Best Countertop Reverse Osmosis System Choices of 2023 – Our Top-Ranked Reverse Osmosis Systems

Clean, safe drinking water is a necessity in every home. One of the best ways to ensure you have high-quality water is by using a countertop reverse osmosis filter. These systems are compact, easy to install, and highly effective at removing a wide range of contaminants from your water. 

In this article, we will guide you through the best countertop reverse osmosis system available in the market, their features, pros and cons, and what to look for when buying one.

Key Factors to Keep In Mind When Choosing Your System

When choosing a countertop reverse osmosis filter, it’s important to consider several key factors to ensure you’re getting a system that meets your specific needs. Here are some of the most important factors to consider:

• Contaminants Removed: Different filters are capable of removing different types of contaminants. Make sure the system you choose is capable of removing the specific contaminants present in your water.
• NSF certifications: Look for filters that have been certified by the NSF. This ensures that the system has been tested and proven to remove the contaminants it claims to remove.
• Water/Filtration Capacity: Consider how much water you need to filter each day. If you have a large family or use a lot of water for cooking, you may need a system with a higher capacity.
• Water Pressure: The efficiency of reverse osmosis water filters is often dependent on water pressure. Ensure your home has sufficient water pressure for the system to operate effectively.
• Flow Rate: This refers to how quickly the system can filter water. If you use a lot of water or don’t like waiting, you may want a system with a high flow rate.
• Remineralization Needs: Some filters include a remineralization stage, which adds beneficial minerals back into the water after filtration. If you prefer mineral-rich water, this is a feature to look for.
• Wastewater Ratio: Countertop RO filters produce wastewater as part of the filtration process. Look for filters with a low wastewater-to-pure water ratio to conserve water.
• Maintenance Requirements: Some filters require more maintenance than others. Consider how much time and effort you’re willing to put into maintaining the system.
• Warranty: A good warranty can provide peace of mind and protect your investment.
• Price: Don’t forget to consider your budget. There are systems available at a range of price points, so you should be able to find one that fits your budget.
• Design: Consider the design complements your kitchen decor, fits well within your available space, and has a convenient faucet design for easy water dispensing. 
• Installation: The ease of installation is important, including clear instructions, user-friendly components, and compatibility with your existing plumbing setup.

Skip down to our Buyers Guide to read more information about each of these key features. But for now, know that by considering these factors, you can ensure you choose an RO water filter that fits your needs and provides you with clean, safe water.

Best Countertop Reverse Osmosis Systems – Overview

• Best Overall: RKIN U1
• Editor’s Choice: AquaTru
• Runner Up: Waterdrop WD-N1-W
• Best High Capacity System: Bluevua Reverse Osmosis System
• Best Value: SimPure Y7P-W UV
• Bonus: Waterdrop K6

Each of these water systems has its strengths and may be the best choice depending on your specific needs and circumstances. We’ll provide a more detailed review of each system later in this article.

Compare the Top Countertop RO Water Filters

Best Countertop Reverse Osmosis Systems Reviewed

#1: Best Overall Water Filter – RKIN U1

Efficiency Ratio: 2:1
Filtration: 5-stage filtration process
Production Rate: 75 gallons per day
Holding Capacity: 0.5 gallons
Certifications or Testing: NSF certified

In our extensive research, the RKIN U1 consistently stood out as a top performer among the best countertop RO water filter products. What makes this system particularly impressive is its high efficiency, boasting an impressive ratio of 2:1. This means for every two gallons of purified water, it produces only one gallon of wastewater, which is significantly better than many other systems on the market.

The RKIN U1 uses a 5-stage filtration process to remove up to 99% of over 1,000 contaminants, including lead, chlorine, fluoride, arsenic, asbestos, and more. It has a production rate of 75 gallons per day, which is more than enough for most households. The system also has a holding capacity of 0.5 gallons, ensuring you always have plenty of purified water on hand.

