Tap Water Quality Report
Tap water quality in MOUNT VERNON (C), New York
Tap water in MOUNT VERNON (C), New York receives a grade of C (75/100) from TapWaterSafety.org. It's served by MOUNT VERNON WATER DEPARTMENT. 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. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in MOUNT VERNON (C)'s tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving MOUNT VERNON (C).
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.
EPA compliance record
Official U.S. EPA records for MOUNT VERNON WATER DEPARTMENT (system ID NY5903441) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for MOUNT VERNON (C)
Filters matched to the specific contaminants in MOUNT VERNON (C)'s water supply.
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.
All contaminants detected in MOUNT VERNON (C)'s tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. 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, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from MOUNT VERNON WATER DEPARTMENT.