RECENT PROJECTS ★★★★★
First Avenue, Manhattan Expedited Legionella testing for a Manhattan construction site's compliance timeline. West Islip, Suffolk County, NY Microplastics testing evaluated a countertop filter; no particles were detected. Clifton, Passaic County, NJ Annual steam-sterilizer feedwater testing for a surgery center under ANSI/AAMI ST108. Corona, Queens Four lead-testing campaigns for an educational center, with complete regulatory documentation. Ossining, Westchester County, NY Expedited Legionella testing at a state correctional housing unit following a positive case. Union Square / Flatiron, Manhattan Three-point E. coli and coliform monitoring from municipal entry to the roof-level supply. Hewitt, Passaic County, NJ 18-compound PFAS panel for a New Jersey Spill Fund-related property assessment. Bernardsville, Somerset County, NJ Expanded PWTA home-sale panel across raw and treated water; every primary standard passed. Morristown, Morris County, NJ Private well bacteria-failure resampling and revised reporting completed before a real estate closing. Staten Island, NY Food service facility potable water testing, repeat engagement across three sampling events. Upper East Side, Manhattan Legionella panel at a East 70th Street residential property, run alongside the standard potable panel. Governors Island, NY Recurring facility potable water monitoring, prior-year sampling event. Upper Manhattan Emergency bacteria testing isolated contamination to an unknown foundation source, not the potable tap. Central Park West, Manhattan Apartment Legionella testing with full culture, speciation and revised reporting. Bushwick / East Williamsburg, Brooklyn Six-fixture federal office screening for Legionella, bacteria, lead and copper; all samples passed. Rego Park, Queens Early childhood center lead testing with full report, invoice, and RegComp package. Bay Ridge, Brooklyn Residential potable water analysis for a Brooklyn property. Forest Hills, Queens Point-of-use potable water testing for a Forest Hills cooperative apartment. East Village, Manhattan Preschool lead and potability assessment in Lower Manhattan, delivered with EDD for regulatory submission. Jamaica, Queens GSA commissioning panel for new fixtures, including lead, copper and Legionella under AWWA C651. Staten Island, NY Annual seafood-facility bacteria testing included a clean resample after ice-machine remediation. LaGuardia Airport, Terminal B, Queens Three potable-water sampling events at a LaGuardia Airport terminal, with full electronic data deliverables. Flatiron, Manhattan Sixteen-parameter metals and minerals panel for a wellness facility's cold-plunge tub. Lower Manhattan Transit Hub Pre-opening potable-water clearance for a national restaurant at a Lower Manhattan transit hub. Bridgewater, Somerset County, NJ Expanded PWTA well testing found a PFAS exceedance requiring disclosure before a home sale. Peapack, Somerset County, NJ New Jersey PWTA-compliant private well panel completed for a real estate transaction. Prospect Avenue, Bronx Three lead-testing campaigns for a Bronx Head Start early-childhood program. Manhattan Valley (Upper West Side), Manhattan Five-point testing cleared the city main and isolated corrosion and sulfide issues within the property. Fort Totten, Queens, NY Metals, chemistry and bacteria testing across two U.S. Army Reserve building systems. Brooklyn Heights, Brooklyn Condominium testing identified iron-reducing bacteria as the likely cause of discolored hot water. Carteret, Middlesex County, NJ PWTA source verification established municipal water service for a New Jersey real estate transaction. 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. Upper East Side, Manhattan Multi-unit potable water testing across four residential apartments held by a foreign consulate. Jackson Heights, Queens Development center lead and potability testing with report and RegComp. Governors Island, NY Six-event quarterly potable-water monitoring program for a Governors Island facility. Upper East Side, Manhattan Legionella testing found two serogroups across four points, indicating a shared-building source. West Village, Manhattan Large-scale residential lead testing with 58 initial sample points and a 26-sample follow-up. Edison, Middlesex County, NJ Multi-day municipal park testing with 11 expedited E. coli and coliform samples per day. Staten Island, NY Multi-family building lead and potability testing with revised final report. Kips Bay, Manhattan Annual 17-point deionized-water purity testing for a global pharmaceutical facility. Brewster, Putnam County, NY Eight-point office Legionella screening found elevated L. pneumophila at two matching fixtures. Park Avenue, Manhattan