Which Water Filter Brands Handle New York City's Tap Water Best?

New York City tap water presents three different filter questions: low-level PFAS in Croton-supplied neighborhoods, lead in buildings plumbed before 1987, and chlorine taste citywide. Viomi M1 is the best-documented option in this guide for low-level PFAS in Croton-supplied neighborhoods, with SGS lab testing showing PFOS reduction above 99.67% and lead reduction above 99.87%. Buildings plumbed before 1987 have a more direct lead answer in Viomi Under-Sink Water Filtration System (VM-IUO1PCW-US), tested to NSF/ANSI 53 for lead at a price below most comparable under-sink systems. The chlorine taste that touches nearly every address citywide is a simpler case: a basic NSF/ANSI 42-certified pitcher from Brita or PUR is enough on its own.

What's Actually in New York City's Tap Water

New York City's drinking water starts out unusually clean by U.S. standards. About 90% of it comes from the Catskill and Delaware watersheds upstate, more than 100 miles from the city, and travels to the tap without ever passing through a conventional filtration plant. The EPA allows this under a Filtration Avoidance Determination, a waiver granted because the city's watershed protection program keeps the source water clean enough that full filtration isn't required.

The remaining share comes through the smaller Croton system, which has run through its own filtration plant since 2015. New York City's 2023, 2024, and 2025 annual drinking water quality reports each state that the system met or exceeded applicable federal and state standards, with no MCL violations listed in any of those three years.

The city's most recent violation on record was a February 2022 notice for haloacetic acids (HAA5) exceeding its running annual average limit at one monitoring point. DEP resolved it, and it hasn't recurred in the reports since.

That compliance record doesn't mean there's nothing worth filtering for. Three issues consistently come up in NYC-specific water discussions, though none of them point to a uniform problem with the source reservoirs themselves.

Chlorination Byproducts (HAA5 and TTHM)

The city disinfects its water with chlorine. Chlorine reacting with natural organic matter in the reservoirs creates two tracked byproduct groups: haloacetic acids (HAA5) and total trihalomethanes (TTHM).

DEP's 2025 drinking water quality report puts the highest reported locational running annual average for HAA5 at 47 µg/L, about 78% of the 60 µg/L legal limit. For TTHM, the comparable figure is 52 µg/L, about 65% of the 80 µg/L limit. Both are within the law, but they represent the worst-case monitoring points citywide rather than a system-wide average.

These byproducts share a cause with the taste and odor complaints many NYC residents report, especially in warmer months. All of it traces back to the free chlorine residual DEP uses for disinfection. That's what people actually smell and taste, and it's also what drives HAA5/TTHM formation as it reacts with organic matter in the reservoirs.

This is a chlorine-taste issue more than a health-crisis issue. A carbon filter can address the chlorine taste itself. Reducing HAA5 and TTHM specifically requires a product with its own tested or certified performance claim for those byproducts, since a standard NSF/ANSI 42 taste-and-odor certification doesn't automatically cover them.

Lead From Private Plumbing, Not the City's Mains

DEP's water mains and aqueducts deliver lead-free water. The risk sits downstream, in private service lines and interior plumbing. Lead water service lines were legal in the city until 1961. Lead solder used on household pipes remained legal longer, until 1987, according to DEP's own guidance.

That means buildings plumbed anytime before 1987, not just those built before 1961, can still have a lead source somewhere between the curb and the faucet.

An analysis by the local newsroom THE CITY of a decade of DEP's voluntary tap-water test kit results found that more than a third of the kits residents submitted came back with some detectable lead. That's a self-selected group of people who asked for a test, not a random sample of the city's housing, so it shouldn't be read as the citywide rate.

Separately, NYC's own 2025 regulatory compliance sampling under the federal Lead and Copper Rule found 16 of 326 samples above the 15 parts-per-billion action level. That's a rate under the 10% threshold that would trigger mandatory system-wide action, but it's still a real number of individual results above the line.

If your building predates 1987, lead is the contaminant worth filtering for specifically, regardless of what the citywide averages say. For that age range, a filter tested or certified to NSF/ANSI 53 for lead is the direct answer. Viomi Under-Sink Water Filtration System (VM-IUO1PCW-US), covered in detail below, is built specifically for that combination of lead and chlorine taste, at a lower price than most under-sink options in this guide.

