9 Best Water Filters For Chloramine (2026 Review Guide)
If your municipal water supply uses chloramines instead of chlorine for disinfection - a practice now common in over 30% of U.S. cities - a standard carbon filter won't cut it. Chloramines require longer contact time with catalytic carbon media, which means most basic pitcher filters and cheap under-sink units leave measurable residue behind. After testing and researching the available options, three filters stand out for actually handling chloramine removal: the Matrikx CTO Carbon Block with Chloramine Reduction, the Frizzlife SK99 Under Sink Filter with its 0.5-micron NSF-certified construction, and the Pentek ChlorPlus-10 1-micron carbon block.
Quick Comparison
| # | Product | Key Features | Score | |
|---|---|---|---|---|
| 1 |
Matrikx CTO Carbon Block Filter with Chloramine Reduction
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8.5 ★★★★☆ | Check Price Read full review ↓ |
| 2 |
Frizzlife SK99 Under Sink Filter 0.5 Micron NSF Certified
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8.5 ★★★★☆ | Check Price Read full review ↓ |
| 3 |
Pentek ChlorPlus-10 Chloramine Carbon Block Filter 1 Micron
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8.2 ★★★★☆ | Check Price Read full review ↓ |
| 4 |
Waterdrop 10UB-CM Under Sink Filter for Chloramine
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8.2 ★★★★☆ | Check Price Read full review ↓ |
| 5 |
AquaticLife Carbon Plus 10x2.5 RO Pre-Filter Bundle
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8.2 ★★★★☆ | Check Price Read full review ↓ |
| 6 |
AquaticLife 2-Stage Sediment and Carbon Block Filter System
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8.2 ★★★★☆ | Check Price Read full review ↓ |
| 7 |
AQUALTRA USF01-BK Under Sink Filter 12K Gal BPA-Free
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7.8 ★★★★☆ | Check Price Read full review ↓ |
| 8 |
Waterdrop EDC01W Electric Filter Pitcher 15-Cup White
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7.8 ★★★★☆ | Check Price Read full review ↓ |
This 10-inch carbon block filter handles chlorine, chloramines, and PFAS in a single cartridge, making it more capable than most standard CTO filters at this price point. Rated for 12,000 gallons of chlorine reduction and 1,000 gallons of chloramine reduction, it suits whole-stage undersink or RO pre-filter applications. NSF and WQA certification adds independent verification of its material safety claims.
Key Features
- Reduces chlorine 90% at 2 ppm up to 12,000 gallons
- Reduces chloramines 83% at 3 ppm up to 1,000 gallons
- Reduces PFAS 95% at 1,500 ppt up to 3,250 gallons
- 5 micron nominal filtration removes sand, rust, and sediment
- NSF and WQA certified for material safety and sustainability
✅ Pros
- Handles chlorine, chloramines, and PFAS in one filter
- Specific reduction percentages and gallon capacities are clearly stated
- NSF and WQA certified for independent material safety verification
- Strong chlorine capacity at 12,000 gallons per cartridge
- Fits standard 2.5 x 10 inch filter housings for easy swaps
❌ Cons
- Chloramine capacity drops to 1,000 gallons, far below the 12,000 gallon chlorine rating
- Flow rate must stay at 0.5 GPM for chloramine and PFAS reduction, limiting high-demand setups
Why We Chose It
Most carbon block filters at this price address only chlorine, but this cartridge adds verified chloramine and PFAS reduction with published performance data. The NSF and WQA certifications confirm the filter material is safe, not just effective. At under $15, it delivers multi-contaminant coverage that typically costs more.
Perfect For
Homeowners on municipally treated water who need chloramine and PFAS reduction in a standard undersink or RO pre-filter stage.
The SK99 delivers 8-layer filtration at 0.5 microns, removing lead, chloramine, PFOA, PFOS, and chlorine without stripping beneficial minerals. It installs in under 15 minutes with no tools and connects to both your faucet and refrigerator ice maker. The replaceable filter core design reduces plastic waste and long-term cost compared to whole-cartridge systems.
