How confident are you that the water coming out of your tap is actually safe? It’s something most of us don’t think about until there’s a problem.
Clean, filtered water is essential for staying healthy, but the truth is that tap water isn’t always as clean as it looks. Different contaminants require different solutions, and that’s where understanding water filter cartridge types comes in.
Below, we’ll break down the 8 main types, how each one works, and which setups make the most sense for different situations.
Activated Carbon Filter
A lot of chemical and harmful substances like copper, lead, and more found in tap water are odorless and tasteless. Most people are unaware that they’re drinking contaminated water.
So, the use of water filters is necessary.
This is the most common among all water filter cartridge types. Made with a variety of organic materials such as coal, wood, coconut, and more, this filter consists of several pores that attract and trap harmful substances through a process called adsorption. For a deeper look at this technology, read our carbon block water filter guide.
It’s responsible for filtering out the most harmful substances like chlorine-based chemicals, volatile organic compounds (VOCs), and other substances that make a foul odor and weird taste in the water. See our dedicated chlorine water filter article for more details. Plus, as it removes most toxins, it leaves the minerals needed in our bodies.
As effective as it’s, there are still some impurities that can pass through carbon filters. Its main disadvantage is that it will eventually become clogged and need replacement, meaning it’s a bit costly.
But still, most people love carbon filters because they’re cheap, very easy to install, have a long filter life, and don’t use electricity. Thanks to these filters, we can now produce much cleaner water than bottled waters.
Ceramic Filter
It’s a traditional method of water filtration that’s used around the world. This type of filter uses a flower-pot shape that can hold enough gallons of water.
It then goes through a filtration system and waits for the water to drop into a receptacle.
Just like the carbon filters, ceramic filters also have tiny pores that trap larger debris and bacteria out of the water. The ProOne water filter is a popular modern ceramic filter worth considering. What makes ceramic filters unique is that they consist of a silver lining that discharges positively charged metal ions that effectively remove bacteria and sediments.
However, it’s a slow process of filtration, and it’s not effective in removing viruses or total dissolved solids (TDS). It needs proper cleaning and a change of cartridge.
People still choose ceramic filters because instead of a countertop water filtration system, these filters are installed under the sink or used as a portable filter outdoors. This water filter is also useful for collecting water in streams and lakes.
The ceramic filter process of filtration is just like the way the Earth purifies its water.
Alkaline Ionizer Filter
Most people today remain concerned with the pH level of water, and so alkaline ionized filters became a fast-growing type of water filtration. In this filter, a process called electrolysis is used, which is good for “softening” the water.
That means it removes limescale.
The water will pass through some plates that are electrically charged. It will then be separated into two streams.
These two streams are alkaline and acidic.
It also consists of ion-activated mineral rocks. When your water passes through them, the water will receive mineral content.
With this process, we now have drinking water low in acidity, and it boosts up the pH level that will balance your water.
Alkaline Ionizer filter produces water that’s more hydrated and healthy for your body. It also helps to increase the body’s pH and helps to easily reduce a lot of toxins and conditions.
Initially, these filters were made for medical use, and later on, used for domestic purposes.
Sediment Filters
No one would love to drink water that has visible particles. Sediment filters are responsible for removing particles like dirt, sand, dust, rust, and more.
It’s a commonly and widely used water filter in different establishments, also if the water comes from a lake or river. This type of filter is made from wound string, rigid foam, but mostly from melt-blown polypropylene, which is great because it’s resistant to bacteria.
It comes with different filtering sizes, each has a specific particle size it can remove. How effective a filter is and what it can filter are determined by a micron rating, the most commonly used is one micron.
If the micron is lower, it means stronger filtration but only with a slow flow of water. Different micron ratings work as follows:
- 5 micron or larger can remove most particles that are visible to the naked eye, as these large particles are blocked
- 1 micron is most commonly used and can remove particles that are too small to see without a microscope
- 0.5 micron can remove cysts like giardia and cryptosporidium
Unfortunately, even with a micron rating, sediment filters can’t filter out microscopic organisms and chemical substances. They can only remove solid particles.
That’s why they’re added to other filters like activated carbon or reverse osmosis water filters, making them a pre-filter or the first stage in the water filtration system. Learn more about multi-stage water filters that combine these technologies. Another thing to look out for is you need to replace the cartridge regularly, which is simple and easy.
Reverse Osmosis Water Filter
In reverse osmosis filters, the process involves reversing the flow of water. It may sound difficult to understand.
To simply put, the contaminated water is forced to pass through a thin membrane by high pressure.
The clean water passes through from a more concentrated solution to a diluted solution, while the contaminants are left. Reverse osmosis water filters work well in removing most pollutants, but they’re not effective in filtering out bacteria.
