New York · drinking water · SDWIS through latest publish

Liberty Utilities New York - Lynbrook Water Quality — Merrick, New York

PWSID NY2902835 · GroundwaterPrivate

220,000 people served. 7 health-based SDWIS violations recorded in the past 5 years. 23 remain unresolved. Last cited 2 years ago.

ALL SDWIS VIOLATIONS · 20222026 (annual count)
Bar chart of annual values from 2022 to 2026, in violations. Most recent year (2026): 0 violations.35 violations'22'23'24'25'260 violations
Anomaly engine

Active signals

UNRESOLVED VIOLATION · SDWIS VIOLATION

Thallium

Unresolved Lead and Copper Rule violation cited in 2024 (thallium).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 1064

Unresolved Lead and Copper Rule violation cited in 2024 (contaminant 1064).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 1925

Unresolved Lead and Copper Rule violation cited in 2024 (contaminant 1925).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 1929

Unresolved Lead and Copper Rule violation cited in 2024 (contaminant 1929).

EPA SDWIS record

Most-cited contaminants

What This Utility Gets Cited For

  • Thallium7 citations
  • Contaminant 10647 citations
  • Contaminant 19257 citations
  • Contaminant 19297 citations
  • Contaminant 19967 citations
  • Contaminant 10197 citations
Violation history

What's On The SDWIS Record

Health-based violations exceed an MCL or treatment-technique standard. Monitoring violations are reporting failures with no measured exceedance — they tell you the system isn't fully transparent, not that the water is unsafe today.

MONITORING · THALLIUM

2024 · Thallium · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1044

MONITORING · THALLIUMUNRESOLVED

2024 · Thallium · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1044

MONITORING · CONTAMINANT 1064

2024 · Contaminant 1064 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1064

MONITORING · CONTAMINANT 1064UNRESOLVED

2024 · Contaminant 1064 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1064

MONITORING · CONTAMINANT 1925

2024 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 1925UNRESOLVED

2024 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 1929

2024 · Contaminant 1929 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1929

MONITORING · CONTAMINANT 1929UNRESOLVED

2024 · Contaminant 1929 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1929

MONITORING · CONTAMINANT 1996

2024 · Contaminant 1996 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1996

MONITORING · CONTAMINANT 1996UNRESOLVED

2024 · Contaminant 1996 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1996

MONITORING · CONTAMINANT 1019

2024 · Contaminant 1019 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1019

MONITORING · CONTAMINANT 1019UNRESOLVED

2024 · Contaminant 1019 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1019

MONITORING · THALLIUM

2024 · Thallium · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1044

MONITORING · THALLIUMUNRESOLVED

2024 · Thallium · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1044

MONITORING · THALLIUM

2024 · Thallium · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1044

MONITORING · CONTAMINANT 1064

2024 · Contaminant 1064 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1064

MONITORING · CONTAMINANT 1064UNRESOLVED

2024 · Contaminant 1064 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1064

MONITORING · CONTAMINANT 1064

2024 · Contaminant 1064 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1064

MONITORING · CONTAMINANT 1925

2024 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 1925UNRESOLVED

2024 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 1925

2024 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 1929

2024 · Contaminant 1929 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1929

MONITORING · CONTAMINANT 1929UNRESOLVED

2024 · Contaminant 1929 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1929

MONITORING · CONTAMINANT 1929

2024 · Contaminant 1929 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1929

MONITORING · CONTAMINANT 1996

2024 · Contaminant 1996 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1996

MONITORING · CONTAMINANT 1996UNRESOLVED

2024 · Contaminant 1996 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1996

MONITORING · CONTAMINANT 1996

2024 · Contaminant 1996 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1996

MONITORING · CONTAMINANT 1019

2024 · Contaminant 1019 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1019

MONITORING · CONTAMINANT 1019UNRESOLVED

2024 · Contaminant 1019 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1019

MONITORING · CONTAMINANT 1019

2024 · Contaminant 1019 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1019

HEALTH-BASED · CONTAMINANT 5000

2024 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Treatment technique violation; returned to compliance

CONTAMINANT CODE 5000

HEALTH-BASED · CONTAMINANT 5000UNRESOLVED

2024 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Treatment technique violation

CONTAMINANT CODE 5000

HEALTH-BASED · CONTAMINANT 5000

2024 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Treatment technique violation; returned to compliance

CONTAMINANT CODE 5000

HEALTH-BASED · CONTAMINANT 5000UNRESOLVED

2024 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Treatment technique violation

CONTAMINANT CODE 5000

HEALTH-BASED · CONTAMINANT 5000

2024 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Treatment technique violation; returned to compliance

CONTAMINANT CODE 5000

MONITORING · THALLIUMUNRESOLVED

2023 · Thallium · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1044

MONITORING · THALLIUM

2023 · Thallium · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1044

MONITORING · CONTAMINANT 1064UNRESOLVED

2023 · Contaminant 1064 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1064

MONITORING · CONTAMINANT 1064

2023 · Contaminant 1064 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1064

MONITORING · CONTAMINANT 1925UNRESOLVED

2023 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 1925

2023 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 1929UNRESOLVED

2023 · Contaminant 1929 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1929

MONITORING · CONTAMINANT 1929

2023 · Contaminant 1929 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1929

MONITORING · CONTAMINANT 1996UNRESOLVED

2023 · Contaminant 1996 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1996

