secondary storage for future use. While pump filters do require some elbow grease to operate, they usually filter water quite quickly and are suitable for use by couples as well as individuals. Most have a pre-filter at the end of the hose that you drop into the water source to remove particulates and organic matter. They can be cleaned and replacement filters are usually available. Some examples:

• MSR Guardian Water Purifier
• Katadyn Hiker Pro Water Filter

Chemical Water Purification

Chemical water purifiers are available in tablet or liquid form. The best chemical ingredient is chlorine dioxide, which has virtually no taste or color and kills bacteria, protozoa, and viruses. Chemical purification is best used by individuals rather than couples or groups because it takes anywhere from 15 minutes to 4 hours to fully purify water, far longer than other methods. While it is very lightweight, it is relatively expensive when compared to other methods. Many hikers carry chlorine dioxide as a backup to a second primary filter or purification method, as a result. Some examples:

• Katadyn Micropur Water Purification Tablets
• Aquamira Water Treatment Drops

Ultraviolet Light Water Purification

Ultraviolet Light is an effective form of water purification that neutralizes bacteria, protozoa, and viruses. It is best used with clear water since it doesn’t remove any particulates or organic matter. While UV purification is relatively fast, it’s not good for processing large quantities of water. It also depends on working batteries, which can run out of power. Some examples:

• Steripen Ultra Water Purifier
• Steripen Adventurer Opti Water Purifier

 

 

Make / Model	Type	Lifetime (in Liters)	Weight
1. Sawyer Squeeze	Squeeze Filter	100,000	3 oz
2. Katadyn BeFree	Squeeze Filter	1,000	2.3 oz
3. Aquamira Purification Drops	Chemical Purification	120	2 oz
4. Platypus Gravity Works	Gravity Filter	1,500	11.5 oz
5. Katadyn Hiker Pro	Pump Filter	1,100	11 oz
6. Steripen Ultra	UV Purification	8,000	4.8 oz
7. Grayl Geopress	Squeeze Filter	250	15.9 oz
8. MSR Miniworks EX	Pump Filter	2,000	17 oz
9. MSR Trail Shot	Pump Filter	2,000	5.2 oz
10. MSR Guardian	Pump Purifier	10,000	17.3 oz

 

 

 

 

 

 

 

 

1. Sawyer Squeeze Water Filter

 

 

The Sawyer Squeeze Water Filter System  includes the Sawyer Squeeze Filter, two 32 fl. oz. pouches, a cleaning coupling and additional accessories for gravity and inline use. Like the Sawyer Mini, you can drink directly from the Sawyer Squeeze but most people squeeze untreated water through it from a soft bottle to a clean container (Tip: This filter will also fit on Smart Water and Life Water bottles as well). The filter uses a hollow-fiber membrane filter that removes 99.99999% of all bacteria, such as salmonella, cholera and E.coli and removes 99.9999% of all protozoa, such as giardia and cryptosporidium. The filter itself weighs 3 ounces.

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2. Katadyn BeFree Water Filter

 

The Katadyn BeFree Water Filter can be used as a squeeze filter or hung for group use as a gravity filter if you purchase the 3L version. It has a 0.1-micron microfilter that is EPA tested to remove protozoa (99.99%) and bacteria (99.9999%). It can filter water up to 2 liters per minute, which is very fast for this style of filter. An integrated wide-mouth soft bottle, available in three different sizes, 0.6L, 1 liter, and 3 liters, is easy to fill in streams and folds up compactly when not in use. Weighing 3.5 oz total, the filter alone has a life expectancy of 1000 liters.

 

 

3. Aquamira Purification Drops

 

 

Aquamira Water Treatment Drops use chlorine dioxide (used in municipal water treatment plants) to kill 99.9% of bacteria, viruses and cysts, including cryptosporidium and giardia. Each package of Aquamira contains two bottles, Part A and Part B, which you mix together before treating your water. The drops are effective in clear, muddy, warm and cold water and have a shelf life of five years, making them an excellent solution for international travel, hiking, backpacking, and emergency preparedness. Each Aquamira package contains enough drops to treat 30 gallons of water. Many people carry Aquamira as a backup in case their water filter breaks or for purifying several liters of water at once.

 

 

4. Platypus Gravity Works

 

The Platypus Gravity Works water treatment system is a gravity filter that includes two x 4 liter water reservoirs, a water filter, and connecting hoses arranged in a gravity filter configuration. It’s ideal for filtering water for couples or families when you need to filter a large quantity of water quickly. The Gravity Works filter physically removes particles, protozoa, and bacteria down to 0.2 microns in size, including giardia, salmonella, and cryptosporidium. Quick-disconnect valves and a hose clamp make cleaning easy. Filtration speed is over 1 liter per minute and requires no effort once the “dirty” bag is hung. The expected filter lifetime is 1500 liters of water. The entire system weighs 10.75 ounces and stows smaller than most 1L bottles.

