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7 Best Reverse Osmosis Systems of 2024

Reverse osmosis systems are water filters that use a specialized membrane to remove or reduce the presence of contaminants from water. RO systems are considered to be among the most effective water filtration systems and are a top pick for homeowners who are looking to reduce the most contaminants and hard-to-remove contaminants like fluoride and arsenic.

However, not all reverse osmosis systems are created equal — so it’s important to research to ensure you’re investing in a quality solution that meets both your budget and your needs. To give you a head start, we’ve gathered our picks for the best reverse osmosis systems available right now.

Our Top RO Systems

  • Aquasana – SmartFlow™ Reverse Osmosis – AQ-SFRO ($224.99)
  • Whirlpool – UltraEase Reverse Osmosis Filtration System – WHER25 ($184.52)
  • Waterdrop – G3 Reverse Osmosis Water Filter System – WD-G3-W ($529.00)
  • iSpring – 6-Stage Reverse Osmosis System – RCC7AK ($211.11)
  • GE – Under Sink Reverse Osmosis Water Filtration System – Gxrm10RBL ($154.43)
  • APEC – 5-Stage Reverse Osmosis Drinking Water Filter – ROES-50 ($199.95)
  • Waterdrop – G2P600 Reverse Osmosis Water Filtration System for Home – WD-G2P600-W ($359.99)

Aquasana SmartFlow™ Reverse Osmosis – AQ-SFRO

Aquasana SmartFlow™ Reverse Osmosis - AQ-SFRO

System Cost: $224.99

Replacement Cost: $169.97 – 4 filters

System Overview

Priced at $224.99 (with a replacement subscription option of a pack of 4 filters selling for $169.97), this system offers great bang for your buck compared to other options that are more expensive but filter fewer contaminants. As a result, it’s our top recommended reverse osmosis system and here’s some more context as to why.

Aquasana’s SmartFlow™ Reverse Osmosis removes up to 99.99% of 90 contaminants, including fluoride, arsenic, chlorine, and lead. Among those contaminants, the system reduces 90% of fluoride — which is a contaminant that people often turn to RO filters for help with, though not all RO filters actually address it. Performance claims for the system are also backed up by rigorous testing by the WQA, who has certified it to several NSF/ANSI Standards, including 42, 53, 58, 401, and CSA B483.1. Outside of contaminants that we’ve noted, the system can also help reduce the presence of pesticides, herbicides, microplastics, PFOA/PFOS, and other impurities that may be present in your tap water. 

The system is packed with technology that’s worth calling out, like the Claryum® technology that uses three different methods of filtration to remove contaminants and the SmartFlow™ membrane technology that helps reduce waste water and extend filter life. The system also comes with a remineralizer, which helps to restore healthy minerals that are often lost during the reverse osmosis process. Restoring these minerals helps to improve the health benefits and taste of your tap water.

We also like that it comes with an air gap all-metal faucet in several finish options, including brushed nickel, chrome, oil rubbed bronze, and matte black. The air gap prevents backflow into your system, and the all-metal faucet is more premium than comparable systems that sometimes come with a cheap and flimsy plastic faucet. Plus, having several finish options allows you to match your home’s aesthetic. Unlike some RO systems, you may also be able to keep your existing faucet if you’d prefer (as long as it meets the manufacturer’s specifications).

Pros

  • Removes up to 99.99% of 90 contaminants, including arsenic, chlorine, fluoride, and lead
  • WQA tested and certified to various NSF/ANSI Standards
  • Features advanced Claryum® and SmartFlow™ technology to remove contaminants, reduce waste water, and extend filter life
  • Includes a remineralizer to restore healthy minerals
  • 90-day satisfaction guarantee and 2-year limited warranty
  • Air gap faucet prevents backflow into your filter, and the all-metal faucet feels premium (though you may also be able to keep your existing faucet)

Cons

  • May require professional installation, which can add to costs unless you feel competent DIYing the process

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Whirlpool UltraEase Reverse Osmosis Filtration System – WHER25

Whirlpool UltraEase Reverse Osmosis Filtration System – WHER25

System Cost: $184.52

Replacement Cost: $104.00

System Overview

Next on our list, is Whirlpool’s UltraEase Reverse Osmosis Filtration System WHER25. The system is on the lower end of costs compared to other RO systems, and reduces the presence of 26 contaminants, including arsenic, lead, and chlorine, among others.