Commercial Legionella testing with complete culture, serogroup identification and revised reporting. Liberty Township, Warren County, NJ Private well bacteria-failure resampling and revised reporting completed before closing. Greenpoint, Brooklyn Industrial process-water metals testing identified very high nickel in a pre-treatment stream. Far Hills, Somerset County, NJ Private well panel completed for a homeowner water quality assessment. Chester, Morris County, NJ PWTA well panel completed for a real estate transaction. Highbridge, Bronx Potable water testing for a Bronx community development organization's facility. Staten Island, NY Two-point E. coli and coliform testing documented potable-water compliance for a contractor. South Plainfield, Middlesex County, NJ DI water testing confirmed no bacteria and conductivity within ASTM Type II range. East Hampton, Long Island, NY Full private well panel, expanded to include radiological analysis. Kingsbridge, Bronx Preschool potable water and lead assessment in the North Bronx. Newark, NJ Charter school lead testing with EDD and Appendix D regulatory reporting. Norwalk, Fairfield County, CT Comprehensive 83-parameter potability and microplastics baseline for whole-house filtration planning. LaGuardia Airport, Queens Annual aviation wastewater panel covering metals, VOCs, SVOCs, PCBs and 40 PFAS compounds. Flatiron District, Manhattan Three-point E. coli and coliform testing across a commercial building returned clean results. Bronx, NY Commercial facility water quality testing in the Bronx. Saddle River, Bergen County, NJ Private well panel expanded to include gross alpha radiological and PFAS analysis, treated and untreated points. Chelsea, Manhattan Three-point E. coli and coliform testing across a commercial building's vertical water supply. Clinton Hill / Bed-Stuy, Brooklyn Metals, minerals and corrosivity testing cleared a federal facility after discoloration complaints. Tribeca, Manhattan Tribeca high-rise baseline covered hot and cold water, with no PFAS or microplastics detected. Upper East Side, Manhattan Three-point residential metals and corrosivity panel confirmed all results within applicable standards. Staten Island, NY Full-facility potable water testing for a Staten Island community services organization, revised and reissued report. Piscataway, Middlesex County, NJ PWTA well panel completed for a real estate transaction. East Hampton, NY Full-spectrum residential baseline across three points; every parameter passed applicable standards. Staten Island, NY Repeat hydrant and water-main clearance testing at two Staten Island construction sites, all clean. Ridgewood, Queens Ten point-of-use lead assessment, 20 total samples, for a Queens multi-family ownership group. Inwood, Manhattan Two-phase cooperative apartment testing paired a 30-parameter panel with a targeted bacterial retest. Lincoln Square, Manhattan Lead testing at 11 early-childhood fixtures, sampled before program hours. Upper East Side, Manhattan High-rise apartment lead and potability testing. Bethpage, Long Island, NY Multi-point potability testing for a food-service facility, with every sample passing. Flatiron, Manhattan Potable water commissioning for a Sixth Avenue commercial property. 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. Upper West Side, Manhattan K-8 school lead testing found one elevated fixture while clearing the remaining campus outlets.
RECENT PROJECTS ★★★★★
LaGuardia Airport, Terminal B, Queens Three-event potable-water testing with electronic deliverables. Hewitt, Passaic County, NJ 18-compound PFAS panel for a New Jersey property assessment. West Village, Manhattan Lead testing with 58 initial samples and a 26-sample follow-up. Upper East Side, Manhattan Potable-water testing across four consulate-held apartments. Lower Manhattan Transit Hub Pre-opening potable-water clearance for a national restaurant. Upper Manhattan Emergency testing isolated a non-potable contamination source. Morristown, Morris County, NJ Private well resampling completed before a real estate closing. Edison, Middlesex County, NJ Expedited E. coli and coliform testing at a municipal park. Kips Bay, Manhattan Annual 17-point DI-water purity testing for a pharmaceutical site. Newark, NJ Charter school lead testing with complete regulatory reporting. Lincoln Square, Manhattan Lead testing at 11 early-childhood fixtures before program hours. First Avenue, Manhattan Expedited construction-site Legionella testing. Brewster, Putnam County, NY Office Legionella screening found two elevated fixtures. Ossining, Westchester County, NY Expedited correctional-facility Legionella testing. Upper East Side, Manhattan Residential Legionella and standard potability