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.
Certified Water Testing Laboratory Experts · Brooklyn · Since 1991

Water Testing & Analysis in Brooklyn.

NYS ELAP certified water testing and analysis for Brooklyn property owners, co-op boards, property managers, food businesses, schools, and institutions.

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

Results by

NYS ELAP Certified Lab

Analysis by

NELAP Accredited Lab

Full

Chain of Custody

EPA

Approved Methods

Certified

Water Testing Experts

35+

Years of Service

Since 1991

Serving Brooklyn

Water Testing & Analysis Services

Certified Laboratory Water Testing in Brooklyn

Lead testing · Potability testing · Legionella testing · PFAS analysis · Bacteria & E. coli · Total coliform · Turbidity · VOC analysis · Water quality reports · Certified results

Lead Testing & Heavy Metals Analysis

Certified lead testing for Brooklyn brownstones, pre-war buildings, co-ops, condominiums, and commercial properties. Lead, copper, arsenic, iron, manganese. On-site sampling at the point of use. No safe level of lead in drinking water exists.

EPA Method 200.8

Analytical Method

EPA Method 200.8 — ICP-MS

Results Certified by

NYS ELAP Certified Laboratory

Analysis by

NELAP Accredited Laboratory

Bacteria Testing & Potability Analysis

Total coliform, E. coli, HPC, and potability testing at the point of use. Required for food businesses, restaurants, schools, daycares, and commercial properties with NYC DOH compliance requirements throughout Brooklyn.

SM 9223B

Analytical Method

SM 9223B — Colilert

Parameters

Total coliform · E. coli · HPC

Analysis by

NELAP Accredited Laboratory

Legionella Water Testing

Point-of-use Legionella analysis at showers, faucets, pools, spas, and decorative water features for Brooklyn residential and commercial properties. Certified results with complete documentation.

ISO 11731

Analytical Method

ISO 11731 — Culture method

Sample Points

Showers · Faucets · Pools · Spas · Water features

Analysis by

NELAP Accredited Laboratory

PFAS & Chemical Contaminant Analysis

Comprehensive PFAS screening — PFOA, PFOS, and related compounds. No color, taste, or odor at any concentration. Only certified laboratory analysis detects them. Available standalone or as part of a full panel.

EPA 533 / 537.1

Analytical Method

EPA 533 · EPA 537.1

Compounds

PFOA · PFOS · GenX · 40+ PFAS compounds

Analysis by

NELAP Accredited Laboratory

Corrosion, Turbidity & Water Quality Analysis

Copper, iron, manganese, zinc, pH, turbidity, hardness. Full water quality reports identifying the source of discoloration, metallic taste, scaling, and corrosion in Brooklyn building plumbing systems.

EPA 200.8

Parameters

Cu · Fe · Mn · Zn · pH · Turbidity · Hardness

Deliverable

Full water quality report with findings

Analysis by

NELAP Accredited Laboratory

Multi-Draw Diagnostic Water Analysis

Sequential certified sampling from the same fixture at timed intervals. Identifies contamination source — fixture, branch pipe, unit riser, or building riser. Diagnostic reports included with all results.

Diagnostic

Method

Sequential timed draws from single fixture

Identifies

Fixture · Branch pipe · Unit riser · Building riser

Deliverable

Diagnostic report with source determination

Commercial & Institutional Water Testing

Brooklyn commercial water testing clients

Property Management Companies

Certified water testing programs for Brooklyn property management companies. Lead, potability, Legionella, and annual water quality reports.

Restaurants & Food Businesses

NYC DOH and EPA compliance testing for Brooklyn food businesses, restaurants, and food packaging facilities.

Schools, Daycares & BOCES

Lead testing under New York State's 3Ts program. NYS DOH compliant sampling, certified results, and remediation guidance.

Brownstones & Pre-War Buildings

Lead testing, potability analysis, and water quality reports for Brooklyn's historic building stock across all neighborhoods.

Co-ops, Condominiums & Hi-Rise Buildings

Building-wide lead testing, Legionella sampling, and certified water quality analysis for co-op boards and condo associations.

Home Buyers & Sellers

Pre-purchase and pre-listing certified water testing for Brooklyn homes. Results accepted by attorneys and mortgage lenders.

From consultation to certified results

01

Consultation

Speak with our water testing consultants to determine appropriate testing panels, sampling locations, and compliance requirements for your Brooklyn property or facility.

02

Certified On-Site Sampling

Certified water testing specialists collect samples at your property following EPA-approved protocols with full chain-of-custody documentation from collection through laboratory analysis.

03

Laboratory Analysis & Reports

Analysis by NELAP accredited analysis. Results certified by NYS ELAP. Water quality reports with EPA action level comparisons and expert findings delivered.

FAQ

Frequently asked questions

Why does brown water sometimes appear in Brooklyn buildings

Brown water in Brooklyn buildings is typically caused by sediment or internal buildup that becomes dislodged within plumbing systems. This can occur due to changes in water flow, pressure shifts, hydrant flushing, or nearby construction activity. In older buildings, pipes may contain accumulated material that remains stable under normal conditions but can be disturbed when system dynamics change.

While brown water is often temporary and clears after running the tap, recurring issues may indicate underlying plumbing conditions that require further evaluation. Because visual appearance alone cannot determine the cause, certified water testing laboratories analyze samples to identify whether sediment, corrosion, or other factors are contributing to the issue.