The contamination removal capabilities of this system mean it should create water that’s great for drinking and cooking, though it’s important to note that it will not remove fluoride, which is a key motivation behind many people buying an RO system. The system is known for its ease of use, as it can generally be installed without a plumber and maintenance is also reported to be simple enough for you to DIY. Speaking of replacements, the system features an EZ-Change Indicator Light to let you know when it’s time to change out your filter.

While the system has a lot of positives, we wanted to note a few downsides to be aware of. The user lacks efficiency, as it wastes four gallons of water for every gallon of filtered water it provides and its 18 gallons-per-day capacity is much lower than other RO systems you can buy. We’ve also seen many Amazon users complain about the plastic faucet, which looks cheap and has resulted in leaks from cracking and the lack of an air gap to prevent backflow into the system. Though this is true for many other RO systems, you should be aware that this system doesn’t feature a remineralizer to restore healthy minerals lost during the reverse osmosis process.

Pros

  • Reduces 26 contaminants arsenic, lead, and chlorine
  • Tested and certified to NSF/ANSI standards 42 and 58
  • Low cost compared to other RO systems
  • Easy to install and replace filters, with an indicator light telling you when it’s time to swap filters
  • 1-year warranty

Cons

  • Does not remove notable contaminants like PFOA/PROFS and fluoride, which is a key reason many people consider RO systems
  • Wastes four gallons of water for every gallon of filtered water it produces, and has a low capacity
  • Features a plastic faucet that does not use an air gap, which many users have noted looks cheap and causes leaks
  • No remineralizer stage to restore healthy minerals

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Waterdrop G3 Reverse Osmosis Water Filter System – WD-G3-W

Waterdrop G3 Reverse Osmosis Water Filter System – WD-G3-W

System Cost: $529.00

Replacement Cost: $172.00

System Overview

Waterdrop’s G3 Reverse Osmosis Water Filter System WD-G3-W comes in at a higher price point of $529.00 (with $172.00 replacements), but for many, it’s worth it. Capable of reducing 22 contaminants, including chloramines, chlorine, cysts, fluoride, lead, and PFOA/PFOS, this system is certified by the Federal Communications Commission and meets the EU and UKCA Standards for safety. It even won the German Red Dot Design Award in 2019. Plus, a third-party lab found that it had a 91.9% TDS removal rate and a 96.9% hexavalent chromium reduction rate.

This G3 Reverse Osmosis Water Filter WD-G3-W System has an eye-catching design with several metal finish options and a smart faucet display to tell you TDS levels and information about the filter’s life. Another callout of the system’s design is that it’s tankless, which can help you save space under your sink.

Regarding technical specifications, it’s tested and certified for NSF/ANSI 58 and 372 Standards, and features 8-stages of filtration, including a PP cotton layer, an activated carbon black layer made from coconut shells, a scale inhibitor membrane, a reverse osmosis membrane layer, a post-activated carbon block layer, and a second PP cotton layer. It also has a 600 GPD large capacity, meaning you can fill up a glass of water in just eight seconds.

The main drawback of the system is its high price tag relative to the number of contaminants it reduces, as you can find cheaper systems that address more contaminants. Additionally, the system doesn’t feature a remineralizer and we’ve seen a few user reports of it being noisy.

