RECENT PROJECTS ★★★★★
Lincoln Square, Manhattan Lead testing at 11 early-childhood fixtures, sampled before program hours. East 76th Street, Manhattan Upper East Side residential engagement including Legionella analysis alongside the standard potable panel. Sunset Park, Brooklyn Twenty-sample academy lead assessment across two events, each with electronic data deliverables. Ridgewood, Queens Ten point-of-use lead assessment, 20 total samples, for a Queens multi-family ownership group. Clifton, Passaic County, NJ Annual steam-sterilizer feedwater testing for a surgery center under ANSI/AAMI ST108. Bridgewater, Somerset County, NJ Expanded PWTA well testing found a PFAS exceedance requiring disclosure before a home sale. Kingsbridge, Bronx Preschool potable water and lead assessment in the North Bronx. Highbridge, Bronx Potable water testing for a Bronx community development organization's facility. Upper West Side, Manhattan K-8 school lead testing found one elevated fixture while clearing the remaining campus outlets. Bay Ridge, Brooklyn Residential potable water analysis for a Brooklyn property. West Village, Manhattan Large-scale residential lead testing with 58 initial sample points and a 26-sample follow-up. Bushwick / East Williamsburg, Brooklyn Six-fixture federal office screening for Legionella, bacteria, lead and copper; all samples passed. Long Island City, Queens PFAS and lead panel for a Long Island City multi-family property, including a report amendment to add the lead parameter. Prospect Avenue, Bronx Three lead-testing campaigns for a Bronx Head Start early-childhood program. Newark, NJ Charter school lead testing with EDD and Appendix D regulatory reporting. Clinton Hill / Bed-Stuy, Brooklyn Metals, minerals and corrosivity testing cleared a federal facility after discoloration complaints. Rego Park, Queens Early childhood center lead testing with full report, invoice, and RegComp package. Park Avenue, Manhattan Commercial Legionella testing with complete culture, serogroup identification and revised reporting. West Islip, Suffolk County, NY Microplastics testing evaluated a countertop filter; no particles were detected. Kips Bay, Manhattan Annual 17-point deionized-water purity testing for a global pharmaceutical facility. Peapack, Somerset County, NJ New Jersey PWTA-compliant private well panel completed for a real estate transaction. Edison, Middlesex County, NJ Multi-day municipal park testing with 11 expedited E. coli and coliform samples per day. Ossining, Westchester County, NY Expedited Legionella testing at a state correctional housing unit following a positive case. Upper East Side, Manhattan Multi-unit potable water testing across four residential apartments held by a foreign consulate. Chester, Morris County, NJ PWTA well panel completed for a real estate transaction. Staten Island, NY Full-facility potable water testing for a Staten Island community services organization, revised and reissued report. East Hampton, Long Island, NY Full private well panel, expanded to include radiological analysis. Fort Totten, Queens, NY Metals, chemistry and bacteria testing across two U.S. Army Reserve building systems. Upper East Side, Manhattan Three-point residential metals and corrosivity panel confirmed all results within applicable standards. East Hampton, NY Full-spectrum residential baseline across three points; every parameter passed applicable standards. Upper Manhattan Emergency bacteria testing isolated contamination to an unknown foundation source, not the potable tap. Manhattan Valley (Upper West Side), Manhattan Five-point testing cleared the city main and isolated corrosion and sulfide issues within the property. Far Hills, Somerset County, NJ Private well panel completed for a homeowner water quality assessment. Bronx, NY Commercial facility water quality testing in the Bronx. LaGuardia Airport, Terminal B, Queens Three potable-water sampling events at a LaGuardia Airport terminal, with full electronic data deliverables. Upper East Side, Manhattan Legionella testing found two serogroups across four points, indicating a shared-building source. Liberty Township, Warren County, NJ Private well bacteria-failure resampling and revised reporting