panel. Peapack, Somerset County, NJ PWTA private well panel for a real estate transaction. East Hampton, Long Island, NY Private well panel with radiological analysis. Far Hills, Somerset County, NJ Private well water-quality assessment. Saddle River, Bergen County, NJ Treated and untreated well testing with PFAS and radiologicals. Piscataway, Middlesex County, NJ PWTA well panel for a real estate transaction. Chester, Morris County, NJ PWTA well panel for a real estate transaction. Carteret, Middlesex County, NJ Source verification confirmed municipal water service. Liberty Township, Warren County, NJ Well bacteria-failure resampling completed before closing. Sunset Park, Brooklyn Two-event academy lead assessment with electronic deliverables. Corona, Queens Four lead-testing campaigns with regulatory documentation. Prospect Avenue, Bronx Three lead-testing campaigns for a Bronx Head Start program. Upper West Side, Manhattan School lead testing found one elevated fixture campus-wide. East Village, Manhattan Preschool lead and potability testing with regulatory EDD. Kingsbridge, Bronx Preschool potability and lead testing. Rego Park, Queens Early-childhood lead testing with RegComp reporting. Jackson Heights, Queens Development-center lead and potability testing. East 70th Street, Manhattan Residential Legionella and standard potability panel. Upper East Side, Manhattan Legionella testing indicated a shared-building source. Ridgewood, Queens Ten-point lead assessment totaling 20 samples. Governors Island, NY Six-event quarterly potable-water monitoring program. Staten Island, NY Repeat hydrant and water-main clearance testing; all clean. Park Avenue, Manhattan Commercial Legionella culture and serogroup testing. Flatiron, Manhattan Commercial potable-water commissioning. Jamaica, Queens GSA fixture commissioning for lead, copper and Legionella. Greenpoint, Brooklyn Process-water metals testing found very high nickel. Bethpage, Long Island, NY Multi-point food-service potability testing; all samples passed. Staten Island, NY Three-event food-service potable-water testing. Flatiron, Manhattan Metals and minerals testing for a cold-plunge tub. Highbridge, Bronx Potable-water testing for a community facility. Staten Island, NY Full-facility potable-water testing with revised reporting. Central Park West, Manhattan Apartment Legionella culture and speciation testing. Inwood, Manhattan Thirty-parameter panel with targeted bacterial retesting. Forest Hills, Queens Cooperative apartment point-of-use potability testing. Bay Ridge, Brooklyn Residential potable-water analysis. Brooklyn Heights, Brooklyn Testing identified iron-reducing bacteria in discolored hot water. Long Island City, Queens PFAS and lead panel for a multi-family property. Upper East Side, Manhattan High-rise apartment lead and potability testing. Chelsea, Manhattan Three-point bacteria testing across a building water supply. Union Square / Flatiron, Manhattan Three-point bacteria monitoring from entry to rooftop supply. Bronx, NY Commercial facility water-quality testing. Governors Island, NY Recurring facility potable-water monitoring. Staten Island, NY Multi-family lead and potability testing. Staten Island, NY Two-point bacteria testing documented potable-water compliance. Clifton, Passaic County, NJ Annual surgical-center feedwater testing under AAMI ST108. West Islip, Suffolk County, NY Countertop-filter microplastics testing; none detected. Manhattan Valley (Upper West Side), Manhattan Testing isolated internal corrosion and sulfide issues. Clinton Hill / Bed-Stuy, Brooklyn Federal-facility testing after discoloration complaints. Flatiron District, Manhattan Three-point building bacteria testing; all results clean. South Plainfield, Middlesex County, NJ DI water met ASTM Type II range with no bacteria detected. Bridgewater, Somerset County, NJ Expanded PWTA testing found a reportable PFAS exceedance. Fort Totten, Queens, NY Water testing across two Army Reserve building systems. East Hampton, NY Three-point full-spectrum residential baseline; all passed. Tribeca, Manhattan High-rise baseline found no PFAS or microplastics. Bernardsville, Somerset County, NJ Expanded PWTA panel; every primary standard passed. LaGuardia Airport, Queens Annual aviation wastewater panel including 40 PFAS compounds. Bushwick / East Williamsburg, Brooklyn Six-fixture federal office screening; all samples passed. Upper East Side, Manhattan Three-point residential metals and corrosivity testing. Norwalk, Fairfield County, CT 83-parameter potability and microplastics baseline. Staten Island, NY Annual bacteria testing with clean post-remediation resample.
NELAP Accredited Analysis · NYS ELAP Certified Results · NY · NJ · CT · Since 1991

