Water Quality Report · Updated May 12, 2026
MOUNT VERNON WATER DEPARTMENT
MOUNT VERNON WATER DEPARTMENT delivers tap water graded C (65/100) by TapWaterSafety.org. The utility serves approximately 73,893 residents in MOUNT VERNON (C), New York using surface water (purchased). The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Trichloroacetic acid significantly above health guideline. For questions, the utility can be reached at 914-665-2360.
Is MOUNT VERNON (C) tap water safe to drink?
MOUNT VERNON WATER DEPARTMENT delivers tap water that earns a grade of C (65/100) from TapWaterSafety.org — an average rating, with several contaminants above health guidelines but generally compliant with US legal limits.
The utility serves 73,893 residents in MOUNT VERNON (C), drawing from surface water (purchased).
Public testing data identifies 10 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Haloacetic acids (HAA5), Trichloroacetic acid, Total trihalomethanes (TTHMs), Chloroform, Dichloroacetic acid, Bromodichloromethane, Bromochloroacetic acid, Radium, combined (-226 and -228), Chromium (hexavalent). 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 MOUNT VERNON (C) residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for MOUNT VERNON WATER DEPARTMENT.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 43.6 ppb, 726x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 38.6 ppb, 386x above the EWG health guideline of 0.1 ppb.
Trichloroacetic acid significantly above health guideline
Moderate concernTrichloroacetic acid detected at 23.9 ppb, 239x above the EWG health guideline of 0.1 ppb.
Contact MOUNT VERNON 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 MOUNT VERNON (C)
Filters matched to the specific contaminants in this water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
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 65/100 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 |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
43.6 ppb | 0.06 | — | — | — | — | — | 726× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
38.6 ppb | 0.1 | 60.0 | 60 | — | — | — | 386× over |
| Trichloroacetic acid Disinfection byproduct |
23.9 ppb | 0.1 | — | — | — | — | — | 239× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
34.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 229× over |
| Chloroform Disinfection byproduct |
30.8 ppb | 0.4 | — | — | — | — | — | 77× over |
| Dichloroacetic acid Disinfection byproduct |
14.4 ppb | 0.2 | — | — | — | — | — | 72× over |
| Bromodichloromethane Disinfection byproduct |
3.5 ppb | 0.06 | — | — | — | — | — | 58× over |
| Bromochloroacetic acid Disinfection byproduct |
0.931 ppb | 0.02 | — | — | — | — | — | 47× over |
| Radium, combined (-226 and -228) Radiological |
0.34 pCi/L | 0.05 | 5.0 | — | — | — | — | 6.7× over |
| Chromium (hexavalent) Heavy metal |
0.0434 ppb | 0.02 | — | — | — | — | — | 2.2× over |
| Nitrate and nitrite Inorganic |
0.0981 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Nitrate Inorganic |
0.0959 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Manganese Heavy metal |
13.9 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Chlorate Disinfection byproduct |
11.4 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
16.1 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Selenium Heavy metal |
0.0556 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.072 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0209 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
0.0556 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Cyanide Inorganic |
1.8 ppb | — | 200.0 | 50 | 70 | 150 | — | Below guideline |
| Dicamba Other |
0.0155 ppb | — | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.586 ppm | — | 4.0 | 1.5 | 1.5 | — | — | 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.
MOUNT VERNON WATER DEPARTMENT service area
This water system serves 1 community in Westchester County, New York. Click any city for its dedicated tap water quality page.
Find the right filter for MOUNT VERNON (C) water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.