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EWG's Tap Water Database — 2019 UPDATE

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Cyanide (free)

Status: No national drinking water standard exists

 

Cyanide is a toxic chemical that causes central nervous system and thyroid toxicity. Water contamination is generally the result of metal mining and chemical industry waste, runoff from agriculture and road salts used for melting ice.

2015-2017:

FOUND
FOUND ABOVE HEALTH GUIDELINES

2

states detected

47

utilities detected

2.4 million

people served

0

states over health guideline

0

utilities over health guideline

0

people served over health guideline

Health concerns for cyanide (free)

Harm to the brain and nervous system

Harm to the thyroid

Harm to the central nervous system

State and national drinking water standards and health guidelines

EWG Health Guideline 150 ppb

The EWG Health Guideline of 150 ppb for cyanide (free) was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to the brain and nervous system.

ppb = parts per billion

States reporting cyanide (free) in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
Pennsylvania462,302,834
Massachusetts151,836
MORE
LESS

Filtering technologies that reduce cyanide (free)

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Reverse Osmosis

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Ion Exchange

Utilities with the highest amounts of cyanide (free), 2015-2017

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Hillview EstatesGreensburg, PA1 of 110.00 ppb50
Peabody Water Department (MWRA)Peabody, MA7 of 188.48 ppb51,836
Conneautville Borough Water DepartmentConneautville, PA1 of 18.00 ppb1,040
Country Crest Mobile Home ParkDillsburg, PA1 of 18.00 ppb150
Pittsburgh Water & Sewer Authority*Pittsburgh, PA1 of 67.50 ppb225,000
Reserve Township Water DepartmentPittsburgh, PA1 of 67.50 ppb3,683
Fox Chapel Authority*Pittsburgh, PA1 of 67.50 ppb18,500
Moon Twp Municipal Authority*Coraopolis, PA2 of 36.33 ppb38,000
Mitchell Lake Mobile Home ParkCambridge Springs, PA1 of 16.00 ppb100
Philadelphia Water Department*Philadelphia, PA3 of 126.00 ppb1,600,000
Reynoldsville Water AuthorityReynoldsville, PA2 of 34.67 ppb2,908
Fredericksburg Water AuthorityFredericksburg, PA1 of 24.50 ppb1,200
Emporium Water CompanyEmporium, PA1 of 33.93 ppb3,300
Shillington Municipal AuthorityShillington, PA1 of 33.67 ppb11,709
Wyomissing Borough Water SystemWyomissing, PA1 of 33.67 ppb8,500
West Reading Borough WaterWest Reading, PA1 of 33.67 ppb4,300
Western Berks Water Authority*Sinking Spring, PA1 of 33.67 ppb0
Regency Woods Mobile Home ParkCarlisle, PA1 of 23.50 ppb450
Tarentum Borough Water Department*Tarentum, PA2 of 32.67 ppb4,530
Brook Haven AcresChambersburg, PA1 of 22.50 ppb75
Municipal Authority of Washington TownshipBelle Vernon, PA2 of 32.33 ppb9,100
N Middleton Water AuthorityCarlisle, PA1 of 32.00 ppb9,483
Lykens Borough AuthorityLykens, PA1 of 42.00 ppb3,225
Masontown Municipal Water WorksMasontown, PA1 of 32.00 ppb3,700
Mount Morris Water & Sewage AuthorityMt Morris, PA1 of 32.00 ppb1,500
Southwestern Pennsylvania Water Authority*Jefferson, PA1 of 32.00 ppb40,000
Marianna Municipal Water WorksMarianna, PA1 of 32.00 ppb450
New Kensington Municipal AuthorityNew Kensington, PA1 of 32.00 ppb47,800
Dtma Cedar Crest FarmsDoylestown, PA2 of 121.67 ppb300
Northampton Boro Municipal Authority*Northampton, PA1 of 31.67 ppb40,000
Village of Neshaminy FallsNorth Wales, PA2 of 121.67 ppb1,300
North Wales Water Authority*North Wales, PA2 of 121.67 ppb68,656
Zelienople BoroughZelienople, PA1 of 51.60 ppb4,123
Borough of ConwayConway, PA1 of 51.60 ppb2,290
Beaver Falls Municipal Authority*Beaver Falls, PA1 of 51.60 ppb50,000
Highridge Water AuthorityBlairsville, PA1 of 61.17 ppb12,000
Washington Township Municipal AuthorityWaynesboro, PA1 of 51.000 ppb5,607
Jefferson Township AuthorityFayette City, PA1 of 40.450 ppb1,250
Newell Municipal Authority*Newell, PA1 of 40.450 ppb520
Maplewood Mobile Home ParkMorgantown, PA1 of 10.1000 ppb70

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report Cyanide (free), but it likely has the contaminant in its water supply.

UtilityLocationTestsAverage levelPeople served
Peabody Water Department (MWRA)Peabody, MA7 of 188.48 ppb51,836
Pittsburgh Water & Sewer Authority*Pittsburgh, PA1 of 67.50 ppb225,000
Fox Chapel Authority*Pittsburgh, PA1 of 67.50 ppb18,500
Moon Twp Municipal Authority*Coraopolis, PA2 of 36.33 ppb38,000
Philadelphia Water Department*Philadelphia, PA3 of 126.00 ppb1,600,000
Shillington Municipal AuthorityShillington, PA1 of 33.67 ppb11,709
Southwestern Pennsylvania Water Authority*Jefferson, PA1 of 32.00 ppb40,000
New Kensington Municipal AuthorityNew Kensington, PA1 of 32.00 ppb47,800
North Wales Water Authority*North Wales, PA2 of 121.67 ppb68,656
Northampton Boro Municipal Authority*Northampton, PA1 of 31.67 ppb40,000
Beaver Falls Municipal Authority*Beaver Falls, PA1 of 51.60 ppb50,000
Highridge Water AuthorityBlairsville, PA1 of 61.17 ppb12,000

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report Cyanide (free), but it likely has the contaminant in its water supply.