What we love about the RKIN U1 is its compact design. It doesn’t take up much space on the countertop, making it a great choice for small kitchens. Despite its compact size, it doesn’t compromise on performance. Users have reported a noticeable improvement in the taste and smell of their water after installing this system. Plus, it’s certified by the NSF, ensuring it meets strict standards for water purification.

Pros:

• High efficiency ratio of 2:1
• 5-stage filtration process removes up to 99% of contaminants
• High production rate of 75 gallons per day
• NSF certified

Cons:

• Higher price point than some other systems
• Holds only 0.5 gallons
• Some users reported difficulty with the installation process

#2: Editor’s Top Choice – AquaTru

Efficiency Ratio: 3:1
Filtration: 4-stage purification process
Production Rate: 75 gallons per day
Holding Capacity: 0.75 gallons
Certifications or Testing: NSF certified

In our research, we were particularly impressed by the AquaTru countertop RO filter. What stands out about this system is its impressive efficiency ratio of 3:1. This means that for every three gallons of purified water, it produces only one gallon of wastewater, which is quite efficient.

The AquaTru system uses a 4-stage purification process to remove over 80 contaminants, including lead, chlorine, and PFAs. It has a production rate of 75 gallons per day and a holding capacity of 0.75 gallons, making it a great choice for most households.

What we love about the AquaTru is its ease of installation and minimal maintenance requirements. It’s a plug-and-play system that doesn’t require any plumbing or installation, making it a great choice for renters or those who aren’t handy with tools. Plus, it’s certified by the NSF, ensuring it meets strict standards for water purification.

Pros:

• High efficiency ratio of 3:1
• 4-stage purification process removes over 80 contaminants
• High production rate of 75 gallons per day
• 0.75-gallon holding capacity
• NSF certified and easy to install

Cons:

• Some users reported issues with the customer service
• Some users found the system to be larger than expected

#3: Runner Up – Waterdrop WD-N1-W RO System

Efficiency Ratio: 3:1
Filtration: 4-stage filtration process
Production Rate: 75 gallons per day
Holding Capacity: 0.39 gallons
Certifications or Testing: NSF certified

The Waterdrop WD-N1-W emerged as a reliable and affordable option in our research. We were particularly impressed by its efficiency ratio of 3:1, which is quite impressive for a system in its price range. This means it wastes less water compared to many other systems, making it an environmentally friendly choice.

The Waterdrop WD-N1-W uses a 4-stage filtration process to remove a wide range of contaminants, improving the taste and smell of your water. It has a production rate of 50 gallons per day, which should be sufficient for most households. The system also has a holding capacity of 0.39 gallons, ensuring you always have purified water on hand.

What stands out about the Waterdrop WD-N1-W is its value for money. Despite its lower price point, it doesn’t skimp on features or performance. It’s also compact and easy to install, with a sleek design that looks great on any countertop. Plus, it’s certified by the NSF, ensuring it meets strict standards for water purification.

Pros:

• High efficiency ratio of 3:1
• 4-stage filtration process
• Production rate of 75 gallons per day
• 0.39-gallon holding capacity
• NSF certified

Cons:

• Some users reported difficulty with the installation process
• Some users reported that the system is larger than expected

#4: Best High Capacity Reverse Osmosis Water Filter – Bluevua Reverse Osmosis System

Efficiency Ratio: 2:1
Filtration: 4-stage filtration process
Production Rate: 100 gallons per day
Holding Capacity: 0.5 gallons
Certifications or Testing: NSF certified

For those with high water consumption, the Bluevua Reverse Osmosis System is a standout choice. Its efficiency ratio of 2:1 is impressive, particularly for a high-capacity system. This means it’s designed to minimize wastewater, making it a more environmentally conscious choice compared to similar high-capacity filters.

The Bluevua system employs a comprehensive 4-stage filtration process to tackle a broad spectrum of contaminants, providing you with clean and safe drinking water. It’s capable of producing up to 100 gallons per day, making it a robust solution for large families or small offices.

