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The right under sink water filter for well water can effectively remove a broad range of harmful contaminants protecting your health and also improving water aesthetics.
What’s more, quality systems are easy to DIY-install, and maintenance is all the more simple especially with long-lasting filters. Convenience of use? Check!
Not to mention that you save valuable space on your countertop…
But, how to find the best under sink water filter for well water for your needs? This guide will help you out and prevent you from wasting your money on an inferior product!
On This Page You Will…
Best Under Sink Water Filter for Well Water: Clearly Filtered 3-Stage
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Type: 3-Stage Under Sink Filter, Inline
Filter Life: 2,000 gal
Testing & Certs: NSF 42, 53, 401
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Best for RO Purification of Well Water: Crystal Quest 1000C
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Type: Reverse Osmosis
Filter Life: Varies
Testing & Certs: –
Warranty: 1 Year
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Best Budget Option: Epic Smart Shield
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Type: One Stage, Inline
Filter Life: 650 gal
Testing & Certs: NSF 42, 53, 401
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In our opinion, the best under sink water filter for well water in 2022 is the Clearly Filtered 3-Stage. In fact, it is one of the top filtration systems you will ever find. Why?
It is mainly because an independent lab has tested this unit to eliminate 200+ contaminants, such as heavy metals, bacteria, viruses, and all sorts of chemicals commonly found in well water.
Besides, the unit is super user-friendly. Its maintenance and installation are easy, too, Thus, many customers use and recommend the under sink water filter to their friends and family.
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Clearly Filtered 3-Stage Under Sink Well Water Filtration System
|Filter Type:||3 Stages, Inline|
|Filtration Capacity:||2,000 gal|
|Testing:||NSF 42, 53, 401|
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The Clearly Filtered 3-Stage is best for people who want a compact, easy to install and use, and very effective under sink well water filter.
If you use well water to quench your thirst and cook, the Crystal Quest 1000C & 1000CP may strike your fancy. Both under sink water filtration systems are designed specifically for well water. However, they aren’t NSF-tested unlike the above option and so came in second.
By the way, the units are completely identical except that the 1000CP uses an electric pump to increase water pressure. This provides for faster filtration and reduces wastewater.
Other than that, we have 12 different filter stages which can conveniently eliminate all the contaminants that might be present in your well water.
Moreover, if you want to kill 99.9% of all microorganisms infesting your water, you can install a 13th filter stage on any of the 2 systems to convert the Quest 1000C and 1000CP into the 3000C and 3000CP, respectively.
Crystal Quest 1000C
|Filter Type:||RO System, Separate Faucet|
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These Crystal Quest systems are best for heavily contaminated well water.
If you are looking for a quality under sink filter on a restricted budget, the Epic Smart Shield is quite amazing in treating your well water. The system is a non-RO unit that can remove more than 70 contaminants such as asbestos, lead, chlorine, E. Coli, and cyst.
Besides, the good news is that this filter is NSF-certified.
Epic Smart Shield Under Sink Water Filter
|Filter:||One Stage, Inline|
|Filtration Capacity:||650 gal|
|Certifications:||NSF 42, 53, 401|
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The Epic Smart Shield is by far the best budget under sink water filter for well water.
If you are looking for an effective under sink reverse osmosis system to treat your well water, the Aquasana OptimH2O is also worth the consideration. Aside from removing different harmful substances from water, it adds back all the healthy minerals lost during the filtration process; minerals that you might require for your daily nutritional intake.
Of course, that’s quite unlike a traditional RO under sink filter, and that’s the best thing about the Aquasana OptimH2O. The remineralization process proves quite beneficial in improving your water’s taste and balancing its pH value, too.
Aquasana OptimH2O Under Counter RO Water Filtration System
|Filter Type:||RO System, Dedicated Faucet|
|Filtration Capacity:||6-12 Months|
|Certifications:||NSF 42, 53, 58, 401, P473|
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The Aquasana OptimH2O is best for people who want an NSF-certified under sink RO system for guaranteed contaminant removal that also applies remineralization.
Do you have limited space under your kitchen sink? If yes, consider buying a tankless under sink water filter for your well, like the Waterdrop G3, to overcome this problem.
Although this is an RO system, it doesn’t require a storage tank. Instead, the Waterdrop G3 works on demand. How? With the help of a built-in water pressure pump.