MONITORING · CONTAMINANT 1996

2023 · Contaminant 1996 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1996

MONITORING · CONTAMINANT 1019UNRESOLVED

2023 · Contaminant 1019 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1019

MONITORING · CONTAMINANT 1019

2023 · Contaminant 1019 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1019

HEALTH-BASED · CONTAMINANT 5000UNRESOLVED

2023 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Treatment technique violation

CONTAMINANT CODE 5000

HEALTH-BASED · CONTAMINANT 5000

2023 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Treatment technique violation; returned to compliance

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 2099UNRESOLVED

2022 · Contaminant 2099 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2099

MONITORING · CONTAMINANT 2099UNRESOLVED

2022 · Contaminant 2099 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2099

MONITORING · CONTAMINANT 2099

2022 · Contaminant 2099 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2099

Equity context · ACS 2018-2022 · USEPA-clone EJ disparity

Who Drinks This Water

Merrick, New York (Census place; block-group disparity scores aggregated by centroid containment): a service population of 21,004. Local disparity score for pm2.5 (fine particulate) sits well below the reference (9). Why we surface this →

POPULATION SHARE
1.6%

Low-income

POPULATION SHARE
17.2%

People of color

POPULATION SHARE
8.0%

Under age 5

POPULATION SHARE
17.5%

Over age 64

NATIONAL PERCENTILE · vs all US block groups (population-weighted; ranked against the national EJScreen indicator distribution)

  • PM2.5 (fine particulate)Health riskFine inhalable particles 2.5 micrometers or smaller. They travel deep into the lungs and into the bloodstream — linked to asthma, heart disease, stroke, and premature death.18below the national median
  • OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.78above the national median
  • Nitrogen dioxide (NO₂)Health riskA tailpipe and combustion gas. Concentrates near busy roads and industrial sites; raises risk of airway inflammation, asthma, and lower respiratory infections in children.53near the national median
  • Diesel particulateHealth riskSoot from diesel engines (trucks, trains, ports, construction). EPA classifies it as a likely human carcinogen and a major driver of childhood asthma near freight corridors.74above the national median
  • Toxic releases (RSEI)Health riskEPA's Risk-Screening Environmental Indicators score — weights TRI chemical releases by toxicity, where they go, and how many people are nearby. Higher means greater modeled cancer and chronic-health risk.19below the national median
  • Traffic proximityHealth riskPopulation-weighted distance to high-volume roads. Living close to heavy traffic raises exposure to PM2.5, NO₂, and diesel exhaust — and the cardiovascular and asthma risks that follow.76above the national median
  • Lead-paint risk (pre-1960 housing)Health riskShare of housing built before 1960, when lead-based paint was common. Dust from deteriorating paint is the leading cause of childhood lead poisoning, which permanently impairs cognitive development.85in the highest 20% nationally
  • Superfund site proximityHealth riskPopulation-weighted distance to NPL Superfund sites — the most contaminated waste sites in the country. Nearby groundwater, soil, and air can carry industrial solvents, metals, and other long-lived contaminants.84in the highest 20% nationally
  • RMP-facility proximityHealth riskDistance to facilities holding chemicals at quantities large enough to require an EPA Risk Management Plan (refineries, fertilizer plants, etc.). These pose acute exposure risk during accidental releases.28below the national median
  • Hazardous-waste site proximityHealth riskDistance to RCRA hazardous-waste handlers (treatment, storage, disposal facilities). Indicates potential exposure to industrial chemicals in air, soil, and groundwater.56near the national median
  • Underground storage tanksHealth riskDensity of underground tanks (gasoline, heating oil, industrial fluids). Leaking tanks are a leading source of benzene and other volatile organic compounds in groundwater drinking-water supplies.31below the national median
  • NPDES wastewater proximityHealth riskDistance to permitted industrial wastewater dischargers. Closer proximity raises exposure to pollutants released into surface waters used for fishing, recreation, and downstream drinking-water intakes.74above the national median
  • Drinking-water non-complianceHealth riskEPA score for public water systems with health-based Safe Drinking Water Act violations. Higher means more residents on systems that recently exceeded safe limits for contaminants like lead, arsenic, or nitrate.76above the national median
EJ disparity scores · service-area block groups (100 = national reference; higher = greater disparate burden)
IndicatorDisparity scoreReading
PM2.5 (fine particulate)9well below the reference
Ozone36well below the reference
Nitrogen dioxide (NO₂)27well below the reference
Diesel particulate36well below the reference
Toxic releases (RSEI)9well below the reference
Traffic proximity36well below the reference
Lead-paint risk (pre-1960 housing)39well below the reference
Superfund site proximity40well below the reference
RMP-facility proximity0well below the reference
Hazardous-waste site proximity27well below the reference
Underground storage tanks0well below the reference
NPDES wastewater proximity35well below the reference
Drinking-water non-compliance0well below the reference

Source: Census ACS 2018-2022 (5-year) + USEPA-clone EJ blockgroup stats (raw indicators + EJ disparity mirror).

Source. EPA Safe Drinking Water Information System · retrieved 2026-05-07. Reporting period 2022-01-012026-05-07.

What this is not. SDWIS records compliance against federal MCLs — not a direct readout of tap-water concentrations. Active health-based violations are not the same as a current crisis; we link to the EPA record so you can verify return-to-compliance status before forming a conclusion.