One of the highlights of the Bluevua system is its generous 0.5-gallon holding capacity, ensuring a steady supply of purified water. Despite its high capacity, it maintains a relatively compact footprint, making it a practical choice for most kitchens.

What sets the Bluevua system apart is its ability to deliver on capacity without compromising on efficiency or quality. Users have consistently praised its performance and the noticeable improvement in their water quality. Furthermore, its NSF certification provides an added assurance of its commitment to stringent water purification standards.

Pros:

• High efficiency ratio of 2:1
• Comprehensive 4-stage filtration process
• Robust production rate of 100 gallons per day
• Generous 0.5-gallon holding capacity
• NSF certified

Cons:

• Pricier than some other filters
• Its size may be too large for some countertops

#5: Best Budget Water Filter Systems – SimPure Y7P-W UV Countertop RO System

Efficiency Ratio: 4:1
Filtration: 4-stage filtration process with UV sterilization
Production Rate: 100 gallons per day
Holding Capacity: 1.5 gallons
Certifications or Testing: NSF certified

For those seeking a balance between cost and performance, the SimPure Y7P-W UV Countertop Reverse system is a standout choice. It offers an impressive efficiency ratio of 4:1, which is quite competitive for a system in its price range. This means it’s designed to minimize wastewater, making it an environmentally friendly choice.

The SimPure Y7P-W UV stands out with its 4-stage filtration process that includes UV sterilization, a feature often found in more expensive models. This process effectively removes a wide range of contaminants and ensures your water is not only purified but also free from bacteria and viruses. It has a production rate of 100 gallons per day and a holding capacity of 1.5 gallons, making it a suitable choice for small to medium-sized households.

What we found appealing about the SimPure Y7P-W UV is its exceptional value for money. It offers features and performance comparable to more expensive models but at a more affordable price point. Users have praised its performance, the quality of the water it produces, and its ease of installation. Plus, it’s certified by the NSF, providing an added assurance of its commitment to stringent water purification standards.

Pros:

• Competitive efficiency ratio of 4:1
• 4-stage filtration process with UV sterilization
• Suitable production rate of 100 gallons per day
• Compact 1.5-gallon holding capacity
• NSF certified
• Exceptional value for money

Cons:

• Some users reported that the UV light needs regular replacement
• Not suitable for large households due to its lower production rate

That concludes our detailed reviews of the top countertop reverse osmosis systems. In the next section, we’ll provide a comprehensive buyer’s guide to help you make an informed decision.

Bonus: Best for Hot Water: Waterdrop K6

Efficiency Ratio: 2.5:1
Filtration: 4-stage filtration process
Production Rate: 75 gallons per day
Holding Capacity: 3 gallons
Certifications or Testing: NSF certified

The Waterdrop K6 stands out in our research as a unique offering in the countertop reverse osmosis market. Its standout feature is the built-in hot water dispenser, providing instant hot water alongside purified drinking water. This feature makes it a versatile addition to any kitchen, perfect for making hot beverages or speeding up cooking preparations.

The Waterdrop K6 doesn’t compromise on efficiency or filtration quality, despite its additional features. It has an efficiency ratio of 2.5:1, meaning it’s designed to minimize wastewater. The system employs a 4-stage filtration process to remove a broad range of contaminants, and it can produce up to 75 gallons of purified water per day. It also has a 3-gallon holding capacity, ensuring you always have access to purified water.

What we appreciate about the Waterdrop K6 is its combination of functionality and performance. It not only provides high-quality purified water but also adds the convenience of instant hot water. Users have praised its performance, the quality of the water it produces, and the convenience of the hot water feature. Plus, it’s certified by the NSF, ensuring it meets strict standards for water purification.

Pros:

• Efficiency ratio of 2.5:1
• 4-stage filtration process
• Production rate of 75 gallons per day
• 3-gallon holding capacity
• NSF certified
• Built-in hot water dispenser

Cons:

• Higher price point due to additional features
• Some users reported that the hot water feature requires regular maintenance

Countertop Reverse Osmosis Buyers Guide

When choosing a countertop reverse osmosis filter, it’s important to understand what these systems are, how they work, and how they compare to other types of water filtration systems. 