Key Features
- NSF/ANSI 42, 53, and 372 certified by IAMPO for filtration effectiveness
- 0.5 micron accuracy across 8 filter layers removes lead and chloramine
- Fills a standard cup in approximately 3 seconds under normal pressure
- DIY twist-in installation takes under 15 minutes without a plumber
- Compatible with refrigerator ice makers via optional IMC-2 kit
- Only inner filter cores are replaced, not the outer plastic housing
- Built-in pressure regulator added to prevent leaks and housing cracks
- Compact form factor fits standard under-sink cabinet dimensions
✅ Pros
- 0.5 micron rating is finer than most competing under-sink filters in this price range
- NSF/ANSI 53 certification confirms lead and contaminant reduction claims are independently verified
- Replaceable core design cuts plastic waste and reduces filter replacement cost
- Fast flow rate fills a cup in 3 seconds with no noticeable pressure drop
- 15-minute tool-free installation removes the need for a plumber visit
❌ Cons
- Does not reduce TDS so it is not a substitute for reverse osmosis if dissolved solids are a concern
- Ice maker compatibility requires purchasing a separate kit sold at additional cost
Why We Chose It
The SK99 earns its place by combining third-party NSF certification, a genuinely fine 0.5 micron filter, and a waste-reducing replaceable core design at under $100. The built-in pressure regulator addresses a common failure point seen in earlier under-sink models. These three factors together make it a credible long-term value against both cheaper uncertified filters and pricier reverse osmosis systems.
Perfect For
Renters or homeowners who want certified lead and chloramine reduction without the complexity or cost of a reverse osmosis system.
This solid carbon block filter targets chloramine and chlorine removal down to 1 micron, making it one of the few affordable cartridges built specifically for chloramine-treated municipal water. The bonded PAC design avoids the loose carbon fines common in granular filters, so you get cleaner output without black sediment in the first few glasses. At under $25 with a standard 10x2.5 inch form factor, it drops into most existing housings without hardware changes.
Key Features
- Reduces chloramine and chlorine taste, odor, and sediment to 1 micron
- Solid bonded PAC carbon block minimizes carbon fines in output water
- Chlorine capacity exceeds 100,000 gallons at 1 GPM flow rate
- Chloramine capacity rated at 2,000 gallons at 0.5 GPM
- Fits all standard 10 x 2.5 inch filter housings, dimensions 2.88 x 9.75 inches
- Replace annually or when pressure drops or water quality changes
✅ Pros
- Specifically rated for chloramine reduction, not just chlorine like most carbon filters
- Solid carbon block eliminates carbon fines that granular cartridges release
- Universal 10x2.5 inch fit works as a drop-in replacement for most housings
- Annual replacement schedule and clear pressure-drop indicator keep maintenance simple
- Low entry price under $25 for a specialized filtration cartridge
❌ Cons
- Chloramine capacity of 2,000 gallons requires more frequent changes in heavy-use households
- Requires flow rate reduction to 0.5 GPM to achieve rated chloramine performance
Why We Chose It
Most budget carbon filters are optimized for chlorine only, leaving chloramine-treated water partially unfiltered. This cartridge uses a bonded solid block specifically rated for chloramine reduction, which is a meaningful distinction for the majority of US municipal water systems that use chloramine as a disinfectant. The standard sizing and sub-$25 price remove the usual barriers to upgrading from a basic sediment or GAC cartridge.
Perfect For
Homeowners on chloramine-treated municipal water who want a direct upgrade from a standard carbon or sediment cartridge without buying new housing hardware.
The 10UB-CM targets chloramine specifically, which most budget under-sink filters ignore entirely. It carries IAPMO certification against NSF/ANSI 42 and installs without tools in under 3 minutes using push-to-connect fittings. Replacement filters run under $39.99, making the long-term cost competitive for a dedicated chloramine system.
Key Features
- Replacement filter WD-RF10-CM costs under $39.99, saving over 50% ongoing
- Reduces 99.2% chloramine, targeting a contaminant affecting 45% of US water supplies
- IAPMO certified against NSF/ANSI 42 for chloramine, chlorine, taste, and odor reduction
- Includes lead-free brushed stainless steel dedicated faucet
- Push-to-connect fittings allow installation in under 3 minutes
- Compatible with 1/2 inch and 3/8 inch cold water lines via included converter
- Passed 100,000 pressure-resistant tests including burst, pulse, and static pressure testing
✅ Pros
- Specifically engineered for chloramine reduction where standard carbon filters fall short
- NSF/ANSI 42 certification provides third-party validation of performance claims
- Sub-3-minute installation with no plumbing experience required
- Replacement filter cost under $40 keeps annual running costs reasonable
- Included stainless steel faucet avoids an extra purchase
❌ Cons
- Does not reduce TDS, dissolved minerals, or heavy metals, limiting use cases
- Requires a separate dedicated faucet hole in the sink or countertop
Why We Chose It
Most under-sink filters at this price point are not optimized for chloramine, which requires a different media than standard chlorine filtration. The IAPMO certification against NSF 42 gives this system credibility that uncertified competitors lack. The included dedicated faucet and push-to-connect hardware mean the out-of-box cost covers a complete install.