completed before closing. Upper East Side, Manhattan High-rise apartment lead and potability testing. Morristown, Morris County, NJ Private well bacteria-failure resampling and revised reporting completed before a real estate closing. Forest Hills, Queens Point-of-use potable water testing for a Forest Hills cooperative apartment. Carteret, Middlesex County, NJ PWTA source verification established municipal water service for a New Jersey real estate transaction. Lower Manhattan Transit Hub Pre-opening potable-water clearance for a national restaurant at a Lower Manhattan transit hub. LaGuardia Airport, Queens Annual aviation wastewater panel covering metals, VOCs, SVOCs, PCBs and 40 PFAS compounds. Brooklyn Heights, Brooklyn Condominium testing identified iron-reducing bacteria as the likely cause of discolored hot water. Staten Island, NY Multi-family building lead and potability testing with revised final report. East Village, Manhattan Preschool lead and potability assessment in Lower Manhattan, delivered with EDD for regulatory submission. Bernardsville, Somerset County, NJ Expanded PWTA home-sale panel across raw and treated water; every primary standard passed. Norwalk, Fairfield County, CT Comprehensive 83-parameter potability and microplastics baseline for whole-house filtration planning. Flatiron, Manhattan Sixteen-parameter metals and minerals panel for a wellness facility's cold-plunge tub. Piscataway, Middlesex County, NJ PWTA well panel completed for a real estate transaction. Inwood, Manhattan Two-phase cooperative apartment testing paired a 30-parameter panel with a targeted bacterial retest. Hewitt, Passaic County, NJ 18-compound PFAS panel for a New Jersey Spill Fund-related property assessment. Jackson Heights, Queens Development center lead and potability testing with report and RegComp. Flatiron, Manhattan Potable water commissioning for a Sixth Avenue commercial property. Union Square / Flatiron, Manhattan Three-point E. coli and coliform monitoring from municipal entry to the roof-level supply. South Plainfield, Middlesex County, NJ DI water testing confirmed no bacteria and conductivity within ASTM Type II range. First Avenue, Manhattan Expedited Legionella testing for a Manhattan construction site's compliance timeline. Flatiron District, Manhattan Three-point E. coli and coliform testing across a commercial building returned clean results. Jamaica, Queens GSA commissioning panel for new fixtures, including lead, copper and Legionella under AWWA C651. Greenpoint, Brooklyn Industrial process-water metals testing identified very high nickel in a pre-treatment stream. Staten Island, NY Food service facility potable water testing, repeat engagement across three sampling events. Governors Island, NY Six-event quarterly potable-water monitoring program for a Governors Island facility. Chelsea, Manhattan Three-point E. coli and coliform testing across a commercial building's vertical water supply. Governors Island, NY Recurring facility potable water monitoring, prior-year sampling event. Staten Island, NY Two-point E. coli and coliform testing documented potable-water compliance for a contractor. Staten Island, NY Annual seafood-facility bacteria testing included a clean resample after ice-machine remediation. Central Park West, Manhattan Apartment Legionella testing with full culture, speciation and revised reporting. Brewster, Putnam County, NY Eight-point office Legionella screening found elevated L. pneumophila at two matching fixtures. Upper East Side, Manhattan Legionella panel at a East 70th Street residential property, run alongside the standard potable panel. Staten Island, NY Repeat hydrant and water-main clearance testing at two Staten Island construction sites, all clean. Saddle River, Bergen County, NJ Private well panel expanded to include gross alpha radiological and PFAS analysis, treated and untreated points. Bethpage, Long Island, NY Multi-point potability testing for a food-service facility, with every sample passing. Tribeca, Manhattan Tribeca high-rise baseline covered hot and cold water, with no PFAS or microplastics detected. Corona, Queens Four lead-testing campaigns for an educational center, with complete regulatory documentation.

