What contaminants are in MOUNT VERNON (C) tap water?

Public data sources identify the following contaminants in MOUNT VERNON (C)'s water supply: Haloacetic acids (HAA9), Haloacetic acids (HAA5), Trichloroacetic acid, Total trihalomethanes (TTHMs), Chloroform, Dichloroacetic acid, Bromodichloromethane, Bromochloroacetic acid, Radium, combined (-226 and -228), Chromium (hexavalent), Nitrate and nitrite, Nitrate, Manganese, Chlorate, Barium, Selenium, Monochloroacetic acid, Strontium, Chromium (total), Cyanide, Dicamba, Fluoride. Levels and comparison to EWG health guidelines are listed on the full city page.

Which water utility serves MOUNT VERNON (C)?

MOUNT VERNON (C) is served by MOUNT VERNON WATER DEPARTMENT. MOUNT VERNON WATER DEPARTMENT serves approximately 73,893 residents.

Tap Water Quality Report

Tap water quality in MOUNT VERNON (C), New York

Q: Is the tap water in MOUNT VERNON (C), New York safe to drink?

MOUNT VERNON (C)'s tap water receives a grade of D (65/100) from TapWaterSafety.org. 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. Grades are based on EPA SDWIS, EPA ECHO, EWG Tap Water Database, and the utility's published Consumer Confidence Report.

Served by MOUNT VERNON WATER DEPARTMENT. 73,893 residents.

Average score 65/100

Utilities 1

Population 73,893

65/100

Below Average

ⓘ How did we get this rating?

Quick answer

Tap water in MOUNT VERNON (C), New York receives a grade of D (65/100) 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.

Data sources for this grade: utilities.csv EWG Tap Water Database ⓘ How did we get this rating?

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 concern

Haloacetic 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 concern

Haloacetic acids (HAA5) detected at 38.6 ppb, 386x above the EWG health guideline of 0.1 ppb.

Trichloroacetic acid significantly above health guideline

Moderate concern

Trichloroacetic acid detected at 23.9 ppb, 239x above the EWG health guideline of 0.1 ppb.

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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.