Moreover, this filter has a robust design, an effective RO membrane, installation is quick, and it can reduce many contaminants present in well water. All these amazing factors make this unit worth a 4-star from our side.
Waterdrop Tankless Under Sink RO Filter System
|Filter Type:||RO System, Own Faucet|
|Filtration Capacity:||550-2,200 gal|
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The Waterdrop WD-G3-W is best for people who want a tankless RO system for their well water supply.
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|Clearly Filtered||$$$||Inline||2,000 gal||42, 53, 401||$400|
|Crystal Quest 1000C & 1000CP||$$||RO||Varies||–||~$100-155|
|Epic Smart Shield||$||Inline||650 gal||42, 53, 401||$110|
|Aquasana OptimH2O||$$||RO||6-12 Months||42, 53, 58, 401, P473||~$180-220|
|Waterdrop WD-G3-W||$$$||RO||550-2,200 gal||58||~$115|
The following are things worth considering before you go out and buy a under sink water filter for your well water supply. These are also the very same criteria we focused on when picking our top products for this guide.
Undoubtedly well water is great, mainly because it’s free and also because there’s lots of it. However, if your water comes from a private well on your property, you need to make a little more effort to make it suitable for drinking.
Most importantly, you must get your well water tested annually since the chemical properties can change over time. A well water test will point out potential issues with bacteria and other microorganisms or contaminants like nitrate and iron. Only be knowing your water quality in the first place can you decide on the right method(s) of treatment.
Most of the time, you can’t just install a filter under your kitchen sink and run raw well water through it. Not only could the water contain dangerous and disease-causing pathogens, it may also be laden with sediment, iron, hardness minerals or other impurities that would clog any point-of-use water filtration system immediately.
Remember: Compared to city water, well water has never seen the insides of any water utility.
In other words, pre-treatment is often required. This could mean shock-chlorinating your well once every 6 months or installing a whole house sediment pre-filter. In fact, that’s exactly what most private well owners choose to do – installing a whole house water filter removing sediments and other dirt to prevent buildup in the plumbing system and water-based appliances.
Unless you have a sediment whole house filter, you will have to look for an under sink system with a robust sediment filter stage (preferably with a pleated surface) to remove most sediment before it clogs subsequent filters.
The same principle applies for other contaminants like those mentioned above.
As a consumer, NSF certifications are the easiest way to gauge a water filter’s ability to remove contaminants. Therefore, when comparing multiple models, styles, or brands, make it a point to select the one which is NSF-certified to ensure all claims are valid. Why is that so?
NSF is an independent organization that tests and certifies products for food and health safety based on strict benchmarks. When shopping for an under sink well water filter, you must look for these NSF certifications:
Depending on your water test report, you can select an under sink water filter system with any of these technologies:
The ideal under sink filter will have multiple levels of filtration to provide you with clean drinking water.
The general principle states the more filter stages a system has, the better the quality of the output water will be.
Although more stages ensure thorough filtration, it means your water flow could be affected. Speaking of…
Flow rate refers to how much water flows out of any given faucet or filter in a set time span. In contrast, water pressure refers to how quickly and with what force water is dispensed.
Most residential wells are equipped with pressure tanks that control the water pressure as it flows from the well to your home. Since under sink water filters rely on water pressure to work, you must ensure your house has around 60 psi.
Besides decreasing the flow rate and pressure on your faucet, poor home water pressure can also result in poor filtration.
What’s more, it’s important to note that faucets without any filter attached can supply water at the rate of roughly 1.5-2.0 gpm. However, no water filter can match that raw flow rate.
Typically, systems that use a dedicated faucet have a flow rate ranging from 0.5 to 1.5 gpm. And single-stage under sink filtration units will provide you with better water pressure compared to multi-stage systems.
You can install an under sink well water filter all by yourself, provided you are not “tool-challenged”. For all others, hiring a pro is the right way to go.
If you are going with a pro, we advise always taking opinions from two plumbers. Many oblivious homeowners end up paying a fortune for a job that could be done quickly in under an hour. Expect to pay $200 for your under sink filter installation.
With that said, under sink systems that come with dedicated faucets cost more to install. Nevertheless, we recommend getting one if possible so you can use unfiltered water for washing vegetables/fruits and doing the dishes. This means your filter will last longer, and you will notice a reduction in annual maintenance costs.
