Ranking The 10 Best Water Purifiers of 2021

Matt Lewis
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This guide will help you pick the best water purifier for your individual situation. We created it for you because we want our readers to have clear, unbiased reviews of the best water purifiers. We hope this article helps you pick the purifier that will work best for you.

If you want to read reviews of the best water filter pitchers, best countertop water filter pitchers, and best water dispensers, we’ve reviewed them extensively as well.

Why do you need a water purifier?

If you are looking for a water purifier, you are likely concerned about your water. Chlorine and industrial compounds are common pollutants found in our water supply. If you are like most people, your water comes from a municipal source like a town well, a river, or a lake. If the source for your water is from a river or lake, it may also contain parasites, heavy metals, and sediment.

Water purifiers remove many forms of water pollutants through filtration, ozone, ultraviolet radiation, or even reverse osmosis.

Here are some of the reasons you might want to consider getting a purifier:

  • You live in an area with well water, springs, or surface water that is contaminated
  • You recently relocated to a new town and are suspicious of the water
  • A member of your family is ill, and you suspect the water might be the cause
NameCategoryProduct
LifeStraw Personal Water FilterBest OverallLifeStraw Personal Water Filter
Sawyer Products MINI Water Filtration SystemBudget PickSawyer Products MINI Water Filtration System
LifeStraw Family 1.0 Portable Gravity Powered Water PurifierUpgrade PickLifeStraw Family 1.0 Portable Gravity Powered Water Purifier

1. LifeStraw Personal Water Filter

Our rating: 9 / 10

LifeStraw Personal Water Filter

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Pros:

  • Clears out 99.99% of viruses and bacteria
  • You won’t find many filters that work this well for this little price
  • Very easy to use even for beginners
  • Maintenance is straightforward
  • Lightweight and compact design

LifeStraw has been a great product in many areas, including traveling. So why wouldn’t you get this product for your betta?

It has a nice flow rate, so you never have to worry about making bubbles. It’s also very easy to use and does an amazing job of filtering out all those nasty bits of fish poop and uneaten food that are floating around in the water.

The LifeStraw Squeeze Water Bottle is another great option if you want something more convenient than this.

2. Platypus GravityWorks High-Capacity Water Filter System

Our rating: 9 / 10

Platypus GravityWorks High-Capacity Water Filter System

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Pros:

  • This water purifier can serve as a primary source of clean water
  • You can clean up to 4 liters of water every minute which means it can be used to quickly refill water bottles for group recreational trips
  • You can remove almost any element or substance from your water
  • It is capable of removing fluoride, chlorine, heavy metals and so much more. It can even remove microplastic particles from the water
  • You can easily replace the ozonator and cartridge of this gravity water purifier and the battery in the UV light can last up to 20,000 hours
  • It also removes microbes, bacteria, and viruses from the water
  • Since the Platypus GravityWorks is an excellent water purifier, you can even use it to purify your drinking water for your pets
  • The system is very easy to use, you only need to hook the filter to your water source and then pour water into the tank
  • It filters any impurities present in the water and then the gravity filtration pulls the water through to the upper chamber of the tank
  • The water also gets treated with UV light and ozone while it flows through the tank

/min Flow Rate, Gray.

3. Katadyn Hiker Pro Transparent Water Filter

Our rating: 9 / 10

Katadyn Hiker Pro Transparent Water Filter

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Pros:

  • Removes up to 99.99 percent of Cryptosporidium and Giardia
  • Pour straight into your water bottle
  • More than 10,000 gallons of life-saving water without any chemicals or pre-filtering
  • Holds 10,000 gallons of water at a rate of 1 gallon per minute
  • Weighs just 13 ounces
  • Backed by a 5-year manufacturer’s warranty
  • Pricey, but truly, a life-saving water purification system

Cons:

  • Versions for outdoor groups of people are not available
  • Costly and may not be your best option for home and travel

If you want something lightweight, rugged, effective, and simple, this is one of the best choices you can find on the market today, and it will be a great purchase. It only removes 99.99 % of Cryptosporidium and Giardia, which are able to survive in most water sources.

4. Sawyer Products MINI Water Filtration System

Our rating: 9 / 10

Sawyer Products MINI Water Filtration System

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The MINI water filter is a plastic canister filter made with a hollow fiber membrane. It uses gravity to remove contaminants for consumption, is easy to use, and is relatively low maintenance.

If you’ve been considering a water filter but don’t want something that is bulky or complicated to use, this product may be exactly what you’ve been looking for.

5. GRAYL Ultralight Water Purifier

Our rating: 9 / 10

GRAYL Ultralight Water Purifier

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Pros:

  • Ultralight
  • Filters up to 100 gallons of water
  • Sleek compact design that fits in the palm of your hand
  • Comes in a variety of colors
  • Comes with a protection guarantee against breakage on the inside
  • The ‘snaplock’ cap allows you to take your drink on the go
  • Comes with a lifetime warranty

Cons:

  • Not for use on cloudy or dirty water
  • Quality control …sealing issues with early units

At first glance, this innovative new water system from Grayl looks like a regular water bottle.

On closer inspection, you’ll find that it contains a unique filtration system that allows you to squeeze fresh water out of any stream or body of water.

The bottle has a unique purification mechanism through which dirty and stagnant water is passed via a carbon-activated filter. This filter turns it into clear and refreshing water in seconds.