Water testing for Manhattan apartments & buildings.

Olympian Water Testing Manhattan is a professional water testing company that has served New York City since 1991, delivering advanced water quality and water analysis services for residential, commercial, and institutional properties across Manhattan, Brooklyn, Queens, the Bronx, Staten Island, and the greater NYC area. Our certified and licensed experts manage the entire process, from on-site sample collection to clear, well-documented reporting, applying professional laboratory-grade methods and the analytical standards expected of accredited testing labs, so your results stay defensible for regulatory, legal, and real estate purposes. 

We perform lead testing, potability testing, and bacteria testing, including E. coli, total coliform, and turbidity, along with Legionella testing, PFAS testing, and microplastics testing, while our consultant-driven approach helps property owners, management companies, schools, healthcare facilities, and businesses choose the right panel with confidence. From start to finish, our focus stays on responsive service, accurate laboratory analysis, and practical guidance you can act on, work held to the same standard that defines NELAP and NYS ELAP accredited laboratories and that Manhattan property owners and professionals have trusted for more than three decades.

Elite Industry Standards Fully Insured:  Professional Liability (E&O) General Liability Workers’ Compensation

Testing Services

What We Test For

Chemical & Metal Analysis

Lead & Heavy Metals

Lead, copper, arsenic, iron, manganese. Certified analysis at the point of use for every property type.

EPA Method 200.8

PFAS Testing

PFOA, PFOS, and comprehensive PFAS panels. Only lab analysis detects them.

EPA 533 / 537.1

Corrosion & Brown Water

Copper, iron, manganese, zinc, pH. Source of staining, taste, and discoloration.

EPA 200.8

VOCs & Disinfection Byproducts

THMs, HAA5, volatile organics, and additional chemical panels.

EPA 524.2

Chemical & Metal Analysis

Bacteria & Potability

Total coliform, E. coli, HPC. Potability confirmed at the point of use.

SM 9223B

Legionella Testing

Point-of-use analysis at showers, faucets, pools, and decorative water features.

ISO 11731

Multi-Draw Diagnostic Sampling

Sequential samples from the same fixture identify contamination source fixture, branch pipe, or building riser.

Diagnostic

VOCs & Emerging Contaminants

Volatile organics, disinfection byproducts, THMs, HAA5, and additional chemical screening panels.

EPA Method 200.8

Manhattan Neighborhoods

Water testing across all Manhattan.

Upper East & West Side

Pre-War Co-ops & Rentals

The highest concentration of pre-war residential buildings in Manhattan. Original plumbing materials common throughout these neighborhoods.

Midtown

High-Rise Residential Towers

Complex recirculation systems and high-rise plumbing with unique water quality considerations across residential and commercial properties.

Chelsea, SoHo & Tribeca

Converted Buildings & Lofts

Former industrial and commercial buildings converted to residential use. Plumbing systems vary significantly from purpose-built residential stock.

Harlem & Washington Heights

Older Rental & Brownstone Stock

Some of Manhattan’s oldest continuously occupied residential buildings. Pre-war construction with original service lines and riser materials.

Lower Manhattan

Mixed Commercial & Residential

Converted office towers and new residential development alongside historic commercial buildings with varied plumbing histories.

East Village & Lower East Side

Tenements & Walk-Ups

Original tenement buildings from the 1890s–1920s alongside renovated properties. Water testing for older building stock available.

How It Works

Simple from start to finish

01

Manhattan

Pre-war co-ops, high-rise towers, brownstones, and commercial properties throughout the borough.

02

On-Site Sampling

Certified specialists collect samples directly from your fixtures at your Manhattan property — with full chain-of-custody documentation.

03

Certified Results

NYS ELAP certified results from NELAP accredited analysis — with EPA action level comparisons and plain-language findings.

Water Testing for Lead in Manhattan Co Op Apartments and Condominiums

Lead remains one of the most closely monitored water quality concerns in Manhattan apartment buildings, particularly in co-op properties and older condominiums where portions of the plumbing system may predate modern standards. While New York City’s water supply does not contain lead when it leaves the distribution system, exposure risk can occur within building infrastructure and unit-level plumbing components.

In many co-op buildings and prewar condominiums, plumbing systems may include legacy materials such as older service connections, solder, or fixtures that can contribute to lead presence under certain conditions. Water that remains stagnant in pipes for extended periods, such as overnight or in low-occupancy units, has more time to interact with these materials. This interaction can result in elevated lead levels at the tap, even when incoming water meets all regulatory standards.

Testing for lead in Manhattan apartments is conducted using first draw sampling methods that capture water after a period of non-use. This approach reflects real-world conditions experienced by residents and provides a more accurate assessment of potential exposure. In multi-unit buildings, results may vary between apartments depending on plumbing layout, floor level, and recent usage patterns.

