Best Water Filtration Systems of 2025

"I am extremely pleased with the quality of the product and the amazing taste of the drinking water. The installation was so simple that even a child could do it. The YouTube instructions were perfect, and I actually enjoyed setting it up. I bought an open box on Amazon, and although it was missing a small part, iSpring's customer service was unbelievable. They took care of everything, and I couldn’t be happier with the service and product. If you’re looking for a good reverse osmosis system, this is the one. I would give them 10 stars if I could!"

"I have to say, I am very satisfied with this water filter! The installation was simple, and the quality of the filtered water is excellent. It tastes much better than before and is much clearer. I especially love that the filter removes smaller particles and chlorine, which improves the taste and smell of the water. The price-to-value ratio is top-notch, and I can only recommend this filter. A worthwhile investment for clean and healthy drinking water!"

"The reverse osmosis system is fantastic. In just four days, it fulfilled its promises by filtering and significantly reducing the ppm in my city water. I saw a drop from 380 ppm to about 25 ppm (after removing the remineralization cartridge as a personal choice). It takes some time to wash everything out, but that’s normal. Make sure to fill and empty the 12-liter tank completely before drinking. The customer service is superb—efficient and very helpful!"

"I absolutely love this system. Having unlimited clean water at home has been a game changer, especially during these times. The price is reasonable compared to delivery services, and I appreciate the quality of the filters."

"This is my second system. Installation was straightforward, and I was impressed with how clean the faucet has remained over the years. The water quality is fantastic; it outperforms any fridge filter I’ve used."

"I recently bought the SimPure Y7P Series Water Filtration System, and I’m impressed with its performance. The taste and quality of the water is clean, fresh, and has no aftertaste. It's sleek and doesn't take up much counter space. Installation was straightforward, and it operates quietly, making it perfect for daily use. Overall, the SimPure Y7P has exceeded my expectations—an excellent investment for anyone seeking a reliable water filtration system!"

"I live off well water in Texas and initially struggled with its taste. After testing, my water came in at 849 ppm, way above the drinkable limit. I decided to get this device, and the setup was quick and easy. After a few cycles, my water tested at 30 ppm—a huge improvement! I can’t tell the difference between this and bottled water, which I used to buy. This device has two filters and UV purification, processing around 528 gallons before needing a change. It’s been a game changer for me!"

"I’ve had this unit for about 5 months now, and while I faced some issues with leaking, it’s primarily due to my heavy usage. I recommend replacing the filters more often than suggested to avoid leaks. The layout is well-designed, and even with some minor issues, the taste of the water is great. It’s perfect for my apartment, and I appreciate that it doesn’t require any installation beyond changing filters. After replacing the filters, my water quality improved significantly, and I’m overall happy with my purchase!"

"After returning from our Caribbean getaway, I was shocked by the taste and smell of our drinking water in Oshawa, Canada. To avoid any health risks, we decided to install the whole home heavy metals filter, and the difference was immediate. I now strongly recommend this product for anyone concerned about the risks of municipal water."

"I installed this filtration system and noticed a 100% improvement in my water quality. I even replaced all my old water lines before installation, and right from the first shower, the difference was remarkable. It's absolutely worth the investment!"

"Living on a municipal well, I noticed that my water quality had been declining for years, often appearing yellow/brown. After installing the heavy metals filtration system with a sediment pre-filter, I was amazed at how quickly the water became clear. A tip for installation: I used shark bite fittings, which made it easy to tighten any leaks without having to re-solder. This system has truly transformed my water!"

"I find this water purifier to be an excellent machine. It delivers clean, crisp-tasting water with impressive filtration efficiency. The installation was straightforward and the filter replacement indicators are very helpful, ensuring I always have the best water quality. Overall, it's a reliable and well-built purifier that offers great value for its price. I highly recommend it!"

"After using this RO water purifier for a week, it has exceeded all my expectations. It efficiently removes impurities, making a noticeable difference in taste."

"We live in an area with high particulates in our water, and after extensive research, I chose WaterDrop products for their great design. The installation was a breeze, aside from my unique challenges. The water quality is outstanding, with TDS dropping significantly, and everything tastes better now."

"I found this the best health purchase we've made in a while! The product arrived quickly and included extra filters for all filtration stages. Installation was simple, and I was able to customize it to provide filtered water to my ice maker and hot water heater. I appreciated the assistance from the seller regarding the covers for the filters. The water quality improved significantly, and the ice was clear, which was impressive!"