6. LifeStraw Family 1.0 Portable Gravity Powered Water Purifier

Our rating: 8 / 10

LifeStraw Family 1.0 Portable Gravity Powered Water Purifier

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Pros:

  • The biggest and most important positive of this portable water purifying device is its price
  • With LifeStraw, you can easily find safe & drinkable water anywhere
  • It is a tube type filter that's lightweight and compact
  • The product is ideal for when you're out in the wild
  • It won’t waste your precious time and energy trying to find a water source
  • It makes filtering water so easy and simple
  • It is appropriate for camping, during an emergency or traveling
  • It can eliminate 99.9999% of all disease-causing bacteria
  • It is manufactured with a unique hollow fiber membrane
  • The cartridge limits clogging and can be easily cleaned

7. Sawyer Products One-Gallon Gravity Water Filtration System

Our rating: 8 / 10

Sawyer Products One-Gallon Gravity Water Filtration System

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Pros:

  • Very popular with experienced travelers, campers, and hikers
  • Simple 1-2-3 configuration makes it a very quick and easy water filter to operate
  • Filters a liter of water in about 3 minutes
  • Removes bacteria, protozoa cysts
  • Does NOT remove chemicals (including chemtrails)
  • Portable and lightweight
  • Includes a handy 0.2 micron hollow fiber filter

Cons:

  • You need to hold the bottle upside down as you filter the water
  • You have to backwash it from time to time (as with all hollow fiber filters)
  • Available in only one size (1 gallon)
  • The filter element is not the most advanced (it’s just a 0.2 micron hollow fiber)

This model is one of the lightest and most portable water purifiers you can get. Like all products from the Sawyer line it’s very user-friendly and easy to operate.

This unit will remove 99.99% of all waterborne bacteria, including giardia and salmonella. As well as 99.9% of all protozoan cysts, such as cryptosporidium and giardia. It also removes silt from the water.

8. Katadyn BeFree 3.0L Water Filter

Our rating: 8 / 10

Katadyn BeFree 3.0L Water Filter

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Pros:

  • Can use carbon-based filter for untreated water
  • Comes with a handy attachment to hold it onto a standard bottle
  • Has a handy gauge
  • Comes with a comprehensive manual
  • The carbon-based filter can be detached from the main unit for easier storage

Cons:

  • The filter is quite loud when operating
  • Can get clogged if you don’t clear it out regularly
  • Doesn’t come with a storage pouch

The Katadyn BeFree is a powerful hand pump alternative to a water filter. It can only be used for untreated water.

It has a simple design but it is very easy to use, just screw onto any sterilized bottle, pump once and you get up to 3.0L of drinking water.

We loved the handy attachment that you can clip onto a standard sized water bottle to save you from holding the unit while you are pumping. The carbon-based filter can be detached from the main unit for easier storage.

9. SteriPen Adventurer Opti UV Personal Water Purifier

Our rating: 8 / 10

SteriPen Adventurer Opti UV Personal Water Purifier

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Pros:

  • Longest battery life of all Steripen models
  • UV flash light convert any plastic bottle into a lamp
  • Great for solar water filtration
  • The most compact design available
  • No battery replacement

Cons:

  • Expensive compared to other options on the market
  • UV lamp seems to be aimed at regions with significant sun coverage like Arizona and tropical beaches; if you are solely depending on the Steripen to purify your water, you need to be within 50 feet of the sun, which isn’t always possible
  • The UV lamp runs out of power fast, especially if the liquid is not clear
  • Filters may break depending on the type of water you are trying to purify

The Steripen Adventurer is the perfect compact water purifier for your life on the road. The Adventurer will quickly turn unfiltered water in water you can drink, similar to the other Steripen products. If you plan on heading to a campground that doesn’t have running water, the Steripen Adventurer is the perfect choice.

Unlike traditional models, the Adventurer has a UV light source. This light provides the Steripen with more capabilities than any other model because this light can be used to purify water and as a flashlight.

10. SteriPen Classic 3 UV Water Purifier and 40 micron Pre-Filter bundle.

Our rating: 7 / 10

SteriPen Classic 3 UV Water Purifier and 40 micron Pre-Filter bundle.

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Pros:

  • You are assured of clean water while camping or anytime you get stuck without bottled water
  • It also filters water that may be dirty or poor in quality
  • You will not have to taste the chlorine found in tap/bottled water
  • Travelers will find it valuable when they are out of bottled water
  • You will not have to waste time filtering water when you want a drink
  • It can purify up to 264 liters without replacing the Pre-Filter or bulb

Cons:

  • This household device can only be used with clear, running water; water that is cloudy, muddy or sandy cannot be cleared.
  • It cannot clear water that has high amounts of dissolved solids or heavy metals
  • The instructions for use are not available in a printed form.
  • The device must be disinfected before use
  • It is waterproof but not adequate for use in salt water

The SteriPen Classic 3 is a portable UV water sterilizer that permits you to save yourself from the dangers of contaminated water while you are away from home. You can take this device on your camping trip, on a tour or any other place you may find yourself.

Conclusion

Picking out a water purification system can be tricky, especially given the fact that you need to know a lot of technical details. Ideally, you should know the main contaminants in your water, along with the contaminants extra filters will help to remove. If you know all that then you can buy the best water purifier system for your specific water contaminants. In this article, we do most of the work for you by providing you with a summary of the most popular water purifiers and a ranking of the highest rated water purifiers we could find.

Our Recommendation

NameCategoryProduct
LifeStraw Personal Water FilterBest OverallLifeStraw Personal Water Filter
Sawyer Products MINI Water Filtration SystemBudget PickSawyer Products MINI Water Filtration System
LifeStraw Family 1.0 Portable Gravity Powered Water PurifierUpgrade PickLifeStraw Family 1.0 Portable Gravity Powered Water Purifier