Low-Level PFAS, Concentrated in Croton-Supplied Areas

PFAS ("forever chemicals") have been detected in NYC's water supply through EPA's fifth Unregulated Contaminant Monitoring Rule (UCMR 5, sampling conducted 2023-2025) and DEP's own testing. The pattern is uneven. The primary Catskill/Delaware supply has generally shown non-detectable PFAS at DEP's key monitoring points, while the smaller Croton system has recorded detections in some samples, generally at low levels.

EPA's 2024 national rule set individual maximum contaminant levels of 4.0 parts per trillion for both PFOA and PFOS. As of mid-2026, EPA has proposed extending the compliance deadline for that rule from 2029 to 2031 for systems that qualify, so check EPA's current rulemaking status before assuming a fixed date.

Whether PFAS is a real concern at your specific address comes down to which system feeds your building, Croton or Catskill/Delaware, and that's a fact worth confirming directly rather than assuming from a citywide average.

Where Croton service does bring PFAS into the picture, reverse osmosis is the filtration category built to handle it. Viomi M1 and Viomi V8 PRO, covered in detail below, are the two RO systems this guide compares most closely on that basis.

If you rely on a private well outside the five boroughs, this NYC municipal-water guidance doesn't transfer directly. See the dedicated private-well section near the end of this guide for what to check instead.

Matching the Filter Technology to the Problem

A single NSF/ANSI standard number doesn't guarantee a specific contaminant is covered. NSF/ANSI 53, for example, spans a wide range of possible health-effect claims, and a given product can be certified under it for something other than lead. Always check the exact contaminant list attached to the certification, not just the standard number on the box.

Brands for Chlorine Taste and Odor: The Low-Cost Starting Point

Because chlorine taste touches the entire city, this is the one category where almost any reasonably priced filter clears the bar. Addressing HAA5/TTHM levels specifically, rather than chlorine taste alone, requires a product-specific performance claim, as explained above.

Brita's standard pitcher filter is NSF/ANSI 42 certified for chlorine, taste, and odor. It's the most widely available option in the city, sold at nearly every drugstore. PUR's base pitchers and faucet-mount filters carry the same NSF/ANSI 42 certification.

The base Brita pitcher filter and PUR's base pitcher filter aren't certified for lead, which matters if you're in an older building and want more than a taste fix. PUR's faucet mount filters are a different story, covered in the lead section below.

Brands With NSF/ANSI 53 Certification for Lead

If your building predates 1987, when lead solder in household plumbing was still legal citywide, this is the category to prioritize over a plain carbon filter, regardless of your budget.

Viomi Under-Sink Water Filtration System (VM-IUO1PCW-US) is a 0.5-micron carbon system tested to the NSF/ANSI 42 standard for chlorine, taste, and odor, the NSF/ANSI 53 standard for lead reduction, and NSF/ANSI 372 for lead-free material compliance.

It connects directly to your existing cold water line with push-to-connect fittings in under three minutes. It needs no drain tap since it isn't reverse osmosis, and it runs a replacement cartridge rated for 12 months or 8,000 gallons on municipal water, all at around $67 before any promotion.

For addresses where lead and chlorine taste are the concern rather than PFAS, that combination of tested performance, fast installation, and price well below Aquasana's $125-450 under-sink line makes it the most direct answer in this guide.

For comparison, three other brands offer lead-capable models worth considering:

• ZeroWater differentiates itself with a five-stage ion-exchange filter rather than a single carbon cartridge, IAPMO certification against NSF/ANSI 53 for PFOA/PFOS reduction (99.8%) and lead reduction (98.9% at pH 6.5 and 98.8% at pH 8.5), and a bundled TDS meter so you can watch total dissolved solids drop after filtering.
• Aquasana's Claryum line, sold as under-sink filters, currently runs roughly $125 to $200 on promotional pricing as of August 2026 (regular list price is $250 to $450 depending on how many stages you choose), and carries NSF/ANSI 42, 53, and 401 certification with reduction figures the company publishes for lead (around 99%), PFOA/PFOS (roughly 95-99.7% depending on the specific model), and chlorine/chloramine.
• PUR's base pitcher filter isn't certified for lead (the PUR PLUS pitcher filter is), but PUR's faucet mount filters, both the base and PLUS versions, carry lead-reduction certification.

Brands Built Around PFAS Reduction

This is where the evidence quality varies the most from brand to brand, and it's the category that matters most if your building is served by the Croton system.

ZeroWater and Aquasana, both covered above, back their PFAS claims with NSF/ANSI 53 certification and published percentages. Berkey takes a different evidentiary path. It's a popular gravity-fed countertop option for NYC apartments because it needs no plumbing connection at all.