"We already had decent water, but I was concerned about some chemicals. The installation wasn't too difficult, but I faced a few minor challenges. The instructions lacked dimensions, which made it tricky in my confined space. Overall, the water tastes good, and I noticed that flavored drinks taste better. After a few months, I've had no complaints, although a replacement schedule for filters would be helpful."

"I had a great experience installing this system. The instructions and videos were very clear. I had a couple of minor leaks, but they were due to my adjustments rather than the system itself. My TDS reading was at 9, which is excellent for drinking water. I’m thrilled with this osmosis system and consider it a great value!"

"Now living in NYC as a renter, I found this cold water under sink filter to be a game changer. It was easy to install and works effectively. After running it for a few minutes, the water went from cloudy to crystal clear. I feel much more confident cooking with this water compared to my old pitcher filter. The only downside is that I can't filter hot water."

"Having used a Waterdrop pitcher for years, I was excited to try this system. Installation took me 10 minutes, and I was thrilled to find that it required no switches and maintained water pressure. The water tastes fantastic, and the filter should last about a year. I should have tried this sooner!"

"As someone who depends on purified water, I am extremely pleased with this filter. I used to lug bottles home, but now I have clean, great-tasting water directly from the tap. The installation was straightforward, and I’ve noticed no loss of water pressure. This filter has exceeded my expectations, especially with my community well's poor-tasting water!"

"I feel extremely excited writing this review. After hours of searching, I chose this water filter system for its exceptional value and thorough filtration. It doesn't require periodic filter changes, making it cost-effective. Installation was a breeze, and the water tastes crisp and pure. We’ve been using it for over a month, and it saves us $50 weekly on bottled water. Plus, the customer service is outstanding; they provided guidance during installation and shipped necessary accessories for free. We are thrilled to be part of the Cuzn family!"

"I decided to try the CuZn system after years of using jug filtration. The installation was simple and it’s so convenient to have filtered water straight from the tap. The taste is recognizably better than jug-filtered water—clean and crisp without any aftertaste. Although the initial cloudiness clears quickly, it's a minor issue compared to the overall value. I highly recommend this system for anyone seeking quality filtration!"

"After just six months of using this product, I'm impressed with its efficiency and the purity of water. The price has dropped by 30%, making it a fantastic investment. When I noticed a chlorine taste, the company quickly sent me a replacement filter and a complimentary pre-filter. Their customer service is truly incredible, and the installation was a piece of cake. I’m very satisfied!"

"My husband and I decided to purchase a water filter after the East Palestine, Ohio train derailment. We wanted something more effective than a mainstream Brita water filter. The Berkey filters out forever chemicals and more than 200 contaminants. Setting it up was straightforward, but I struggled with priming the elements due to the faucet adapter. I love that the filters last 11,000 gallons, making them worth the price. Once set up, just pour water in and you're ready. The taste of the water is amazing, rivaling our favorite bottled water. My family laughed at our purchase, but now they want one too!"

"I’m very satisfied with this product. It's easy to dispense water, and the taste is fantastic. I added the fluoride/arsenic filters for extra purity. I appreciate that I still get important trace minerals, unlike with an RO filter."

"We really like our Big Berkey. It filters water quickly and easily. Having used a reverse osmosis system for over 30 years, I must admit the taste was better with RO. However, the Berkey is on the countertop, preventing leaks that wrecked our cabinets. Though I notice some mineral buildup, we value the no-leak feature. In case of a disaster, we trust the Berkey to filter our well water for drinking. It's easy to fill, doesn't waste water, and looks beautiful on the counter!"

"As a DIY homeowner, I was struggling with intense sulfur smell and heavy sand buildup in my well water. After installing the iSpring whole home water filtration system, all my problems were solved! The sulfur smell is completely gone, and there's no more sand in my bathtub. Their customer service has been excellent, and I highly recommend iSpring!"

"I needed to replace an older filter system for my well water and decided to try iSpring based on positive reviews. I was pleasantly surprised by the quality of the products and the excellent technical support. After following their recommendations, I installed a combination of filters, and now I have crystal clear water with no odor. Everything works flawlessly, and I give them 5 stars!"

"I purchased the iSpring system to address issues with sediment and iron manganese in my well water. Just two days after installation, I noticed major improvements! Sean from their support team was incredibly helpful in selecting the right product, and Nic also provided great assistance during installation. Overall, I'm very satisfied with the outcome of my water quality!"