Nevertheless, they’re still popular for their ability to remove all sorts of contaminants and produce the cleanest possible drinking water. Another disadvantage of this type of filter is that it produces a lot of water waste.
This water waste or contaminated water goes down the drain, while the clean water is separately going to a container or the tap. Even though the process of filtration is really slow, it still shows a promising result.
Cleaning and changing of the filter are necessary to avoid the buildup of bacteria. Read about the dangers of not changing your water filter to understand why this matters. Another thing to consider is that reverse osmosis water filters use electrically powered pumps that can cost money.
Although there are common ones that can be used without electricity, it’s safe to consider what will benefit you more with results.
Proper cleaning may prolong the lifespan of this type of filter up to 2 to 3 years.
UV Filter and Infrared Filter
Technologies nowadays evolve, and developments are made specially to help us more in our everyday living. UV filters are the newest technology in water filtration.
This process is also called ultraviolet germicidal irradiation. Filtering water with UV light is unique and environmentally friendly, and it doesn’t need any chemicals or substances.
First, the water goes through a glass or a stainless steel chamber. The water will then be exposed to an intense UV light from generated UV lamps, with a heat that’s at least 104 degrees Fahrenheit (40 degrees Celsius).
Some will set up a screen to protect the lamp so it won’t cool down.
The intense heat will kill harmful organisms like bacteria, parasites, and viruses. Although it’s effective at removing organisms, it doesn’t filter out contaminants like minerals and lead.
Third world countries mostly use this kind of filter as their water system, especially for large properties in rural areas. The water tanks that we usually see in those areas heavily rely on UV filtration for clean and safe water.
UV filters are a quick and easy way to filter your water that won’t affect the taste or quality of it. They’re especially effective against bacteria like E. coli. Read more about whether water filters remove E. coli. Think thoroughly about considering a UV filter because some of them are expensive and need to work with energy.
On the other hand, an infrared filter is commonly used in areas that don’t have a good source of clean water. The water filtration process of the infrared filter uses heat and light that will negatively charge the water and will give it a softer feel like an alkaline filter.
Water Distillation
Zero installation water filters are popular in today’s time because a lot of people are busy with either school or work. Unlike the reverse osmosis water filters and alkaline ionizer filters, this process of water filtration is the simplest and has very high efficiency.
It’s also known for its ability to remove the highest level of contamination in the water, such as viruses, lead, fluoride, and arsenic. First in the process is to boil the water, where the bacteria are destroyed.
Those that can’t turn into steam, like minerals and other impurities, are left and will clean automatically or manually.
It will then capture the steam and cool it back down. Then, in a separate container is the purified water.
Simple, easy, and effective.
With water distillation, most contaminants are removed and it also kills bacteria. Interestingly, boiling is one of the oldest methods in water purification that’s still used to this day.
However, to produce a small amount of water it will take a long time because it’s a very slow process. Aside from drinking and cooking, distilled water can also be used as a humidifier, for cleaning, and in irons.
A replacement for filter cartridges isn’t often needed, but it’s still considered expensive because of its maintenance and its high use of electricity. Also, its price in the market is a bit costly, but the lifetime service it can give to your family is a great investment.
With proper cleaning of the filters, a water distiller can last 10 to 15 years.
Activated Alumina Water Filter
Most commonly used desiccant or a hygroscopic substance used as a drying agent. Activated alumina water filters act uniquely because instead of filtering out contaminants, this filter absorbs them.
With this filter being made by a highly absorptive porous aluminum oxide (Al2O3), the same substance found in sapphire and ruby, it’s specially designed to get rid of arsenic, fluoride, and other contaminants from your drinking water. For fluoride specifically, see our fluoride water filter guide.
So, how does it work? The tap water needs to flow first through an initialization process, which involves the back-washing and chemical treatment from the activated alumina granules.
Fluoride, arsenic, and other contaminants are then absorbed by the activated alumina. The longer the contact between the activated alumina and water, the larger the amount of fluoride being absorbed.
But not all contaminants absorbed by an activated alumina water filter, it will be more effective if combined with another filter. That said, it’s also kind of pricey.
Another thing to think about is its possibility of leaching aluminum in your water, which may be caused by a poorly set up filtration or low consideration for its pH level. Again, like most water filters, proper cleaning is a must.
With activated alumina water filters, a regenerating agent is advisable for cleaning.
Common Setup for Home Water Purification System
Want to know what is best for your home? Different setups for water purification are commonly used around the world.
But it’s always best to know what type of water filter and the joint water system that your house needs.
Knowing how each type of filter works, you can now carefully choose which to combine. On top of that, it’s best to know the possible contaminants your water may get from your area.