For co-op boards, building management, and supers, lead testing is an important component of maintaining building safety and transparency. It supports proactive maintenance decisions and provides documentation that can be shared with residents. For individual unit owners and tenants, testing offers clarity about conditions within their specific apartment, ensuring confidence in daily water use.

FAQ

Frequently asked questions

Why does my Manhattan apartment sometimes have brown or cloudy water

Brown or cloudy water in a Manhattan apartment is usually related to temporary changes within the building plumbing system or nearby infrastructure activity rather than a problem with the city’s water supply. Cloudy water is often caused by tiny air bubbles that enter the system when pressure changes occur. This type of cloudiness typically clears after the water sits for a short time.

Brown or discolored water is commonly linked to sediment or particles that have been disturbed inside pipes. This can happen during hydrant flushing, construction work, or shifts in water flow within the building. Older plumbing systems may also contribute when internal buildup is loosened and carried through the pipes.

In most cases, these changes are short term and improve after running the water briefly. If the issue continues or occurs frequently, testing can help determine whether the cause is related to building plumbing conditions or another factor.

Manhattan tap water is generally considered safe for drinking and cooking when it leaves the city’s distribution system. The water is sourced from protected reservoirs and treated to meet strict safety standards. Regular monitoring ensures that it remains compliant across the municipal network.

However, once water enters a building, its quality can be influenced by internal plumbing systems. Co-op apartments, condominiums, and rental buildings may have pipes, fixtures, or storage systems that affect water conditions before it reaches the tap. These factors can vary significantly from one building to another and even between units.

For this reason, while the city supply is reliable, testing at the point of use provides a clearer understanding of actual conditions within a specific apartment. This helps residents confirm that water used for drinking and cooking meets their expectations based on their building environment.

The frequency of water testing in Manhattan co-op and condominium buildings depends on factors such as building age, plumbing condition, and occupancy patterns. In general, routine testing is recommended to monitor conditions and identify changes over time. Buildings with older infrastructure or complex plumbing systems may benefit from more frequent evaluations.

Testing is especially important after renovations, plumbing repairs, or any noticeable changes in water appearance or taste. These situations can alter system conditions and may affect water quality at the point of use.

For co-op boards and property managers, establishing a consistent testing schedule supports proactive maintenance and helps ensure transparency with residents. It also provides documentation that can be used to guide future upgrades or system improvements.

Regular testing offers a practical way to maintain confidence in water conditions across all units within the building.

Yes, building plumbing can have a direct impact on water quality, even when the city supply entering the property meets all safety standards. Once water moves beyond the municipal system and into a building, it interacts with internal pipes, fittings, storage tanks, and fixtures that vary in material and condition.

In Manhattan buildings, especially older co-ops and brownstones, plumbing systems may include components that have been in place for many years. Over time, these systems can influence water conditions through factors such as corrosion, buildup, or extended periods of stagnation.

High rise buildings introduce additional complexity through risers, pressure zones, and recirculation systems, all of which can affect how water is distributed and how long it remains within the system.

Because these conditions are specific to each building, water quality can differ between properties and even between apartments in the same building. Testing at the point of use provides a clear understanding of how internal plumbing is affecting water.

If tenants suspect a change in water quality within their Manhattan apartment, the first step is to observe whether the issue is temporary or persistent. Running the water for a short period can help determine if the condition improves, particularly in cases related to sediment or air in the system.

It is also important to check whether the issue is isolated to a single fixture or present throughout the apartment. This can provide useful information about whether the cause is localized or related to the broader building plumbing system.

Tenants should notify building management or the superintendent, as they are responsible for overseeing plumbing conditions within the property. Reporting the issue allows for inspection and coordination of any necessary maintenance.

For a more accurate assessment, professional water testing can be conducted to identify specific conditions at the tap. This provides clear data that can guide next steps and ensure that any concerns are properly addressed.

Blog

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Service Area

Serving all Manhattan.

Every neighborhood. Every property type. Serving Manhattan since 1991.

Upper East Side Upper West Side Midtown East Midtown West
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Harlem Washington Heights East Village Lower East Side
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Schedule water testing for your Manhattan property.

Residential and commercial. Every Manhattan neighborhood. Available 24 hours, 365 days.

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