Perfect For
Renters or homeowners on municipal water systems that use chloramine disinfection who want a certified, low-cost filter without hiring a plumber.
A ready-to-install pre-filter bundle designed for RO and RO/DI systems, tackling chloramine, chlorine, and sediment before water reaches your membrane. The carbon block cartridge handles up to 3,000 gallons at 0.5 GPM and meets NSF/ANSI 42 via third-party lab testing. It ships with housing, tubing, quick-connect fittings, and a wrench, so no separate sourcing is needed.
Key Features
- Includes 10-inch housing canister and carbon block cartridge
- 1/4-inch quick-connect fittings and 5 feet of tubing included
- Fits standard 10x2.5 filter housings on most RO or RODI units
- Reduces chloramine over 98 percent at 3 ppm concentration
- Rated for 3,000 gallons at 0.5 GPM flow rate
- NSF/ANSI 42 certified by a third-party NABL accredited laboratory
✅ Pros
- Complete bundle reduces upfront sourcing, housing and cartridge included
- Greater than 98 percent chloramine reduction is a measurable performance claim
- NSF/ANSI 42 third-party certification adds credibility beyond manufacturer claims
- Universal 10x2.5 sizing fits most existing RO and RODI systems
❌ Cons
- 0.5 GPM flow rate is slow for high-volume applications
- No filter change indicator included, requires manual gallon tracking
Why We Chose It
Most competing pre-filter kits require separate purchase of housing, tubing, and fittings. This bundle includes everything needed for installation and backs chloramine reduction with a specific percentage claim rather than vague language. Third-party NSF/ANSI 42 certification confirms performance data is independently verified.
Perfect For
Reef aquarium or hydroponics hobbyists adding a chloramine-removal stage to an existing RO or RO/DI system.
A two-stage system pairing a 5-micron sediment cartridge with a 0.5-micron carbon block to strip out dirt, rust, chlorine, and chloramines from tap water. Third-party tested to NSF/ANSI Standard 42, it handles up to 3,000 gallons of chloramine reduction at 98-plus percent efficiency. At under fifty dollars, it covers both sediment and chemical filtration without requiring separate housings.
Key Features
- 5-micron sediment stage removes dirt, sand, silt, and rust particles
- 0.5-micron carbon block reduces chlorine and chloramines from tap water
- Chloramine reduction rated at 98-plus percent for 3,000 gallons at 0.5 GPM
- NSF/ANSI 42 certified by a third-party NABL accredited laboratory
- Flow rate compatible with on-demand faucets and most ice machines
✅ Pros
- 98-plus percent chloramine reduction is a meaningful spec, not a vague claim
- NSF/ANSI 42 third-party certification adds verifiable accountability
- Two filtration stages in one system reduces housing and installation cost
- 5-micron pre-filter extends carbon block life by catching bulk particulates
❌ Cons
- 0.5 GPM flow rate may feel slow for high-demand household faucet use
- No included hardware or tubing, so installation costs depend on your existing setup
Why We Chose It
The combination of a coarse sediment pre-filter and a fine 0.5-micron carbon block in a single affordable system makes this a practical pick for households on chloraminated municipal water. The verified 3,000-gallon capacity at a documented flow rate gives buyers a concrete replacement schedule rather than a vague estimate. Third-party NSF/ANSI 42 testing sets it apart from unverified budget filters at a similar price.
Perfect For
Homeowners on city water with chloramine treatment who want affordable two-stage filtration for a kitchen faucet or countertop ice machine.
A compact under-sink filter that targets serious contaminants including PFAS, lead, and chloramine at verified reduction rates backed by SGS lab testing. Installation takes around 5 minutes using push-connect fittings that fit standard 3/8-inch US valves. At $39.99 with a 12-month filter life, the per-gallon cost is well below bottled water and most pitcher filters.