In this buyer’s guide, we’ll provide you with all the information you need to make an informed decision.

What Is a Countertop Reverse Osmosis System?

A countertop reverse osmosis filter is a compact, portable water filtration system that sits on your countertop. These systems use reverse osmosis technology to remove a wide range of contaminants from your water, including: 

• Lead
• Chlorine
• Fluoride
• And more

They’re designed to be easy to install and maintain, making them a popular choice for renters and those who aren’t handy with tools.

How Does A Countertop RO System Work?

Countertop RO systems work by forcing water through a semi-permeable membrane under pressure. This membrane allows water molecules to pass through but blocks larger molecules, such as those of contaminants. The result is purified water that’s free from harmful substances.

The process typically involves several stages of filtration. First, a pre-filter removes larger particles like sand and sediment. Then, the water passes through the RO membrane to remove smaller contaminants. Finally, a post-filter polishes the water to remove any remaining tastes or odors.

Countertop RO System vs. Under Sink RO System

Both countertop and under sink RO systems use the same technology to purify water. However, there are some key differences between the two.

Countertop RO Systems

Countertop RO systems are compact and portable. They’re easy to install and don’t require any plumbing modifications, making them a great choice for renters. However, they do take up space on your countertop, which can be a downside if you have a small kitchen.

Under Sink RO Systems

Under sink RO systems, on the other hand, are installed under your sink and connected directly to your water supply. They’re more powerful and can filter larger volumes of water, but they require a more complex installation process. They’re a good choice if you have a larger household and need a lot of purified water.

Countertop RO Water Filter Vs. Countertop Water Filter: Which is Better?

Countertop RO systems and countertop water filters both provide a way to purify your drinking water. However, they do so in different ways and offer different levels of filtration.

Countertop water filters typically use activated carbon or other types of filters to remove contaminants from your water. They’re effective at improving the taste and smell of your water, but they don’t remove as many contaminants as RO systems.

Countertop RO systems, on the other hand, use a semi-permeable membrane to remove a wider range of contaminants, including heavy metals, fluoride, and more. They provide a higher level of filtration, but they’re typically more expensive and require more maintenance.

The best choice depends on your needs. If you’re concerned about specific contaminants like lead or fluoride, a countertop RO system might be the best choice. However, if you’re mainly looking to improve the taste of your water and don’t want to spend a lot, a countertop water filter could be a good option.

Advantages of Using a Countertop Reverse Osmosis System

Countertop reverse osmosis filters offer several advantages:

• Effective Filtration: Countertop RO systems use a multi-stage filtration process, including a semi-permeable membrane, to effectively remove contaminants from your water. They can remove a wide range of impurities, including heavy metals, chemicals, bacteria, and viruses, ensuring that you have clean and safe drinking water.
• Compact and Portable: These systems are designed to be compact and portable, making them ideal for those who rent their homes or have limited space. They can be easily installed on the countertop and do not require complex plumbing modifications. You can also take them with you when you move to a new location.
• bCountertop RO systems typically have user-friendly designs and straightforward installation processes. They often come with intuitive controls and indicators to monitor system performance. Additionally, the purified water is dispensed through a separate faucet, allowing you to have access to both purified and tap water at your convenience.
• Cost-effective: Compared to larger, whole-house RO systems, countertop models are generally more affordable. They offer an economical solution for obtaining high-quality drinking water without the need for costly plumbing modifications or professional installation.