Professional water testing consultants use these results to assess whether the condition is isolated or related to broader building infrastructure.

Brooklyn tap water is generally safe for drinking and cooking when it leaves the municipal distribution system. New York City sources its water from protected reservoirs and treats it to meet strict safety standards before it reaches residential areas.

However, water quality can change once it enters a building’s internal plumbing system. Many Brooklyn properties, including brownstones, co-op apartments, and rental buildings, may have infrastructure that influences water conditions at the point of use. Factors such as corrosion, aging pipes, and system design can affect water before it reaches the tap.

For this reason, professional water testing provides a more accurate understanding of conditions within a specific building or apartment. Certified laboratory analysis ensures that water quality is evaluated based on actual usage conditions rather than general system-wide data.

The frequency of water testing in Brooklyn apartments depends on building age, plumbing condition, and occupancy patterns. In general, periodic testing is recommended to monitor water conditions and identify any changes over time.

Older buildings with aging infrastructure or mixed plumbing materials may benefit from more frequent testing, as these systems are more likely to influence water quality. Testing is also advisable following plumbing repairs, renovations, or noticeable changes in water appearance or taste.

Professional water testing consultants often recommend establishing a routine schedule tailored to the building’s characteristics. Certified laboratory analysis provides consistent data that helps track trends and supports proactive maintenance decisions.

Regular testing ensures that water quality is monitored accurately and helps maintain confidence in drinking water conditions within the building.

Yes, building plumbing can influence water quality even when the city supply entering the building meets all safety standards. Once water transitions into a property’s internal plumbing system, it interacts with pipes, fittings, and fixtures that vary in material and condition.

In Brooklyn buildings, particularly older properties, plumbing systems may include components that contribute to corrosion or internal buildup over time. These conditions can affect the presence of metals, sediment, or other factors within the water.

Because each building has a unique plumbing configuration, water quality can vary between units and floors. Certified water testing laboratories analyze samples from specific fixtures to determine how internal systems are affecting water conditions.

Professional consultants interpret these results to provide a clear understanding of whether any issues are related to building infrastructure rather than the municipal supply.

Professional water testing laboratories analyze a wide range of contaminants to provide a comprehensive assessment of drinking water quality. These typically include metals such as lead and copper, which are often associated with plumbing systems and corrosion.

Laboratories also test for microbial indicators, including heterotrophic plate count, total coliform, and E. coli, to evaluate the presence of bacteria within the system. In addition, analysis may include emerging contaminants such as PFAS, which require specialized testing methods due to their low concentration levels.

Other parameters, such as sediment and overall water composition, are evaluated to understand physical and chemical conditions. Certified laboratories use advanced instrumentation and standardized procedures to ensure accurate results.

Professional water testing consultants review laboratory reports and provide guidance based on the findings, helping property owners and residents understand water conditions and determine appropriate next steps.

Blog

Bronx water testing resources

Bedford-Stuyvesant Brownstones Show Why Generic Testing Falls Short

Bedford-Stuyvesant Brownstones Show Why Generic Testing Falls Short

Bed-Stuy is defined by its breathtaking rows of brownstones—architectural gems that serve as both historic landmarks and family homes. But for residents living in these…

Why One Sink Rarely Tells the Whole Water Story

Why One Sink Rarely Tells the Whole Water Story

In a borough like Brooklyn, where our housing stock spans everything from century-old brownstones to modern glass towers, it is a common convenience to test…

Fort Greene Apartment Buildings Often Need More Than One Sample Point

Fort Greene Apartment Buildings Often Need More Than One Sample Point

Fort Greene is a neighborhood defined by its stunning architecture—from the stately brownstones lining its leafy streets to the diverse range of mid-century and modern…

Brooklyn Service Area

Certified water testing across Brooklyn

  • Commercial & Industrial Properties
  • Schools, Daycares & BOCES
  • Condominiums & Co-ops
  • Apartments & Residential Buildings
  • Home Buyers & Sellers
  • Brownstones & Pre-War Buildings
Park Slope Williamsburg Bed-Stuy Crown Heights
Carroll Gardens DUMBO Brooklyn Heights Fort Greene
Cobble Hill Prospect Heights Flatbush Bushwick
Greenpoint Red Hook Sunset Park Bay Ridge
Bensonhurst Sheepshead Bay Canarsie Borough Park

Speak with a certified water testing expert in Brooklyn.

Olympian Water Testing of Brooklyn is a professional water testing company providing advanced water quality and water analysis services throughout Brooklyn, Queens, Manhattan, the Bronx, Staten Island, and greater NYC. Our certified and licensed experts perform precise water testing, lead testing, potability testing, bacteria testing, legionella testing, microplastics testing, and PFAS testing for residential, commercial, and institutional properties. Using professional laboratory-grade methods and established analytical standards, our consultant-driven services also include e coli, total coliform, and turbidity evaluations designed to help identify potential water quality concerns. Unlike many water testing companies, our focus is centered on responsive service, accurate reporting, and practical guidance for property owners, management companies, schools, healthcare facilities, and businesses across New York City.

New York

(212) 461-3879

New Jersey

(908) 772-8601

Connecticut

(203) 780-2022









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