10 Best Carbon Block Water Filters — Compared and Ranked

A good carbon block water filter can make a real difference in your water quality. If you don’t have time to test every option yourself, this list should save you a lot of trial and error.

The trick is knowing what you actually need to filter out. A quick water test tells you exactly what’s in your supply, so you can pick the right system without guessing.

Here’s something worth knowing: carbon block filters reduce the risk of certain cancers — including rectal, colon, and bladder cancer — by removing chlorine and its byproducts like Trihalomethanes (THMs) from your drinking water.

Quick Comparison Chart

1. Express Water — Best Overall

This three-stage whole house water filter removes nearly all major contaminants. It employs an activated carbon block, KDF, and sediment filter to eliminate everything from iron, lead, and pesticides to VOCs, chromium, herbicides, viruses, chloramines, and insecticides.

This is a very simple installation. It’s clear on the first stage of the housing which makes it easier to check if the filter is working or if there’s a need for replacement.

It would help you extend the lifespan of appliances and plumbing by separating chemicals from drinking water and shower.

The activated carbon block filters are equipped with triple filtration keeping no pressure loss. Only contaminants are sent down the drain, so that no water loss.

The high flow design supplies up to 0.25 gallons per second.

Changing a filter takes simple twist-off housing and drop-and-go. Three accessible pressure release buttons for easy filter removal mounting are optional.

The clear first stage filter housing allows you to confirm when your filter needs replacing without dismantling the body. The freestanding stainless steel frame makes your installation and filter changes easier while adding a protective buffer.

It includes a pressure gauge for each filter for easy monitoring.

2. Aquasana Well Water — Best for Well Water

This system is different from others since it doesn’t use salt as a water conditioner. Even so, it does a great job of removing up to 97% of chlorine including mercury, lead, VOCs, herbicides, and pesticides. For more on how to clean a carbon water filter, see our detailed guide.

Be sure to the O-rings are in the proper position and filters are tightened to their caps for best results.

Testing your water for TDS doesn’t indicate water quality, as this system won’t reduce TDS. These water filters are equipped with a carbon block and KDF filter to clean the water and check that healthy water for your home.

The result is improved health and taste, increased lifespan of appliances, and prevention of salt marks which we all hate.

It comes with a long 10-year warranty than most manufacturers provide. This technique is designed exclusively for well water contamination.

These activated carbon block filters provide protection against bacteria, viruses, and other contaminants commonly found in private well water.

To make sure purification, this product features the added UV filtration and Simply Soft salt-free water descaler. As a result, you get healthy, clean, and great-tasting water from every tap in your home.

The filtered water is healthy and clean by the removal of contaminants up to 97% for 5 years or 500,000 gallons with the premium whole house filter.

3. APEX Countertop — Best Alkaline

This is a countertop style alkaline water filter. The granular activated carbon block filter removes chlorine, chloramines, bacteria, and heavy metals like benzene, radon, THM, solvents, and TCE from filtered water.

It uses alkaline beads for adding magnesium, potassium, and calcium to the water. Alkaline water can increase good minerals to reduce fatigue and keep your body healthy.

It comes with a 1-year manufacturer warranty and a 30-day satisfaction guarantee. The granular activated carbon filter is replaced roughly at every 750 gallons of drinking watermark which estimates to 6 months with normal usage.

This countertop filter is designed to sit right on the kitchen countertop next to the sink. The installation is simple and connects to many standard household kitchen faucets.

Simply remove the aerator screen from the faucet and screw on the collar of the APEX diverter valve. The necessary hardware is included for you to install without any external help.

Using a countertop alkaline water filter also helps in checking plastic pollution. Since the water at your home would be clean and healthy enough, you won’t require spending money buying plastic water bottles.

Buying bottled water for daily home consumption gets expensive and tedious. You don’t have to lug heavy water jugs or cases to your house to enjoy fresh clean drinking water.

4. AQUA TRU RO — Best Countertop RO

This countertop filter includes the dual function pre-filter for the AQUA TRU Countertop RO Water Purification System. It’s among the few carbon block reverse osmosis systems present today.

The four steps of purification include a reverse osmosis membrane, an activated carbon filter, a mechanical pre-filter, and a reverse osmosis pre-filter. Unlike regular pitcher or refrigerator filters, this system takes out virtually all toxic chemicals in your tap water.

The pre-filter is advised to be replaced every 6 months, the carbon filter once a year, and the RO membrane nearly every 2 years. The carbon block filter is capable of removing high contaminants like chromium, copper, fluoride, radium, and chlorine.

