Water Quality Report · Updated May 12, 2026
TOWN OF HEMPSTEAD WATER DEPARTMENT
TOWN OF HEMPSTEAD WATER DEPARTMENT delivers tap water graded C (68/100) by TapWaterSafety.org. The utility serves approximately 110,000 residents in HEMPSTEAD (T), New York using groundwater. The most significant water quality concerns are: PFAS contamination; Nitrate significantly above health guideline; Nitrate and nitrite significantly above health guideline; Chromium (hexavalent) significantly above health guideline. For questions, the utility can be reached at 516-794-8300.
Is HEMPSTEAD (T) tap water safe to drink?
TOWN OF HEMPSTEAD WATER DEPARTMENT delivers tap water that earns a grade of C (68/100) from TapWaterSafety.org — an average rating, with several contaminants above health guidelines but generally compliant with US legal limits.
The utility serves 110,000 residents in HEMPSTEAD (T), drawing from groundwater.
Public testing data identifies 10 contaminants in this water above EWG's health-based guidelines, including: Nitrate, Nitrate and nitrite, Chromium (hexavalent), Radium, combined (-226 and -228), Tetrachloroethylene (perchloroethylene), Total trihalomethanes (TTHMs), 1,4-Dioxane, Uranium, Dibromochloromethane, Bromodichloromethane. 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 (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 TOWN OF HEMPSTEAD WATER DEPARTMENT.
PFAS contamination
Severe concernPerfluorooctane sulfonate (PFOS), Perfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Nitrate significantly above health guideline
Moderate concernNitrate detected at 2.98 ppm, 21x above the EWG health guideline of 0.14 ppm.
Nitrate and nitrite significantly above health guideline
Moderate concernNitrate and nitrite detected at 2.95 ppm, 21x above the EWG health guideline of 0.14 ppm.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 0.289 ppb, 14x above the EWG health guideline of 0.02 ppb.
Contact TOWN OF HEMPSTEAD WATER DEPARTMENT
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.
Reverse Osmosis or NSF P473 certified carbon
$80-$750Activated carbon and RO are the only technologies proven to remove PFAS at certified levels.
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 68/100 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 |
|---|---|---|---|---|---|---|---|---|
| Nitrate Inorganic |
2.98 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 21× over |
| Nitrate and nitrite Inorganic |
2.95 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 21× over |
| Chromium (hexavalent) Heavy metal |
0.289 ppb | 0.02 | — | — | — | — | — | 14× over |
| Radium, combined (-226 and -228) Radiological |
0.2 pCi/L | 0.05 | 5.0 | — | — | — | — | 4.0× over |
| Tetrachloroethylene (perchloroethylene) Volatile organic compound |
0.177 ppb | 0.06 | 5.0 | — | — | — | — | 3.0× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
0.443 ppb | 0.15 | 80.0 | 100 | — | — | — | 3.0× over |
| 1,4-Dioxane Semi-volatile organic compound |
0.77 ppb | 0.35 | — | — | 50 | 1 | — | 2.2× over |
| Uranium Radiological |
0.9 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 2.1× over |
| Dibromochloromethane Disinfection byproduct |
0.163 ppb | 0.1 | — | — | — | — | — | 1.6× over |
| Bromodichloromethane Disinfection byproduct |
0.0798 ppb | 0.06 | — | — | — | — | — | 1.3× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.089 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | Below guideline |
| Haloacetic acids (HAA9) Disinfection byproduct |
0.0367 ppb | 0.06 | — | — | — | — | — | Below guideline |
| Trichloroethylene Volatile organic compound |
0.236 ppb | 0.4 | 5.0 | 10 | 20 | 1.7 | — | Below guideline |
| Perchlorate Disinfection byproduct |
0.424 ppb | 1.0 | — | — | — | — | — | Below guideline |
| Chloroform Disinfection byproduct |
0.16 ppb | 0.4 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
82.3 ppb | 210.0 | — | — | — | — | — | Below guideline |
| 1,2,3-Trichloropropane Other |
0.000223 ppb | 0.0007 | — | — | — | — | — | Below guideline |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.089 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | Below guideline |
| Bromoform Disinfection byproduct |
0.139 ppb | 0.5 | — | — | — | — | — | Below guideline |
| 1,1-Dichloroethane Volatile organic compound |
0.369 ppb | 3.0 | — | — | — | — | — | Below guideline |
| Bromochloromethane Other |
0.00399 ppb | 0.06 | — | — | — | — | — | Below guideline |
| Cobalt Other |
1.86 ppb | 70.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
1.88 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Barium Heavy metal |
5.86 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Vanadium Other |
0.0122 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0337 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| 1,1-Dichloroethylene Volatile organic compound |
0.0891 ppb | — | 7.0 | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.072 ppb | — | — | — | — | — | — | Below guideline |
| cis-1,2-Dichloroethylene Volatile organic compound |
0.0621 ppb | — | 70.0 | — | — | — | — | Below guideline |
| Nitrite Inorganic |
0.000365 ppm | — | 1.0 | — | — | — | — | 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.
TOWN OF HEMPSTEAD WATER DEPARTMENT 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 (T) water
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