Pros

  • Reduces 22 contaminants, including chloramines, chlorine, cysts, fluoride, lead, and PFOA/PFOS
  • 30-day satisfaction guarantee and 1-year warranty
  • Smart faucet display shares TDS levels and information about the filter life
  • Space saving from a tankless design

Cons

  • High cost relative to the number of contaminants reduced
  • User reports of it being noisy
  • No remineralizer stage to restore healthy minerals

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iSpring 6-Stage Reverse Osmosis System – RCC7AK

iSpring 6-Stage Reverse Osmosis System – RCC7AK

System Cost: $211.11

Replacement Cost: $67.00

System Overview

The iSpring 6-Stage Reverse Osmosis RCC7AK System was designed to restore water’s natural alkalinity and mineral balance for better tasting water, though it offers great contamination removal capabilities in general at a very reasonable price. It can remove up to 99% of chloramines, chlorine, fluoride, asbestos, calcium sodium, arsenic, and up to 98% of lead from drinking water. However, it won’t remove notable contaminants like pesticides, herbicides, PFOA/PFOS, VOCs, pharmaceuticals, or cysts.

This system is NSF/ANSI 58 certified and has a remineralizer stage to produce a balanced alkalinity, restore healthy minerals, and improve taste. Another positive is that it’s made for DIY installation with everything you need included, and the manufacturer provides access to manuals, instructional videos, and lifetime technical support.

Downsides to be aware of are that users have reported it’s prone to leaking as a result of the feed water adapter and plastic fittings, which required many users to buy teflon tape to help with. Users also reported leaks with the faucet it comes with, and another con is that you can’t choose a finish for this faucet to match your home’s aesthetic.

Pros

  • Has a remineralizer stage to restore healthy minerals
  • NSF/ANSI 58 certified
  • 30-day satisfaction guarantee and 1-year warranty
  • Easy, DIY installation

Cons

  • Does not remove pesticides, herbicides, VOCs, pharmaceuticals, or cysts
  • Leaking issues with feed water adapter, requiring Teflon tape or a replacement part
  • User reports of a flimsy faucet that’s prone to leaking, and no options to choose a finish to match your home’s aesthetic

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GE Under Sink Reverse Osmosis Water Filtration System – Gxrm10RBL

GE Under Sink Reverse Osmosis Water Filtration System – Gxrm10RBL

System Cost: $154.43

Replacement Cost: $58.00

System Overview

If you’re on a tight budget, this system may offer just enough of what you’re looking for in an RO system without breaking the bank. The system features three stages of filtration, and it can remove 14 contaminants, including chlorine, chloramines, cysts, fluoride, and lead. It’s NSF/ANSI certified to Standards 42 and 58, and features a premium chrome faucet with a reminder light so you know when it’s time to replace your filters.

The downsides of this system include that it doesn’t address some of the notable contaminants people hope to with an RO filter like PFOA/PFOS, pesticides, herbicides, VOCs, and pharmaceuticals. Additionally, it’s only capable of filtering 10 gallons per day, which may be too low for households with multiple people. While the chrome faucet does look premium, you don’t have the option of multiple finishes if that doesn’t match your home’s style. Many users have also noted the leaks from a flimsy air gap part, which sometimes required multiple replacements. Finally, it doesn’t come with a remineralizer, so you may lose some of the health benefits of your water and have a slightly off taste.

Pros

  • Low price point for a system that removes fluoride among other contaminants
  • NSF/ANSI 42 and 58 certified
  • 1-year warranty
  • Features a faucet with a premium chrome finish and a reminder light

Cons

  • Can’t remove pesticides, herbicides, pharmaceuticals, VOCs, or PFOA/PFOS
  • Can only filter 10 gallons per day
  • No faucet finish options to match your home’s aesthetic
  • Air gap part prone to leaks and breaking
  • No remineralizer stage to restore healthy minerals

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APEC 5-Stage Reverse Osmosis Drinking Water Filter – ROES-50

APEC 5-Stage Reverse Osmosis Drinking Water Filter – ROES-50

System Cost: $199.95

Replacement Cost: $73.00

System Overview

The APEC ROES-50 is a product that’s easy to recommend, coming in at a reasonable price of $199.95 considering it reduces 99% of 48 contaminants through five stages of filtration. Notable contaminants the system addresses include chloramines, chlorine, cysts, fluoride, herbicides, lead, pesticides, pharmaceuticals, PFOA/PFOS, VOCs, and more. The system is WQA tested and certified to NSF/ANSI Standard 58, and users report it provides great-tasting water to make drinking and cooking more enjoyable. Another benefit is that the system features easy installation, so you can DIY and save by not having to hire a plumber.