The four-stage water filtration includes adsorption of carbon block, mechanical pre-filter, reverse osmosis pre-filter, US-made reverse osmosis membrane, and activated carbon filter. Be sure to your drinking water is free from harmful contaminant found in unregulated drinking water such as disinfection by-products and prescription drug residue like anti-depressants, etc.

This countertop water filtration system is easy to install and use. This arrangement makes it easier to fill glasses conveniently.

It comes with a compact design and a digital display indicating the time to change the filters.

5. Perfect Water — Best Long-Term

This long-term option is great for homeowners requiring whole house water filtration. The filter is essentially replaced once a year or after every 95,000 gallons.

The filter comes with a 2-year part warranty and provides a flow rate of up to 20 gallons per minute.

The oversize filters improve the flow rate and reduce maintenance frequency. It’s great for chlorinated city water, though for chloramines, you should use the HMF2SmgCC model instead.

The installation process needs to be done by people with prior experience in installing the setup. The filter removes up to 95% of contaminants like chlorine and other chemicals along with sediment.

It’s connected to the main water supply line so that all of the water dispensers in your residence - faucets, toilets, showers, baths, kitchen, and laundry dispense treated water. It removes chlorine from the city water.

The filtration takes place in two stages. First, the multi-gradient depth sediment filter with 4 layers of purification is designed for purity from bacterial and chemical resistance.

Second, the radial flow granular activated coconut shell carbon filter removes chemicals and odor.

6. iSpring 2-Stage — Best Value

This carbon block filter is significantly efficient. The carbon block cartridges can withstand 50,000 gallons, equal to 6 months for a small family.

It operates on high-quality PP sediment and carbon block filters for removing up to 95% of chlorine, sediment, VOCs, pesticides, herbicides, and other harmful chemicals.

It comes pre-assembled onto the mounting bracket for easy DIY installation. Backed by a 30-day money-back guarantee and extended manufacturer warranty upon warranty registration at iSpring.

Unlike an RO system, this carbon block system won’t reduce total dissolved solids and instead keeps healthy minerals in your water. If you’re interested in a filter that removes TDS, consider this iSpring Reverse Osmosis (RO) such as the RCC7 series and/or tankless RO system RO500.

The 2-stage process consists of a premium 5-micron polypropylene sediment filter (FP15B) that captures dirt, sand, silt, dust, rust, and scale particles and extends the life span of the CTO carbon block filter.

Using high-quality coconut shell carbon and highly compact fabrication tech, the CTO carbon block filter (FC15B) eliminates cloudiness as well as bad tastes and odors. This process removes over 90% of chlorine and is highly effective on organic compounds like herbicides and industrial solvents.

7. APEC RO-90 — Best Premium

This supreme quality premium flagship product is efficient for enjoying an unlimited freshwater supply for cooking and drinking only. The premium-grade RO-90 has been tested and certified to the highest standard in the industry with the WQA gold seal, guaranteeing the cleanest water out there.

Simple and organized, the RO-90 is designed to make distinguishing and replacing filters easy and hassle-free. The rigid QC process removes even the smallest contaminants to check that 99% removal of toxic fluoride, arsenic, and chromium.

At the same time, it completely spares you the worry about water leaks, bursts, and noises.

APEC super capacity filters last for up to 12 months with lower maintenance and fewer filter changes. Modern-design lead-free chrome finish faucet makes your countertop look great with a leak-free experience.

The designing, engineering, and assembly are done in the USA.

This product is the most long-lasting in the industry guaranteeing the safety of the water you drink and in doing so promoting healthy living. The water filter is tested and certified by WQA to remove up to 99% of contaminants such as toxic fluorides, arsenic, nitrates, heavy metals, as well as chlorine, taste, odor, VOCs, and much more.

8. Watts Premier — Best Push-Button

If quality and convenience are what you’re looking for, then this is the product for you. This water treatment system consists of four separate stages and is easy to install.

Back-flow prevention valves are installed to prevent leakage.

Changing the carbon block filters in this product is as easy as pushing a button. In a literal sense, the carbon block filters come with an attached button to turn them off.

You don’t need to wait for the filter to depressurize. Removing the mess and difficulty associated with filter changes.

No need to shut off the water before changing the filters. There are check valves installed in each filter lid that will close the water flow when filter cartridge is removed.

The maximum operating pressure is 100 psi.

