Water Quality Report · Updated May 12, 2026
HEMPSTEAD (V)
HEMPSTEAD (V) delivers tap water graded D (62/100) by TapWaterSafety.org. The utility serves approximately 56,000 residents in HEMPSTEAD (V), New York using groundwater. The most significant water quality concerns are: PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Radium, combined (-226 and -228) significantly above health guideline. For questions, the utility can be reached at 516-478-6252.
Is HEMPSTEAD (V) tap water safe to drink?
HEMPSTEAD (V) delivers tap water that earns a grade of D (62/100) from TapWaterSafety.org — a below-average rating, with multiple concerns including pfas contamination.
The utility serves 56,000 residents in HEMPSTEAD (V), drawing from groundwater.
Public testing data identifies 10 contaminants in this water above EWG's health-based guidelines, including: Perfluorohexane sulfonate (PFHXS), Radium, combined (-226 and -228), 1,4-Dioxane, Haloacetic acids (HAA9), Perfluorononanoic acid (PFNA), Chromium (hexavalent), Uranium, Nitrate and nitrite, Nitrate, Perfluorooctanoic acid (PFOA). 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.
Quick actions for HEMPSTEAD (V) residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for HEMPSTEAD (V).
PFAS contamination
Severe concernPerfluorononanoic acid (PFNA), Perfluorooctane sulfonate (PFOS) 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 0.047 ppt, 47x above the EWG health guideline of 0.001 ppt.
Radium, combined (-226 and -228) significantly above health guideline
Moderate concernRadium, combined (-226 and -228) detected at 1.39 pCi/L, 28x above the EWG health guideline of 0.05 pCi/L.
Contact HEMPSTEAD (V)
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 (V)
Filters matched to the specific contaminants in this water supply.
Reverse Osmosis or NSF P473 certified carbon
$80-$750Activated carbon and RO are the only technologies proven to remove PFAS at certified levels.
Reverse Osmosis or water softener
$249-$750RO removes radium effectively; ion-exchange water softeners also reduce radium concentration.
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 62/100 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 |
0.047 ppt | 0.001 | 10.0 | — | — | — | — | 47× over |
| Radium, combined (-226 and -228) Radiological |
1.39 pCi/L | 0.05 | 5.0 | — | — | — | — | 28× over |
| 1,4-Dioxane Semi-volatile organic compound |
2.81 ppb | 0.35 | — | — | 50 | 1 | — | 8.0× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
0.43 ppb | 0.06 | — | — | — | — | — | 7.2× over |
| Perfluorononanoic acid (PFNA) PFAS |
0.033 ppt | 0.006 | 10.0 | — | — | — | — | 5.5× over |
| Chromium (hexavalent) Heavy metal |
0.0945 ppb | 0.02 | — | — | — | — | — | 4.7× over |
| Uranium Radiological |
1.76 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 4.1× over |
| Nitrate and nitrite Inorganic |
0.193 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 1.4× over |
| Nitrate Inorganic |
0.192 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 1.4× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.1 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 1.1× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.168 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | Below guideline |
| Chlorate Disinfection byproduct |
105.0 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
0.0242 ppb | 0.15 | 80.0 | 100 | — | — | — | Below guideline |
| Dibromochloromethane Disinfection byproduct |
0.0155 ppb | 0.1 | — | — | — | — | — | Below guideline |
| Bromodichloromethane Disinfection byproduct |
0.00342 ppb | 0.06 | — | — | — | — | — | Below guideline |
| Bromoform Disinfection byproduct |
0.00513 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
4.99 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Cobalt Other |
0.363 ppb | 70.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.214 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.4 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0204 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.335 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.
HEMPSTEAD (V) service area
This water system serves 1 community in Nassau County, New York. Click any city for its dedicated tap water quality page.
Find the right filter for HEMPSTEAD (V) water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.