When it comes to downsides, there are a few worth noting. The system does not offer different finish options, so the faucet they provide may be a mismatch with your home. Additionally, the system requires a decent amount of space below your sink to support the 50 gallon capacity it offers. Last of all, it does not include a remineralizer stage, so you may be missing out on healthy minerals lost during the RO process.

Pros

  • Reduces 99% of 48 contaminants including fluoride, PFOA/PFOS, and lead among others
  • WQA certification to NSF/ANSI Standard 58
  • 1-year warranty
  • 50 gallon capacity
  • Easy, DIY installation

Cons

  • Only one option for the faucet’s finish
  • Requires a decent amount of space below the sink
  • No remineralization to restore healthy minerals

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Waterdrop G2P600 Reverse Osmosis Water Filtration System for Home – WD-G2P600-W

Waterdrop G2P600 Reverse Osmosis Water Filtration System for Home – WD-G2P600-W

System Cost: $359.99

Replacement Cost: $120.00

System Overview

Last but not least, the final RO system to make our list is the Waterdrop G2P600M, which features seven stages of filtration and can filter up to 600 gallons of water per day. The system touts that it eliminates 1,000+ contaminants, including fluoride, PFOA/PFOS, and VOCs, among others.

Its CF filter reduces the presence of rust, sediment, and organic matter in your water with its sediment PP membrane and activated carbon block, while the MRO filter combines a sediment PP membrane and an activated carbon block with a PET pleated membrane and an extremely fine 0.0001-micron reverse osmosis membrane to intercept fluoride, PFAS, TDS, salt, nitrates, and heavy metals, and more. While it removes a lot of contaminants, it’s one of the few systems on our list that also contains a remineralizer to restore healthy minerals to your water.

A few final positives of the system are that it features “30 minute installation” and “2 second replacements” with no plumber required, and features a tankless design to save space under your sink.

Despite the positives, one glaring issue we see with the system is that it’s not WQA or NSF/ANSI certified, which may be a deal breaker if you want unbiased proof of the system’s capabilities. Another issue is that although the faucet comes in a premium metal finish, you can’t choose between several options, meaning it may mismatch with your home’s design.

Pros

  • Removes fluoride, VOCs, and PFO/PFOS
  • 1-year warranty and 30-day satisfaction guarantee
  • Premium metal faucet
  • Tankless design to save space

Cons

  • Not WQA or NSF/ANSI certified
  • No faucet finish options

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Choose the Right Reverse Osmosis System for Your Home

With information about some of the top RO systems on the market right now, you should be equipped to choose a solution. If you’re still unsure about any of the systems on this list, you can learn more about them and RO systems in general on our Reverse Osmosis Filter Reviews page, or click on the systems to learn more. We’ve also included some helpful information about RO systems in the FAQ section below.

FAQs About Reverse Osmosis Systems

Is reverse osmosis the best filtration method?

Reverse osmosis is generally considered the most effective filtration method, as it’s capable of removing a wide range of contaminants ranging from heavy metals to microorganisms. While reverse osmosis systems may have higher upfront costs compared to other filtration methods, they offer exceptional performance if removing contaminants is a priority.

How do reverse osmosis systems work?

Reverse osmosis systems use pressure to force water through a semi-permeable membrane containing pores that are small enough that most contaminants can’t pass through. Larger contaminants, including minerals, ions, bacteria, and particles, will get caught, and filtered water passes through to the other side.

How long does a reverse osmosis system last?

A reverse osmosis system’s lifespan can vary depending on factors such as the quality of the system, maintenance frequency, and the water conditions it is subjected to. On average, a well-maintained residential reverse osmosis system can last 10 to 15 years or longer.