Certified Water Testing Companies.

Olympian Water Testing provides certified water testing and analysis across New York, New Jersey, and Connecticut for residential, commercial, educational, and industrial properties.
01
Lead Testing
Certified lead and heavy metal water analysis for homes and buildings.
02
Bacteria & Potability
Drinking water safety testing for coliform, E. coli, and potability.
03
Legionella Testing
Certified Legionella water sampling and compliance testing services.
04
PFAS & Chemicals
Advanced contaminant and PFAS analysis using EPA-approved methods.
05
Private Well Testing
Comprehensive well water analysis for homeowners and buyers.
06
Diagnostic Analysis
Advanced testing for unusual water quality and contamination issues.
07
Schools & 3Ts
Water testing programs for schools and childcare facilities.
08
Water Quality Reports
Easy-to-read certified reporting for compliance and property records.
Elite Industry Standards Fully Insured:  Professional Liability (E&O) General Liability Workers’ Compensation
NYS ELAP Certified Results
NELAP Accredited Analysis
Full Chain of Custody
EPA-Approved Methods
35+ Years — Since 1991

Water Testing Services

Certified laboratory water testing — all services

Click a category to expand. All services include certified results, water quality reports, and expert consultation.

Lead & Heavy Metals Pb, Cu, As, Fe, Mn, Zn at point of use. NYS ELAP certified results. EPA 200.8
PFAS Analysis PFOA, PFOS, PFNA, and related compounds. NJ MCL-compliant. EPA 533/537.1
1,4-Dioxane NYS 1 ppb MCL comparison. Long Island and NJ groundwater. EPA 522
VOCs & Organics Volatile organic compounds including benzene, toluene, and trihalomethanes. EPA 524.2
Bacteria & Potability Total coliform, E. coli, HPC, and potability analysis at point of use. SM 9223B
Legionella Point-of-Use Legionella at showers, faucets, pools, spas. ISO 11731
Private Well Panel Bacteria, arsenic, nitrates, radon, PFAS, 1,4-dioxane, iron, manganese, pH, hardness. Multiple
PWTA Compliance NJ Private Well Testing Act compliance analysis accepted by NJ DEP. PWTA
Arsenic & Nitrates Naturally occurring NJ and LI groundwater contaminants. EPA 200.8/300.0
Multi-Draw Diagnostic Sequential sampling identifies contamination source — fixture, pipe, or riser. Diagnostic
Water Quality Reports Certified reports with EPA action level comparisons and expert findings. All Services

Who We Serve

Water testing for all property types

Property Management Companies

Certified water testing programs for property management companies managing multi-building portfolios. Lead, potability, Legionella, and annual water quality analysis.

EPA 200.8

Co-ops, Condos & Apartments

Building-wide lead testing, Legionella sampling, and water quality programs for co-op boards, condo associations, and multi-family buildings.

EPA 200.8

Restaurants & Food Businesses

DOH compliance water testing for food businesses. Certified potability, bacteria, and E. coli analysis accepted by NYC DOH, NJ DEP, and CT DOH.

Diagnostic
Schools, Daycares & BOCES

Lead testing under NYS 3Ts program. Certified results, compliance reports, and remediation guidance.