 

 

 

5. Katadyn Hiker Pro

 

The Katadyn Hiker Water Filter is a pump-based filter that removes particulates, protozoa, and bacteria down to 0.2 microns in size, including giardia, salmonella, and cryptosporidium. It includes a pre-filter at the hose outlet that filters to 150 microns, good for use with cloudy or sediment-filled water, which removes large contaminants before they reach the main filter and increase its life span. Quick-connect fittings permit removal of input and output hoses: the hoses also connect directly to hydration reservoirs with 0.25 in. drink tubes. The expected filter life is 1150 liters before replacement is required. The Hiker weighs 11 ounces.

 

 

6. Steripen Ultra UV Water Purifier

 

 

The Steripen Ultra is a water purifier that uses ultraviolet light to neutralize bacteria, protozoa, and viruses that can make you ill. The Ultra is USB rechargeable and fits in narrow or wide-necked bottles. It’s also one of the best solutions for purifying cold water, which will create tiny holes in most filters if it freezes when the filter element is damp in cold weather, thereby destroying them. To use it, you simply dip it in a container of water and stir, until an indicator lamp signals that the water is purified, after about 90 seconds. Weighing just 4.94 ounces, the Steripen Ultra has a UV lamp life of 8000 uses.

 

 

7. Grayl GeoPress Water Purifier Bottle

 

The Grayl GeoPress is a bottle-based water purifier that removes Protozoa, Bacteria, and Viruses from water sources. The GeoPress has an outer bottle and an inner bottle, with a filter at one end and a drinking spout with a screw-on top at the other. To use it, you pull the inner bottle out of the outer bottle, fill the outer bottle up with suspect water, and then push the inner bottle into the outer bottle like you would a french press. When finished, you can carry your purified water and sip it directly from the bottle for added convenient or decant it to a different container.

 

 

8. MSR Miniworks EX

 

The MSR Miniworks EX is a pump style water filter that screws onto wide-mouth Nalgene bottles and soft canteens. While the MiniWorks is heavier than simpler squeeze-style water filters, it’s a better solution for filtering turbid, cloudy, or tannic water sources like snowmelt, spring thaw, or algae-infested ponds and turning them into clear and pleasant tasting water. That’s because the Miniworks is a three-stage filter, with a pre-filter that removes larger solids, a ceramic filter to remove microorganisms, and a charcoal filter to remove unpleasant odors and tastes. Weighing 17 ounces, the Miniworks has an output of 1 liter per minute and filters out contaminants down to 0.2 microns in size. The expected filter lifetime is 2000 gallons. Replacement filters are also available.

 

 

9. MSR Trail Shot

The MSR TrailShot Pocket-Sized Water Filter for Hiking, Camping, Travel, and Emergency Preparedness is designed specifically for adventurers who want an effective, reliable water filter without the weight. And when it’s not on the trail, it’s on hand to provide clean water during disasters and emergencies, and in survival situations. Drink directly from lakes, rivers, and streams, without lying in the dirt, with the help of the tube attachment, or fill a water bottle, hydration pack, or other vessel. The easy, one-handed pumping mechanism filters one liter in just 60 seconds. Hollow fiber technology meets U.S. EPA drinking water standards, allowing water to pass through, but trapping harmful protozoa, like giardia and cryptosporidium, as well as bacteria, like salmonella. The MSR TrailShot Pocket-Sized Water Filter is effective against bacteria (99.9999%), protozoa (99.9%) and particulate, and filters up to 2,000 liters without iodine, chlorine, and other chemicals.

 

10. MSR Guardian

The MSR Guardian is the most sophisticated and effective water purifier available today. Self-cleaning, it has a high flow rate, and generates remarkably good tasting water. While it is an excellent tool for backcountry use and international travel to countries with suspect water, it’s also quite a nice product to have on hand for emergency preparedness at home. The Guardian physically removes viruses, bacteria, protozoa and particulate, including hepatitis A, E. coli, giardia, and cryptosporidium and has a pore size of 0.02 microns. Weighing just 17.3 ounces, the Guardian has a self-cleaning filter that constantly purges itself while you filter water so you never have to backflush or scrub the filter element. It also has an exceptionally high flow rate of 2.5L per minute, making it ideal for individual or small group use.

 

 

 

 

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I hope you found this breakdown helpful! If you have any further questions or concerns on certain filters or just want to pick my brain on a topic, please drop me a comment in the box below and let me bring the information to you!

 

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