Disadvantages of Using a Countertop RO System

While countertop reverse osmosis systems have numerous benefits, there are a few potential drawbacks to consider:

• Limited Water Production: A countertop reverse osmosis system has smaller production capacities compared to under-sink or whole-house systems. They are suitable for smaller households or individuals with moderate water consumption. If you have a large household or require a significant amount of purified water daily, a countertop system may not meet your needs.
• Limited Storage Capacity: The holding tanks in countertop RO systems have limited storage capacity, typically ranging from 1 to 5 gallons. If you require a constant supply of purified water or have higher water demands, you may need to refill the tank frequently.
• Space on Countertop: Countertop RO systems require space on your countertop for installation. If you have limited counter space or prefer a clutter-free kitchen, the presence of the system may be a consideration.
• Not Suitable for All Water Sources: Countertop RO systems are generally designed for use with treated municipal water supplies. If you have well water or water from other non-standard sources, additional pre-treatment or specialized systems may be required to ensure optimal performance.

What to Look For In A Reverse Osmosis Water Filter System

When choosing a countertop RO system, there are several factors to consider. Here are some key features to look for:

Contaminants Removed

Different RO systems are designed to target specific contaminants, so it’s important to understand the specific contaminants you want to remove from your water. Look for a system that can effectively remove common contaminants such as:

• Chlorine
• Lead
• Fluoride
• Pesticides
• Herbicides
• Volatile organic compounds (VOCs)

Additionally, consider if the water filter system is capable of addressing specific contaminants that may be of concern in your area, such as arsenic or nitrates.

Ensuring that the water filter can successfully remove the contaminants you’re concerned about is crucial to providing you with safe and clean drinking water.

NSF Certifications

When selecting a reverse osmosis system, it’s essential to choose one that has been certified by the NSF (National Sanitation Foundation). NSF certification ensures that the water filter system has been thoroughly tested and meets stringent standards for water filtration and contaminant reduction. 

Look for systems with NSF certifications, such as NSF/ANSI Standard 58, which specifically applies to reverse osmosis countertop water filter systems.

Choosing an NSF-certified system provides an added level of assurance that the system has undergone rigorous testing and validation for its performance and contaminant reduction capabilities.

Water/Filtration Capacity

Consider your household’s water consumption needs when evaluating the water/filtration capacity of a reverse osmosis system. The production rate indicates the amount of purified water the system can produce per day. It’s important to choose a RO countertop water filter with a production rate that meets your family’s demands. 

If you have a larger household or anticipate higher water usage, opt for a system with a higher production rate.

Additionally, consider the holding capacity of the countertop RO water filter. The holding tank stores the purified water until you need it. If you require a larger supply of purified water readily available at all times, choose a system with a larger holding capacity

Ensuring that the system can meet your household’s water needs is essential for continuous access to clean and purified water.

Water Pressure

Water pressure plays a crucial role in the performance of a reverse osmosis system. It’s important to ensure that the water pressure in your home is within the range recommended by the system manufacturer. Low water pressure can affect the system’s production rate and filtration efficiency.

If your home’s water pressure is below the recommended range, consider installing a booster pump to increase the water pressure and optimize the system’s performance.

Flow Rate

Flow rate refers to the speed at which purified water flows from the faucet. It’s important to consider the flow rate of a countertop reverse osmosis product, especially if you require a large amount of purified water in a short period. 

A higher flow rate can be beneficial for filling up containers or for applications that require a substantial amount of water, such as cooking or brewing

Choosing a system with an appropriate flow rate ensures efficient water usage and meets your specific needs for water delivery.

Remineralization Needs

During the reverse osmosis process, beneficial minerals can be removed along with the contaminants. Some systems offer remineralization filters or cartridges to reintroduce essential minerals such as calcium and magnesium back into the purified water. 

If you prefer remineralized water or if your source water is low in minerals, consider a system that includes this feature.

Remineralization can enhance the taste and overall quality of the purified water, ensuring it is both clean and enriched with essential minerals.

Wastewater Ratio

Reverse osmosis systems produce wastewater as part of the filtration process. The wastewater ratio refers to the amount of wastewater generated for every gallon of purified water produced. It’s essential to consider the wastewater ratio of a system, as high wastewater production can be wasteful and impact your water bills.