The following are the suggested setups you can use for your house or a specific area:
Basic
Water Pitcher is composed of only one filter, so it’s either the usual activated carbon filter or a mix with a sediment filter. This is the simplest setup that provides the clean water you need.
There’s no installation needed for you to use it after buying. It’s also a convenient water filter because you can carry it around the house or even outdoors.
Faucet Water Filter is well-made especially for the family that needs just the basic water filtration and steady water supply. This is also known as a point of use water filter. As its name, a faucet water filter is a convenient device that you attach to the faucet.
Single-stage Countertop Water Filter is suitable for people who don’t want to change the filter but need clean water. You can use a countertop water filter for a very long time.
Single-stage Under Sink Water Filter is a type of filter that most people prefer. The Kube water filter is a popular under-sink option. The reason behind this is that you can hide this filter under your sink, making your place more pleasing.
Advanced
Multi-stage Countertop Water Filtration System is what you want for more advanced water filtration. By linking 2 or more water filters, you can make sure that your water is better filtered.
One type of water filter can’t remove all kinds of harmful organisms and contaminants, which is why multi-stage water filtration is suggested.
Multi-stage Under Sink Water Filtration System gives you an advanced water filter without ruining the aesthetic of your kitchen or home.
Gravity Drip Water Filter is composed of a multi-layer filtration system. Unlike most water filters that are mainly used inside our home, gravity drip water filters are used mostly for outdoor activities and for traveling.
A great choice for people that don’t have access to a kitchen or just renting a place.
Its process of water filtration is simple and easy. You just need to pour your water into its container area and wait for a while.
After this, you’ve filtered water that you can drink.
Benefits of Water Filter Cartridges
Our body needs water to work properly. But tap water isn’t healthy enough for us, and it can also cause disease and illness.
Some countries keep on using unfiltered water, and it brings life-threatening diseases to their communities.
The water filter development is a great convenience to us, especially in this generation. Clean and purified water is more accessible and portable because of these filters.
The main goal of water filters is to produce filtered water. Having safe water that you can surely drink is what we’re all thankful for.
With the use of different filters, almost all the contaminants, pollutants, harmful chemicals, and microorganisms are removed even before they enter our body system. For lead specifically, see our guide on the best water filters for lead.
Aside from clean water, water filters have a great contribution to protecting our environment. Even though we know that bottled water is safe, its container is mostly made of plastic that gets thrown away after use.
If we’ve a water filter installed in our house, we can just refill a reusable container.
Good Skin
Chlorine is a substance that most water filters remove. This harmful substance is responsible for making our skin dry and dull.
Some water filters don’t only remove harmful substances but also add minerals and increase the pH level that’s beneficial to our body. This gives us softer and younger-looking skin.
Water filters improve the taste and odor of the water. Most people won’t drink dirty or clouded water, and if it has a foul odor.
Bad taste and foul odor usually show that the water isn’t clean and has potential harm. With water filters, elements that can cause harm to our bodies are finally removed.
Surprisingly, water filters are helpful when a disaster happens near your area. If floods or busted sewer lines happen, chances of contamination in tap water are high.
However, if you’ve a water filter installed, your water is protected from possible contamination. Consider installing a whole house water filter for complete home protection.
Water filters are great to help in saving money. Yes, some filters may cost a lot, but it’s a one-time purchase.
Maintenance may be avoided through proper cleaning. Buying bottled waters is more expensive, especially if you add the delivery fee and tax.
Frequently Asked Questions
For most homes, activated carbon is the way to go — it's affordable, easy to install, and handles chlorine, VOCs, and off-tastes really well. If you want deeper purification, a multi-stage setup with sediment, carbon, and reverse osmosis will give you the cleanest water.
It depends on the type. Sediment and carbon filters usually need swapping every 3 to 6 months, while RO membranes can go 2 to 3 years. Ceramic filters are nice because you can clean and reuse them for a long time. Check your manufacturer's guidelines for the specific timing.
No, and that's actually the whole reason multi-stage systems exist. Each filter type targets specific impurities, so you need to combine them — like sediment plus carbon plus RO — to cover all your bases.
Sediment filters catch physical stuff — dirt, sand, rust, dust — but they can't touch chemicals or bacteria. Carbon filters work the other way around, using adsorption to pull out chlorine, VOCs, and bad tastes, but they're not great at catching larger particles. That's why they work so well together.
Final Thoughts
The bottom line is that no single filter can do it all. Each cartridge type has its strengths and blind spots, which is exactly why combining them works so much better than relying on just one.
Some are cheap and dead simple to install (like activated carbon), while others require more upfront investment and maintenance (like RO or UV). The trick is figuring out what's actually in your water and picking the right combination from there.
If you take anything away from this, let it be this: understand what each filter does, test your water if you can, and build a setup that covers the contaminants you're most concerned about.