It consists of 4 stages of purification. First, the sediment pre-filter (105311) and then the carbon pre-filter (105351).

Next is the 50 GPD membrane (105331) and lastly, the carbon post-filter (105341) giving you the clear and clean drinking water you desire.

It includes a chrome monitored top mount air-gap faucet and 3-gallon storage tank. Its filters change at the push of a button.

It’s certified by WQA to NSF/ANSI 372 lead-free and certified to NSF/ANSI 58 reverse osmosis standards.

9. 3M Aqua-Pure — Best Compact

This water filtration system is a great choice for cleaner and clearer water. This under-sink filter is NSF listed for the reduction of chlorine taste and odor.

This compact product is connected to the primary kitchen or bath water faucet. To increase the lifespan of the system’s performance and efficiency, you must do scheduled maintenance and check the filter for replacements at regular intervals, at the rated capacity, or earlier when you can see a change in the flow from the faucet.

Filter life is dependent on use and incoming water quality. It’s ideal for drinking and cooking purposes only.

It’s suited for both universal systems for both chlorinated (municipal) and non-chlorinated (well water) systems.

Notable features include 2,000-gallon capacity, 1.75 GPM flow rate, 3/8-inch NPT connection fittings, 25-125 psi pressure range, and a 40-100 degrees F temperature range. The space-saving unit easily installs under the sink or in confined spaces.

Being able to provide clean and clean drinking water in your home is both healthy and reassuring that you’re protecting your family against many unseen bacteria and viruses. With a water filtration system, you’ve filtered water for the whole family at your dispense.

From whole home water filtration to drinking water systems, you can find help to find your filtration solution. It comes with a 10-year limited warranty.

10. AQUA CREST — Best Compatible

This filter uses premium coconut carbon block filters for the reduction of chlorine by 98%. It has been tested for reducing sediment particles, rust, heavy metals, odor, and taste.

The water filtration system is equipped to provide you with better tasting and healthy water.

The filters are constructed with food-grade plastic housing, meaning you don’t have to worry about contaminants leaching back into your treated water. It’s also preventive of bursting to make sure a safe and protected experience.

A steady flow rate is ensured to provide stable filtered water without any pressure drops. The filtration is efficient and provides healthy drinking water.

The filtration is efficient and provides healthy drinking water. The life span of the filter is high although it’s advised to change your filter every 6 months or 2,000 gallons.

The former and the latter depending on the quality of your water supply line.

The filter meets the requirements of European Regulation (EC) No. 1935/2004, German Food and Feed Acts LFGB Section 30 and 31, French DM/4B/COM/003, Italian Health Decree, BS EN 12915-1:2003, and European RESOLUTION RES AP (2004).

This water filtration system is compatible with 3M Filtrete 3US-AF01, 3US-AS01 systems, Aqua-Pure AP Easy C-CS-FF systems, Whirlpool WHCF-SRC, WHCF-SUFC, WHCF-SUF, and several other models. AQUA CREST is an independent brand and this filter isn’t an original product.

Please note that the compatible model numbers of the filtrate products are quite similar, so double-check the exact model number before purchase to make sure you get the right one.

Why Should One Consider a Carbon Block Filter?

There are a few aspects you should consider before selecting a carbon block water filter for your home. Take a look at the key benefits and considerations.

Farewell Contaminants

Carbon block filters are supremely porous. This means that like a sponge, carbon filters allow water to be absorbed and cleaned by merely passing through it.

These filters are capable of removing particles like asbestos, cysts, certain pesticides, trihalomethanes, and volatile organic compounds (VOCs). A benefit of carbon filters is that they require no chemicals.

They also don’t strip the water of its naturally occurring salts and minerals.

Easy Replacement

The replacement of these filters is easy. As long as you follow the product’s installation guide, you’ll be drinking clean water until a replacement is due.

Since there’s an abundant category to choose from among carbon block filters, you’ll never struggle to find a replacement filter.

Budget-Friendly

These filters are the cheapest filters on the market because of their naturally occurring material. This news isn’t only good for your water but your wallet.

Easy-Breezy

Carbon block filters are the easiest to maintain. There’s no maintenance involved.

About every three months, depending on your average water consumption, you’ll need to replace the filter.

Keeps Minerals

Not only does activated charcoal purify the water, but it also keeps the nutrients that already exist within it rather than stripping everything away. Plus, charcoal adds minerals such as calcium, magnesium, and iron. To learn more about the different types available, see our guide to water filter cartridge types.