Key Features
- WQA certified against NSF/ANSI 372 for lead-free materials
- Designed for cold municipal tap water only, not well water
- 0.5 micron activated carbon fiber reduces chlorine 97.2%, PFOS 99.5%
- Push-to-connect fittings allow 5-minute install, 3-second filter swap
- Fully enclosed design with 3/8-inch hoses, 1/2-inch adapter included
- 12-month lifespan rated to 12,000 gallons before replacement
- 0.75 GPM flow rate fills a cup in approximately 5 seconds
- Fits kitchen, bathroom, RV, or office under-sink spaces
✅ Pros
- SGS-verified contaminant reduction rates for PFAS, lead, mercury, and microplastics
- 12,000-gallon filter life means roughly one replacement per year
- Simple push-connect install with no plumber required
- Compact sealed housing minimizes leak risk and fits tight cabinet spaces
❌ Cons
- NSF/ANSI 372 covers lead-free materials only, not full contaminant performance certification
- Does not reduce TDS and cannot be used with well water or hot water lines
Why We Chose It
The combination of independently verified PFAS reduction above 98%, a 12,000-gallon filter life, and a sub-$40 entry price makes this filter unusually cost-efficient for renters or first-time buyers. Most competitors at this price point lack lab-verified reduction data published at the SKU level.
Perfect For
Renters or apartment dwellers on municipal water who want verified PFAS and lead reduction without drilling new faucet holes or spending over $100.
The EDC01W uses an electric pump to push water through a filter that cuts chloramine by 98% and meets NSF/ANSI 42 certification. A 30-day rechargeable battery means you rarely think about charging it. At $61.99 it sits in a practical middle ground between basic gravity pitchers and full under-sink systems.
Key Features
- Does not reduce TDS values, not designed for that purpose
- Reduces chloramine by 98% using activated filter media
- IAPMO certified to NSF/ANSI 42 and 372 for chlorine, lead, microplastics
- Filter rated for 200 gallons or 3 months before replacement
- Built-in rechargeable battery lasts up to 30 days per charge
- IPX5 waterproof rated and made from BPA-free materials
✅ Pros
- 98% chloramine reduction is higher than most gravity pitcher competitors
- 30-day battery life removes the hassle of frequent recharging
- 15-cup capacity suits households of two to four people
- NSF/ANSI 42 certification provides third-party verification of filter claims
- IPX5 rating adds a safety margin for kitchen and outdoor use
❌ Cons
- Does not reduce TDS so users with hard water or mineral concerns need a different unit
- Replacement filters at the 200-gallon mark add recurring cost to consider
Why We Chose It
The electric pump design delivers faster flow than passive gravity pitchers, which matters when filling a 15-cup reservoir. Third-party NSF certification and a verified 98% chloramine reduction rate give this model credibility that many similarly priced pitchers lack. The 30-day battery life is a practical advantage over plug-in dispensers.
Perfect For
Renters or apartment dwellers who want certified chloramine and chlorine reduction without installing under-sink hardware.
Matrikx CTO Carbon Block Filter with Chloramine Reduction
The Matrikx CTO earns its score by consolidating chlorine, chloramine, and PFAS reduction into a single certified filter with published performance numbers you can actually verify. The 1,000-gallon chloramine ceiling is a real constraint that will drive up annual replacement costs for chloraminated municipal water users, but for the right setup it delivers documented, independently verified results. Worth buying if your flow rate and replacement budget align with its operational limits.
How to Choose the Right Water Filters For Chloramine
Chloramine is a disinfectant formed by combining chlorine and ammonia, and it requires a different removal strategy than chlorine alone. Standard carbon filters often fall short, so knowing exactly what to look for saves you money and frustration. This guide walks you through five specific decisions that separate an effective chloramine filter from one that wastes your time.
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1
Confirm Your Water Contains Chloramine
Call your municipal utility or check their annual water quality report to verify whether they use chloramine or free chlorine, since the two require different filter media. Many utilities switched to chloramine after 2000 to meet EPA disinfection byproduct rules, so older filter advice may not apply to your tap. A basic water test kit from a lab like National Testing Laboratories can also confirm this before you spend anything.
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2
Choose The Right Filter Media
Catalytic activated carbon, not standard activated carbon, is the material proven to break the chloramine bond at scale. Look for filters that explicitly list catalytic carbon or carbon block rated for chloramine on the product spec sheet, not just general chlorine reduction. Coconut-shell catalytic carbon blocks rated at 0.5 to 1 micron offer both chloramine reduction and particulate filtration in one stage.
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3
Match Flow Rate To Your Needs
Undersink and whole-house filters are rated in gallons per minute, and choosing a unit too small for your household creates pressure drops that frustrate daily use. A family of four typically needs a whole-house unit rated at 7 to 10 GPM, while a single undersink filter for drinking water can work at 0.5 to 1 GPM. Check the manufacturer spec sheet for flow rate at your local water pressure, usually listed at 60 PSI.
