Best Under-Sink Water Filter for Chloramine (City Water)

Short answer: for city water treated with chloramine, the under-sink filter we can actually cite is the Aquasana Claryum AQ-6200. Its performance data sheet lists 91% chloramine reduction under NSF/ANSI 42. WQA certifies the system to NSF/ANSI 42, 53 and 401 for the claims on that sheet. It is a two-stage carbon filter on its own faucet, not reverse osmosis.

Published October 6, 2026. Specs are from Aquasana's AQ-6200 performance data sheet and product page, and from EPA's chloramines page, read that day. The Amazon listing (brushed nickel, AQ-6200-BN) was in stock. We have not tested this unit, and we don't run a lab.

What chloramine is

EPA describes chloramines as disinfectants used to treat drinking water. They are most commonly formed when ammonia is added to chlorine. EPA says they last longer in the pipes than chlorine alone, that utilities have used them since the 1930s, and that more than one in five Americans drinks water treated with chloramines. Water that meets EPA standards is, in EPA's words, safe for drinking, cooking, bathing and other household uses. Source: Chloramines in Drinking Water, read October 6, 2026.

People still shop for a chloramine filter because the residual can affect taste and smell, and because a filter sold for "chlorine" may not list chloramine at all. Your utility's consumer confidence report is the document that says whether you have chlorine, chloramine, or both. See how to read a water quality report.

Why the data sheet has to say chloramine

NSF/ANSI 42 covers aesthetic claims, including chlorine and chloramine reduction. NSF/ANSI 53 covers health-related claims such as lead and PFOA/PFOS. A sticker that only says "NSF certified" does not tell you which standard, or which substance, was tested.

Carbon can reduce chlorine. Chloramine is harder for ordinary carbon, which is why catalytic carbon shows up on filters that publish a chloramine number. If the sheet does not list chloramine, do not assume the chlorine line covers it.

The under-sink pick: Aquasana AQ-6200

Aquasana's Claryum 2-Stage is a point-of-use filter that connects to the cold line and uses its own faucet. The performance data sheet for model AQ-6200 says the system was tested to NSF/ANSI 42, 53 and 401, and that WQA certified it for the claims on that sheet.

Chloramine is in the NSF/ANSI 42 section, not the health-effects section:

• Chloramine reduction: 91% (listed as free available chloramine)
• Chlorine reduction: 97.3%
• Particulate Class I: 99.6%

Health-related lines on the same sheet include lead (greater than 99.7% at pH 6.5, and 99.6% at pH 8.5), PFOA and PFOS together at 99.7%, cysts, mercury, and a VOC surrogate test. Microplastics are listed under NSF/ANSI 401 at 99.6%. The sheet says testing was done in a lab and that real performance may vary. It also says the filter does not remove every contaminant that might be in tap water.

Aquasana's product page describes the cartridges as activated carbon plus catalytic carbon, with ion exchange and a sub-micron stage. Rated figures from the data sheet and the product page:

• Capacity: 500 gallons (Aquasana also says up to 6 months, and suggests changing cartridges every 3 to 6 months)
• Flow: 0.5 gpm
• Pressure: 20–80 psi
• Temperature: 40–90°F, cold water only
• Size: about 4.25 × 8.25 × 9 inches
• Replacement: AQ-C2-R
• Faucet hole: Aquasana says the included faucet needs a 1/2-inch hole. A renter who already has a sprayer or soap-dispenser hole can use that, then put the original part back when they move. If there is no spare hole, this is the wrong install.

What this filter does not do

Fluoride, nitrate and arsenic do not appear on the AQ-6200 performance data sheet we read. Aquasana says the filter is not reverse osmosis and that it leaves minerals such as calcium and magnesium in the water. A TDS meter will not drop the way it does with RO, and that is expected.

It treats one faucet, not the shower or the washing machine. Chloramine at every tap is a whole-house question. Our city-water whole-house guide is the page for that. SpringWell markets its CF1 tank for chloramine on city water; that is a different product, sold direct, and it is not an under-sink filter.

A reverse osmosis system is the tool when you also want dissolved solids or fluoride reduced. The Waterdrop G3P800 and the iSpring RCC7 are compared here: G3P800 vs RCC7. Neither maker's page that we read lists a chloramine certification for those RO units, so this page does not call them chloramine filters. Use them for the claims they actually publish.

How to choose

Buy the AQ-6200 if your report shows chloramine (or you want the lead and PFOA/PFOS lines on the same sheet), you can add a small faucet, and you want to keep minerals.

Skip it if you need fluoride or a large TDS drop, you have no faucet hole and cannot add one, or you want every tap treated. No-drill options are a different problem: renter-friendly filters.

For the wider under-sink field, including tankless RO, see best under-sink water filters (2026).

Frequently asked questions

What is the best under-sink water filter for chloramine?

Of the under-sink filters we can link, the Aquasana Claryum AQ-6200 is the one whose performance data sheet lists chloramine. The sheet reports 91% chloramine reduction under NSF/ANSI 42. WQA certifies the system to NSF/ANSI 42, 53 and 401 for the claims on that sheet.

Does a chlorine filter also remove chloramine?

Not necessarily. Chloramine is chlorine combined with ammonia. A data sheet that only lists chlorine does not prove chloramine reduction. Read the sheet for the word chloramine.

Does the AQ-6200 remove fluoride or lower TDS?

Fluoride, nitrate and arsenic are not on the AQ-6200 performance data sheet we read on October 6, 2026. It is a carbon filter, not reverse osmosis. Aquasana says it leaves minerals such as calcium and magnesium in the water.

Is chloramine in city water dangerous?

EPA says chloramines are disinfectants, and that water meeting EPA standards is safe for drinking, cooking and bathing. This page is about filters that publish a chloramine reduction. It is not medical advice.

Related guides

• Best under-sink water filters (2026)
• Waterdrop G3P800 vs iSpring RCC7
• Best water filters for PFAS
• How to remove chlorine from tap water