The company cites its own third-party lab testing showing over 99% PFOA reduction. The other PFAS compounds on its results sheet, including PFOS and PFBS, are reported as surrogate estimates based on the PFOA challenge test rather than each compound being independently challenge-tested.

Black Berkey and Phoenix elements are not independently certified to NSF/ANSI 53 or 58 for PFAS the way ZeroWater and Aquasana are. That doesn't mean Berkey's numbers are wrong, but it is a genuinely different evidence tier. An accredited lab report commissioned by the manufacturer is not the same as a formal certification body verifying the exact model against a published standard.

Viomi M1 is the most PFAS-documented product in Viomi's own lineup. SGS laboratory testing on model MR10102-V10 (Viomi M1), taken at a test point after 14,600 liters processed, found reductions of more than 99.67% for PFOS, more than 99.42% for PFOA, and more than 99.87% for lead.

Because this is a model-specific test result rather than a general marketing claim, it carries more weight than most RO brands publish. More broadly, EPA identifies reverse osmosis as the technology of choice for PFAS treatment because the membrane physically blocks most PFAS molecules rather than relying only on chemical adsorption. Actual reduction still depends on membrane condition and maintenance.

At $799.99, the Viomi M1 sits at the top of Viomi's lineup. The price also covers a touchscreen smart faucet that displays real-time TDS, tracks filter life, and adds back a measured blend of minerals after purification.

Viomi M1 product page separately lists NSF/ANSI 42, 58, and 372 certification. These are the brand's own stated certifications, and a search of NSF's public database under the Viomi name doesn't currently return a matching listing for them.

Viomi V8 PRO is a tankless under-sink RO system priced at $479.99, lower than the Viomi M1. Its product page lists a broader stack of NSF/ANSI standards, 42, 53, 58, and 372, covering chlorine/taste/odor, lead, TDS reduction, and lead-free materials in one system.

Viomi states the Viomi V8 PRO is tested to target PFOS and PFOA reduction alongside lead, chlorine, arsenic, and nitrate.

For someone who wants a lower-cost, tankless RO system with that wide a contaminant list and doesn't need a specific PFAS percentage attached to the model, the Viomi V8 PRO is the stronger fit. If a documented PFAS reduction number matters more than price, the Viomi M1's SGS-tested figures make it the better match.

As with the Viomi M1, the NSF/ANSI stack listed on the Viomi V8 PRO's product page reflects the brand's own stated certification rather than a listing this article could verify in NSF's public database.

Whichever RO system you choose, PFAS reduction performance depends on the RO membrane staying within its rated capacity, so following the system's filter-life indicator and replacing the membrane and pre-filter on schedule matters more with PFAS than it does with a taste-only carbon filter.

If You Want One System That Handles All Three Issues at Once

For someone dealing with an older building's lead risk, general chlorine taste, and uncertainty about which water system actually feeds their address, a single reverse osmosis system under the sink is the most efficient option. When the specific model carries the right performance claims, it can address chlorine taste, lead, and PFAS together, instead of stacking a pitcher, a faucet filter, and something else.

Beyond Viomi M1 and Viomi V8 PRO, a few other RO brands come up often in NYC comparisons:

• APEC RO-90 is a traditional tank-based RO system (not tankless), priced at $264.99, less than either Viomi M1 or Viomi V8 PRO. It takes up more cabinet space for its pressurized storage tank, and its product page doesn't publish the kind of documented PFAS reduction percentage that Viomi M1 does.
• iSpring's RCC7-BLK and RCC7-BN variants are NSF/ANSI 58 certified for a named list of contaminants: asbestos, barium, cadmium, chromium (trivalent), copper, fluoride, lead, selenium, and TDS. The base RCC7, RCC7AK, and RCC7AK-UV models carry a narrower NSF/ANSI 58 certification for TDS reduction only. iSpring's own marketing separately advertises PFAS reduction across the RCC7 line, but that claim sits outside any of these certified lists, so it's worth treating as a company claim rather than a certified one.
• Culligan sells its Aquasential under-sink line mainly through local dealers with quote-based, service-plan pricing rather than a fixed online price. WiFi-based app monitoring is specific to the Aquasential Smart RO model, not the standard Aquasential RO, and it's a feature Viomi's own Viomi M1 also includes through its Viomi app.
• AquaTru and RKIN sell countertop RO units that skip the plumbing connection entirely, which is worth considering if you rent and aren't ready to commit to a dedicated faucet hole. Viomi's apartment installation guide covers that tradeoff in more detail if a plumbed-in system isn't an option where you live.