Always look for an under sink water filter system that is easy to maintain. Since you will be replacing filters every six months, you must get a unit that has easy-to-change cartridges. It’s no fun spending an entire day with your water filter when it’s due for a replacement.
Besides saving time, an easy-to-maintain filter will save you from paying exorbitant service costs if you are not handy around the house.
If you compare the various models of under sink water filters available on the market, you will notice most of them need replacements every six months to a year. While it’s a game-changer compared to faucet filters, you might still be interested in a system that can go as long as possible before filters reach the end of their capacity.
Most cartridges perform the same way; therefore, a longer service life indicates better construction and high-quality materials. Of course, you can expect to pay more for an under sink water filter that lasts longer.
When shopping, it’s wise to estimate the total average filter replacement cost per year. If you buy a low-cost unit that needs expensive cartridge replacements every few months or so, you’ll incur high annual costs later on.
Most under sink filtration systems will fit easily inside any cabinet. But if you are short of space, you must look for one that takes as little room as possible.
Needless to say, simple inline filters occupy less space than multi-stage or reverse osmosis systems.
Last but not the least; consider your budget before making a purchase. In the case of under counter water filtration systems, the most expensive one is not always the best (true for many products). This is because they often come with additional features that you might not need.
Thankfully, there are so many models on the market. So, you can easily find one that fits your wallet. For example, a simple undersink water filter can cost as low as $80, while some heavy-duty ones can come in at around $500.
More on Under Sink Water Filters for Well Water
An under sink water filter is a point-of-use system that delivers filtered water on demand.
That said, there are almost no systems designed for private well water specifically. That’s why we recommend using a regular under sink water filter in conjunction with pre-filtration.
This is because water from a private well can be high in sediment, iron, scale, and more. Highly sedimented water, for example, will choke any under sink filter instantaneously – thus it needs prior treatment.
Here are a few types of under sink water filters that you can choose from if you use water from a private well.
An inline under sink water filter will connect your filter directly to the cold water tap on your sink. While the idea of a single faucet sounds appealing and convenient, you don’t need filtered water to do your dishes or wash your vegetables, do you?
This is why some under counter water filters are equipped with a separate faucet. Setting up a dedicated dispenser helps minimize the wastage of precious filtered water. Moreover, it means your filter cartridges will last longer.
These simple devices employ only one filter element. But it’s not necessarily a bad thing!
Suppose the water from your private well is microbiologically safe, and you are already using a whole house water filter for sediment, then a simple carbon under sink filter could be a great option.
Most conventional under sink water filters feature multiple stages of filtration. Some have two, while other sophisticated systems have 5 or more stages.
A reverse osmosis system is one of the best options for people using water from a private well (with pre-filtration!). RO treats your water down to a molecular level.
The bad news is that RO filters remove the good guys, along with the bad ones. So basically, your water is devoid of healthy nutrients and minerals needed by your body. Secondly, RO systems are not exactly eco-friendly. Without a pump, 3 to 4 gallons of water are flushed down the drain for every gallon filtered.
An under sink well water filtration system can help you in more ways than one. Here is what we love, plus the limitations of these units.
Anyone who suspects their water supply – whether city water or well water – is overly contaminated should install an under sink water filter right away.
The good news is that installing an under sink well filtration system is a piece of cake, especially if you are handy with the toolbox. The bad news? If yours comes with a separate faucet you will need to drill the countertop.
Most systems are installed in the same way by cutting into the cold water feed line and then establishing the outlet connection to the faucet. If your filter is marked as DIY installation-friendly, you can save tons of money on expensive plumber charges.
Here’s how the install process goes:
Under sink water filters can last at least six months to a year, depending on the type of cartridge used. Remember to take into account your daily water usage.
Another crucial factor to consider: Feed water quality. This is all the more important when it comes to well water. A filter element that may last 12 months on a city supply could clog up within 5 months on a well.
The only difference between the two filtration systems – under-sink and countertop – is that one is installed on the counter while the other is stashed neatly inside the cupboards beneath. They are almost similar in price, use the same technologies, are equally efficient and durable.
The decision is simple; if you are bothered by clutter on your countertops or don’t want to compromise on the interiors of your kitchen, you can chalk the countertop water filter off your list. On the other hand, if you have minimal space under the sink or want to see your water passing through the filter stages, you should not select an under sink water filter.
I hope this list of the best under sink well water filters was helpful. Questions? Ask away!
And keep in mind: We’ll add new reviews occasionally. So come back for more!