Water Quality Report · Updated October 07, 2026
LIBERTY UTILITIES NEW YORK - LYNBROOK
LIBERTY UTILITIES NEW YORK - LYNBROOK delivers tap water graded D (58/100) by TapWaterSafety.org. The utility serves approximately 220,000 residents in HEMPSTEAD (T), New York using groundwater. The most significant water quality concerns are: PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Arsenic significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline. For questions, the utility can be reached at 516-632-2218.
Is HEMPSTEAD (T) tap water safe to drink?
LIBERTY UTILITIES NEW YORK - LYNBROOK delivers tap water that earns a grade of D (58/100) from TapWaterSafety.org — a below-average rating, with multiple concerns including pfas contamination.
The utility serves 220,000 residents in HEMPSTEAD (T) and 1 other community, drawing from groundwater. Despite being legal under US EPA standards, this water would fail the European Union's Drinking Water Directive, primarily due to pfas contamination.
Public testing data identifies 14 contaminants in this water above EWG's health-based guidelines, including: Perfluorohexane sulfonate (PFHXS), Arsenic, Haloacetic acids (HAA9), Radium, combined (-226 and -228), Perfluorononanoic acid (PFNA), Dibromoacetic acid, Haloacetic acids (HAA5), Chromium (hexavalent), Perfluorooctanoic acid (PFOA), Total trihalomethanes (TTHMs), Dibromochloromethane, Trichloroacetic acid, Bromodichloromethane, Tetrachloroethylene (perchloroethylene). For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for LIBERTY UTILITIES NEW YORK - LYNBROOK (system ID NY2902835) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Lead and Copper Rule | Required treatment not met | 07/01/2023 | Open |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for HEMPSTEAD (T) residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for LIBERTY UTILITIES NEW YORK - LYNBROOK.
PFAS contamination
Severe concernPerfluorononanoic acid (PFNA), Perfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 0.43 ppt, 430x above the EWG health guideline of 0.001 ppt.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 0.281 ppb, 70x above the EWG health guideline of 0.004 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 1.48 ppb, 25x above the EWG health guideline of 0.06 ppb.
Contact LIBERTY UTILITIES NEW YORK - LYNBROOK
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for HEMPSTEAD (T)
Filters matched to the specific contaminants in this water supply.
Filter certified for PFOA/PFOS (NSF/ANSI 53 or 58)
$180-$750Reverse osmosis and some carbon block filters reduce PFAS. Look for certification to NSF/ANSI 53 or 58 for PFOA/PFOS.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 58/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.43 ppt | 0.001 | 10.0 | — | — | — | — | 430× over |
| Arsenic Heavy metal |
0.281 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 70× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
1.48 ppb | 0.06 | — | — | — | — | — | 25× over |
| Radium, combined (-226 and -228) Radiological |
0.83 pCi/L | 0.05 | 5.0 | — | — | — | — | 17× over |
| Perfluorononanoic acid (PFNA) PFAS |
0.089 ppt | 0.006 | 10.0 | — | — | — | — | 15× over |
| Dibromoacetic acid Disinfection byproduct |
0.22 ppb | 0.03 | — | — | — | — | — | 7.3× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
0.411 ppb | 0.1 | 60.0 | 60 | — | — | — | 4.1× over |
| Chromium (hexavalent) Heavy metal |
0.0796 ppb | 0.02 | — | — | — | — | — | 4.0× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.245 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 2.7× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
0.285 ppb | 0.15 | 80.0 | 100 | — | — | — | 1.9× over |
| Dibromochloromethane Disinfection byproduct |
0.148 ppb | 0.1 | — | — | — | — | — | 1.5× over |
| Trichloroacetic acid Disinfection byproduct |
0.134 ppb | 0.1 | — | — | — | — | — | 1.3× over |
| Bromodichloromethane Disinfection byproduct |
0.0785 ppb | 0.06 | — | — | — | — | — | 1.3× over |
| Tetrachloroethylene (perchloroethylene) Volatile organic compound |
0.0699 ppb | 0.06 | 5.0 | — | — | — | — | 1.2× over |
| Manganese Heavy metal |
68.6 ppb | 100.0 | — | 50 | 80 | — | — | Fails EU |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.184 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | Below guideline |
| Chlorate Disinfection byproduct |
68.1 ppb | 210.0 | — | — | — | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.0485 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Bromoform Disinfection byproduct |
0.0669 ppb | 0.5 | — | — | — | — | — | Below guideline |
| 6:2 Fluorotelomer sulfonate (6 2FTS) Other |
0.104 ppt | 1.0 | — | — | — | — | — | Below guideline |
| Chloroform Disinfection byproduct |
0.0318 ppb | 0.4 | — | — | — | — | — | Below guideline |
| Perchlorate Disinfection byproduct |
0.0737 ppb | 1.0 | — | — | — | — | — | Below guideline |
| Uranium Radiological |
0.02 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | Below guideline |
| Thallium Heavy metal |
0.004 ppb | 0.1 | 2.0 | — | — | — | — | Below guideline |
| Cobalt Other |
1.83 ppb | 70.0 | — | — | — | — | — | Below guideline |
| MTBE Volatile organic compound |
0.217 ppb | 13.0 | — | — | — | — | — | Below guideline |
| Nitrate and nitrite Inorganic |
0.00205 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Barium Heavy metal |
6.44 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Beryllium Heavy metal |
0.0085 ppb | 1.0 | 4.0 | — | — | 1 | — | Below guideline |
| Vanadium Other |
0.166 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Nitrate Inorganic |
0.00105 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Chloromethane Other |
0.0155 ppb | 2.69 | — | — | — | — | — | Below guideline |
| Perfluoropentane sulfonic acid (PFPeS) PFAS |
0.005 ppt | 1.0 | — | — | — | — | — | Below guideline |
| Mercury (inorganic) Heavy metal |
0.00135 ppb | 1.2 | 2.0 | 1 | 6 | 1.2 | — | Below guideline |
| Selenium Heavy metal |
0.0118 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.297 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.219 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
0.168 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.041 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0137 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.007 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Bromomethane Other |
0.000197 ppb | — | — | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.0271 ppb | — | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
0.0438 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Cyanide Inorganic |
1.65 ppb | — | 200.0 | 50 | 70 | 150 | — | Below guideline |
| Dacthal Other |
1.2 ppb | — | — | — | — | — | — | Below guideline |
| Dalapon Pesticide/Herbicide |
0.0461 ppb | — | 200.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.0148 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.0192 ppb | — | — | — | — | — | — | Below guideline |
| Lithium Other |
0.438 ppb | — | — | — | — | — | — | Below guideline |
| Nonafluoro-3,6-dioxaheptanoic acid Other |
2.6e-05 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
LIBERTY UTILITIES NEW YORK - LYNBROOK service area
This water system serves 2 communities in Nassau County, New York. Click any city for its dedicated tap water quality page.
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