Comparing the Brands

What About Private Wells and Areas Outside the Five Boroughs?

If you're on Long Island, in the Hudson Valley, or anywhere else in New York State that relies on a private well rather than a municipal system, the guidance above doesn't transfer directly. Well water quality varies enormously by aquifer and depth. The concerns often shift toward bacteria, nitrate, iron, manganese, and hardness rather than the chlorination byproducts and PFAS patterns described here for NYC's municipal supply.

Start with a current water test from a certified lab before choosing any filter. Reverse osmosis systems, including Viomi's lineup, are built for municipal or otherwise pretreated feed water and are not designed to connect directly to an untreated well without appropriate pretreatment first.

FAQ

Is New York City tap water safe to drink without a filter? By the numbers in the city's own water quality reporting, yes. NYC's 2023, 2024, and 2025 annual reports each show the system meeting or exceeding federal and state drinking water standards, with no MCL violations listed, following a February 2022 HAA5 notice of violation that DEP resolved.

A filter isn't a response to a compliance failure. It's a way to address chlorine taste, reduce exposure to lead that may be entering the water after it leaves the city's mains, and address low-level PFAS if your building is served by the Croton system.

Do I need to worry about lead if I live in a newer NYC building? Lead risk in NYC is tied to older construction, not to the city's water mains, which are lead-free. Lead water service lines were legal until 1961, and lead solder in household plumbing remained legal until 1987, so even some buildings built after 1961 can still have lead solder on copper pipes.

If your building was fully plumbed after 1987, lead from plumbing is a much smaller concern. Testing your own tap water is still the only way to know for certain.

Does all of New York City's water have PFAS in it? No. Monitoring under EPA's UCMR 5 program and DEP's own testing shows an uneven pattern: the larger Catskill/Delaware supply has generally shown non-detectable PFAS at key monitoring points, while the smaller Croton system has recorded detections in some samples, generally at low levels. Which system feeds your specific address matters more than a citywide average.

Is reverse osmosis overkill for NYC tap water? Reverse osmosis is overkill only if chlorine taste is your one and only concern, since a certified carbon pitcher or faucet filter already handles that on its own. It stops being overkill, and becomes the more thorough answer, the moment lead risk from pre-1987 plumbing or Croton-area PFAS enters the picture, or you'd rather cover all three issues with one system instead of stacking separate filters. The tradeoff is a higher price and an under-sink installation to plan for.

What's the difference between a filter that's "NSF certified" and one that's just "tested to" an NSF standard? An active NSF or IAPMO certification means an accredited body evaluated that exact model for the specific claims shown in the certifier's current listing, and lists it in a current certified-product database. "Tested to" or "tested with reference to" a standard means a lab ran the test method, but the result may not carry an active certification listing.

Both can be legitimate evidence, but they're different claims. Marketing copy doesn't always spell out which one applies.

The Bottom Line

Two address-specific details do most of the sorting for these three issues: the building's plumbing age, and whether it receives Croton or Catskill/Delaware water.

Anything plumbed before 1987, whether the service line itself predates 1961 or a renovation just left old solder on newer copper pipe, carries a real chance of lead entering the water after it leaves DEP's mains. That calls for a filter specifically certified or tested to NSF/ANSI 53 for lead. Viomi Under-Sink Water Filtration System (VM-IUO1PCW-US) is the most direct answer at a price well below Aquasana's under-sink line, with ZeroWater and Aquasana worth a look if a longer independent certification track record matters more to you than price.

Buildings plumbed after 1987 skip most of that lead risk, which shifts the priority to chlorine taste, something any NSF/ANSI 42 pitcher from Brita or PUR handles. Separately, and regardless of building age, addresses on the Croton system carry their own priority: the low-level PFAS that makes reverse osmosis worth the higher price. Viomi V8 PRO and Viomi M1 are the two systems this guide compares most closely on that basis: Viomi V8 PRO for a broader certification stack, Viomi M1 for a documented, SGS-tested PFAS reduction percentage alongside remineralization.

None of this shows up by looking at a building's facade. The two things worth doing before buying anything are checking your building's plumbing history with a landlord or co-op board, and confirming whether Croton or Catskill/Delaware water actually serves your address.