Opt for a system with a lower wastewater ratio, as this indicates a more efficient use of water and better conservation practices. Some systems incorporate technologies or features to reduce the wastewater generated, making them more eco-friendly options.

Maintenance Requirements

Regular maintenance is crucial to keep a reverse osmosis system operating optimally. Consider the maintenance requirements of the system, including filter replacements and overall upkeep. Some systems feature indicator lights or alarms that notify you when it’s time to change filters, simplifying the maintenance process.

Evaluate the frequency and cost of filter replacements and whether they can be easily sourced. Additionally, consider the system’s overall maintenance needs, such as cleaning or sanitization requirements. Choosing a system with manageable maintenance requirements ensures that you can effectively maintain its performance over time.

Warranty

A warranty provides assurance and protection for your investment. Check the warranty offered by the system manufacturer, including the coverage period and what it includes. A longer warranty period is often an indication of the manufacturer’s confidence in the system’s quality and durability.

Consider warranties that cover both parts and labor, as this can save you from unexpected expenses in case of any malfunctions or defects. Additionally, check if the warranty is limited to specific components or if it provides comprehensive coverage for the entire system.

A reliable warranty provides peace of mind and ensures that you can rely on the system for years to come.

Price

While price shouldn’t be the sole determining factor, it’s important to consider your budget when you buy a reverse osmosis system. Determine the price range that you’re comfortable with and look for systems that offer the best value within that range

Compare the features, specifications, and performance of systems in your budget to make an informed decision. Remember, a higher price doesn’t always guarantee better quality, but it can indicate additional features, higher filtration capacity, or improved overall performance.

Strike a balance between your budget and the system’s features to find the best option that meets your requirements without breaking the bank.

Countertop RO systems range in price from around $100 to over $500. Keep in mind that more expensive systems often have more features and better performance, but there are also many affordable options that offer great value for money.

​​Design

The design of the countertop RO system is another one of the important things to consider. Since the system will be sitting on your countertop, you’ll want it to blend well with your kitchen decor. Look for a system with a sleek and modern design that complements your kitchen

In addition to aesthetics, consider the size of the system. Make sure you have enough space on your countertop to accommodate it. Some systems are big, while others are more compact. If space is a concern, look for a smaller model.

Also, consider the design of the system’s faucet and how it dispenses water. Some systems have a separate faucet, while others dispense water directly from the unit. Choose a design that’s convenient and easy for you to use.

Installation

When considering a countertop RO system, it’s important to assess the installation process. Look for a system that offers easy installation without the need for complex plumbing modifications or professional assistance. Systems that come with clear instructions and user-friendly components can make the installation process smoother and more convenient.

Additionally, check if the system requires any additional tools or equipment for installation. Some systems come with all the necessary components, including tubing and fittings, while others may require separate purchases. Ensure that you have everything you need, or consider purchasing a system that provides a comprehensive installation kit.

Make sure you take note of any potential compatibility issues with your existing faucet or sink setup. Ensure that the system you choose can be easily connected to your current plumbing without any major modifications or additional adapters.

Final Thoughts: Which Filter Should You Buy?

Choosing the best countertop reverse osmosis filter can significantly improve the quality of your drinking water. Whether you’re concerned about specific contaminants, looking for a system with a high capacity, or need a budget-friendly option, there’s a countertop reverse osmosis water filter out there that’s perfect for you.

In our research, we were particularly impressed by the RKIN U1 for its high efficiency, comprehensive filtration, and user-friendly design. However, all the systems we reviewed offer great performance and value in their own right.

Remember, the best countertop RO system for you depends on your specific needs and circumstances. Consider the factors we discussed in the buyer’s guide, such as the contaminants removed, NSF certifications, water capacity, flow rate, and current price, to find the system that’s the best fit for you.

Investing in a countertop RO system is an investment in your health and well-being. With clean, purified water at your fingertips, you can hydrate with confidence, knowing you’re drinking the best water possible.