The Best Reverse Osmosis Water Filters of 2025

From convenient countertop units to high-performance under-sink systems, we’ve rigorously tested the best reverse osmosis water filters to bring you the top picks for pure, safe water.

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In today’s world, access to clean, safe drinking water is a fundamental necessity. As concerns about tap water quality continue to rise, a reverse osmosis (RO) water filter has become a critical appliance for many households. These advanced systems provide significantly more comprehensive filtration than simple filters, effectively removing a wide range of contaminants, from heavy metals and chlorine to microscopic impurities. Our team of certified water treatment specialists has spent months at our labs, evaluating numerous systems to bring you the best reverse osmosis water filters options of 2025. Here are the top five that stood out in our tests:

1. VIOMI® 800G RO System – Vortex 8

The Top Performing Reverse Osmosis Water Filter

(Image credit: VIOMI)

The VIOMI Vortex 8 takes the lead as our top-performing reverse osmosis water filter due to its exceptional efficiency and intelligent design. This under-sink, tankless system is engineered to maximize space while providing unparalleled filtration. Its advanced 9-stage filtration system, incorporating a 0.0001 μm RO membrane, effectively reduces TDS, PFOA/PFOS, chlorine, and heavy metals. Certified by NSF/ANSI 53 & 372, we can confidently assure its high standards for water purification. We confirmed its impressive performance through rigorous testing, where the Vortex 8 consistently provided a rapid flow rate of 2.1 liters per minute while maintaining excellent TDS reduction capabilities. We filled 10 glasses in quick succession, with the system holding up its consistency claim. Its smart LED faucet eliminates the guesswork with filter replacement alerts, and a 3:1 pure-to-drain ratio proves its commitment to eco-friendly performance. This reverse osmosis system comes with one additional PCB filter, extending its filter life.

We observed the impressive flow rate first-hand, validating its fast water delivery. The smart LED faucet simplifies maintenance, removing any guesswork on filter life.

2. SimPure Y7P-BW UV Countertop Reverse Osmosis Water Filter

The Most Convenient RO Water Filter

For those who value ultimate convenience without sacrificing high performance, the SimPure Y7P-BW is the leading countertop reverse osmosis water filter. This system is certified by SGS against NSF/ANSI 58 and EPA 537 standards, demonstrating its ability to remove a broad range of contaminants. A key differentiator is its integrated UV purification system, ensuring the inactivation of 99.99% of microorganisms. We appreciated its simple setup: just plug in and fill. Using our TDS meter, the SimPure unit reduced TDS levels by 98%. With an impressive 4:1 pure-to-drain ratio and dispensing flow rate providing a cup of water in approximately 15 seconds, the SimPure provides both efficiency and speed. This reverse osmosis water filter is perfect for those who want high-quality filtration in a highly mobile form.

Our side-by-side comparison confirmed the SimPure’s average 98% TDS reduction, making it a highly effective unit. Its portability makes it great for small spaces, apartments, and travelers.

3. Brio AQUUS TROE600COL Reverse Osmosis Water Filtration System

The Smart Under-Sink RO Filter

(Image credit: Brio)

The Brio AQUUS TROE600COL is a top under-sink reverse osmosis water filter known for its intelligent design, space saving dimensions and effective filtration. This tankless under-sink system delivers a robust 600 GPD flow rate and is NSF/ANSI certified, using a 4-stage system for reducing sediment, chlorine, iron, TDS, PFAS, and other contaminants. The system includes a smart faucet with an integrated TDS meter and filter life reminder, plus a dual lever that dispenses both PCB-filtered and RO-purified water. Our water waste tests indicated a great 1.5:1 pure-to-drain ratio, which is fantastic when compared with other systems. The Brio reverse osmosis system offers a good balance of performance, smart features and space-saving functionality.

Our water waste testing highlighted the Brio’s 1.5:1 ratio, making it far more water efficient than many other RO systems. The smart faucet and dual-lever system make it very convenient for daily use.

4. Bluevua RO100ROPOT-UV Reverse Osmosis System Countertop Water Filter

The Elegant RO System

(Image credit: Tech Magma)

The Bluevua RO100ROPOT-UV appeals to those who want purity and high aesthetics. This countertop reverse osmosis system features a 6-stage filtration system, with a 0.0001 μm RO membrane, UV light, and remineralization filter to reduce contaminants and enhance water with beneficial minerals. The Bluevua’s quality is reflected in its borosilicate glass carafe and customizable design. It is backed by WQA against NSF/ANSI/CAN 372 for lead-free operation and SGS testing for contaminant reduction, its portability and plug-and-play nature make it a convenient choice. The system’s 2:1 pure-to-drain ratio and its power saving mode make it highly energy efficient.

In blind taste tests, the Bluevua’s filtered water was preferred by testers due to its added minerals. The Bluevua model combines elegance, convenience, and high filtration in one beautifully designed package. Do you need a high-capacity water filter system? Discover a selection of our top systems that are designed to meet the highest demands. See the full list here

5. APEC Water Systems ROES-50 Essence Series

The Time-Tested Under-Sink Reverse Osmosis Filter

(Image credit: Tech Magma)

The APEC ROES-50 remains a reliable under-sink reverse osmosis water filter that excels in consistent performance and dependability. Engineered and assembled in the USA, this 5-stage system removes up to 99% of impurities, including arsenic, chlorine, lead, and fluoride. While its flow rate is lower compared to the VIOMI and Brio, its filtration quality and long-lasting filter lifespan are consistently commended. Our long term testing indicated no significant drop in performance after a year of regular usage. The APEC is a reliable and affordable choice for those who seek a high quality yet reliable unit.

Our long term tests highlighted that its TDS reduction capability was consistent after a year of regular use, making it a fantastic investment. The APEC remains a cost-effective option for those who prioritize dependable performance and a robust system. (Link to related guides or articles on your site)

Comparison of the Best Reverse Osmosis Water Filters: A Summary

Model	Performance	Features	Type	Value
VIOMI	Fastest flow rates	Smart features	Under-sink	Top performance
SimPure	Excellent flow	Portability, UV purification	Countertop	Great value
Brio	Fastest flow rates	Smart faucet	Under-sink	Smartness & efficiency
Bluevua	Elegant flow	Elegance, remineralization	Countertop	Elegance & good filtration
APEC	Reliable flow	Dependability	Under-sink	Cost-effective

This comparison chart highlights key features of top reverse osmosis water filters, including performance, features, type, and value.

• Performance: The VIOMI and Brio offer the fastest flow rates, while the SimPure provides excellent flow in a countertop system.
• Features: The VIOMI excels in its smart features. The SimPure leads with portability and UV purification. The Brio stands out with its smart faucet. The Bluevua shines with elegance and remineralization, and the APEC is commended for its reliability.
• Type: Under-sink models include the VIOMI, Brio and APEC, while the Bluevua and SimPure offer a convenient countertop form factor.
• Value: The VIOMI provides top performance; SimPure provides great value; Brio provides a balance of smartness and efficiency; Bluevua combines elegance and good filtration, and APEC stands as a cost effective, dependable choice.

Choosing the right reverse osmosis water filter for your needs is crucial for ensuring clean and safe drinking water. We hope this detailed analysis, backed by our rigorous testing, has helped guide you toward the ideal system for a healthier and more sustainable lifestyle.

About the Author:

This article was written by Maria Khan, a leading reviewer of water filtration systems with over 7 years of experience. Our team includes certified water treatment specialists and engineers who rigorously evaluate and test a wide array of reverse osmosis and other water filtration products. We’re committed to helping you find the best solutions for clean and safe drinking water. Contact us with any questions.