3Ts / NYS ELAP
Private Well Homeowners & Buyers

Annual well testing and PWTA-compliant analysis. Pre-purchase panels accepted by real estate attorneys.

EPA 200.8

Tenants, Renters & Landlords

Individual unit and building-wide water testing. Certified results accepted by regulatory agencies and attorneys.

EPA 200.8

How certified water testing works

01

Consultation

Determine appropriate testing panels and sampling locations for your property.

02

Certified On-Site Sampling

EPA-approved on-site sampling with full chain-of-custody documentation.

03

Lab Analysis

NELAP accredited analysis. Results certified by NYS ELAP.

04

Reports Delivered

Certified water quality reports with EPA action level comparisons and findings.

Speak with a certified water testing expert

Olympian Water Testing is the name to know when you are searching for reliable water testing companies in NYC, because we make understanding your water simple, clear, and stress-free. As a certified and licensed water testing company, we serve residential and commercial properties across Brooklyn, Queens, Manhattan, the Bronx, and Staten Island, helping homeowners, businesses, and property management companies feel confident about what comes out of every tap. Our experts deliver dependable water quality and water analysis services tailored to your property, and a quick conversation with our consultant is all it takes to choose the right tests, plan your sample collection, and stay aligned with the standards that apply to your building. Our services cover the tests that matter most, including lead testing, potability testing, and bacteria testing, plus screening for e coli, total coliform, and turbidity, along with legionella testing, PFAS testing, and microplastics testing for properties of every size. Every sample is processed to deliver NYS ELAP Certified Results and NELAP Accredited Analysis, backed by lab-quality care and clear, fully documented reporting for everyday peace of mind or formal compliance. From a single check to a complete panel, our certified experts handle collection, evaluation, and detailed reports, so NYC property owners get the kind of honest service that makes choosing the right water testing company an easy decision.

New York
New Jersey
Connecticut
(212) 461-3879
Serving NYC five boroughs, Westchester County, and Long Island — all property types, all contaminants, 24 hours, 365 days.

Water testing company questions

NYS ELAP certified results. NELAP accredited analysis. Every sample processed under full chain-of-custody protocols with EPA-approved analytical methods. EPA-approved analytical methods. Full chain of custody on every sample. 35+ years in service since 1991.
New York (all five boroughs, Westchester, Long Island), New Jersey (Bergen, Essex, Morris, Hudson, Union, Middlesex, Monmouth, Somerset, and Hunterdon counties), and Connecticut (Fairfield, New Haven, and Litchfield counties).
Yes. Property management companies, co-op boards, condo associations, apartment buildings, restaurants, food businesses, schools, daycares, BOCES, hospitals, hotels, and all commercial property types.
 
Yes. Accepted by NYC DOH, NYS DOH, NJ DEP, CT DEEP, EPA programs, local health departments, building attorneys, real estate professionals, and mortgage lenders.

Blog

Water testing resources

How Bergen County Families Can Think More Clearly About Lead, Bacteria, and PFAS

How Bergen County Families Can Think More Clearly About Lead, Bacteria, and PFAS

For many residents in Queens, the morning routine is as predictable as the city itself: you turn on the faucet, fill the kettle or a…

Why Water Testing Matters in Queens Homes Even When the Water Looks Fine

Why Water Testing Matters in Queens Homes Even When the Water Looks Fine

For many residents in Queens, the morning routine is as predictable as the city itself: you turn on the faucet, fill the kettle or a…

Why Lead and Copper Work Best Together in a Stronger Water Report

Why Lead and Copper Work Best Together in a Stronger Water Report

When homeowners or property managers receive a water quality report, the document is often filled with technical data that can be difficult to interpret. Among…

Service Areas

NY · NJ · CT

  • NYC Five Boroughs
  • Westchester & Long Island
  • NJ Bergen, Essex, Morris
  • Jersey City & Hudson County
  • CT Fairfield, New Haven
  • All Property Types
Manhattan
Brooklyn
Queens
The Bronx
Staten Island
Westchester
Long Island
Bergen County
Jersey City
Essex County
Fairfield CT
New Haven CT

Find the right certified water testing company for your property.

NY · NJ · CT · All property types

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