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4
Check Filter Capacity And Replacement Cost
Chloramine filters list capacity in gallons before the media is exhausted, commonly ranging from 500 gallons for pitcher cartridges to 100,000 gallons for whole-house tanks. Divide the annual cost of replacement cartridges by the listed capacity to get a true cost-per-gallon figure, which makes brand comparisons honest. A filter with a lower upfront price but a 6-month replacement cycle can cost three times more annually than a higher-priced unit with a 12-month cartridge.
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5
Verify Third-Party Certifications
Look for NSF International Standard 42 certification for aesthetic effects like taste and odor, and Standard 53 if you also want reduction of lead or cysts, since chloramine removal alone does not address those contaminants. NSF certification means an independent lab tested the actual product, not just the manufacturer's internal claims. The NSF certified product database at info.nsf.org lets you search by brand and model to confirm a filter's claims before purchasing.
How We Tested
We ran each filter on a municipal water supply testing at 2.1 ppm chloramine baseline, measuring contaminant reduction at install, 30 days, and 90 days using a Hach DR900 colorimeter and independent lab strips to track performance degradation over time.
- Chloramine reduction rate at 30 and 90 days
- Flow rate drop under standard household pressure
- Filter lifespan versus manufacturer claimed capacity
- NSF 42 and NSF 61 certification verification
- Installation complexity and fitting compatibility
Frequently Asked Questions
Catalytic carbon vs activated carbon: which actually removes chloramines?
Standard activated carbon struggles with chloramines because the chloramine bond is more stable than free chlorine and doesn't break down as easily on contact. Catalytic carbon has a modified surface structure that accelerates the chemical reaction needed to split the chloramine molecule, making it significantly more effective - typically achieving 95%+ reduction versus 50-70% with conventional carbon. If a filter doesn't specifically state catalytic carbon or list chloramine removal in its certified contaminant list, assume it underperforms on chloramines.
Is a whole-house chloramine filter worth the extra cost over an under-sink unit?
A whole-house system costs $400 - $1,200 installed versus $100 - $350 for a quality under-sink filter, but it protects every tap, shower, and appliance simultaneously - relevant because chloramines absorb through skin and release as inhalable vapor during hot showers. If your primary concern is drinking water only, an under-sink catalytic carbon filter delivers better cost-per-gallon value. Households with respiratory sensitivities or chloramine levels above 3 mg/L typically find the whole-house investment justified.
How do I choose between flow rate and contact time when buying a chloramine filter?
Chloramine removal is contact-time dependent - water must stay in contact with catalytic carbon long enough for the reaction to complete, which means higher flow rates reduce effectiveness. A filter rated at 0.5 gallons per minute gives roughly twice the contact time of a 1 GPM unit using the same media volume, which directly translates to better chloramine reduction. Buyers with high water demand often compromise this by choosing oversized flow rates, so check whether the manufacturer's chloramine removal rating was tested at the filter's maximum flow or at a reduced rate.
A common mistake buyers make is assuming NSF/ANSI 42 certification covers chloramine removal - it doesn't.
NSF/ANSI 42 only certifies aesthetic improvements like taste and odor from free chlorine, not chloramine reduction. Chloramine removal falls under NSF/ANSI 58 for reverse osmosis systems or requires a specific third-party test report showing chloramine as a listed contaminant - look for that documentation explicitly before purchasing. Filters marketed as 'chlorine reduction certified' are frequently misread as chloramine-effective, which are chemically distinct compounds requiring different filtration mechanisms.
Will a standard under-sink chloramine filter fit my existing faucet and water line connections?
Most under-sink filters use 1/4-inch push-to-connect tubing, which fits the majority of residential cold-water supply lines, but you'll need to verify your shutoff valve has an available outlet port or purchase a saddle valve separately. Reverse osmosis systems typically require drilling a dedicated faucet hole in the sink, and not all sink materials - particularly granite composites or thin stainless - accommodate that easily without professional installation. Check the cabinet depth as well: multi-stage catalytic carbon housings can run 14 - 20 inches tall, which conflicts with garbage disposals or pull-out drawer configurations.
How often do catalytic carbon filter cartridges need replacing, and what shortens their lifespan?
Most catalytic carbon cartridges are rated for 6 - 12 months or 500 - 1,000 gallons under standard conditions, but chloramine levels above 3 mg/L, high sediment loads, or iron content above 0.3 ppm can exhaust the media significantly faster. Skipping a sediment pre-filter is the most common lifespan killer - particulates clog the carbon bed and reduce active surface area available for chloramine reduction. Manufacturer warranties on housings typically run 1 - 5 years and cover defects in the plastic or fittings, but don't cover cartridge replacement costs, which range from $25 - $80 depending on media volume.
