Cyanide
Yonkers City
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 4 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 4 | 0 | ND |
2017 | ND | 4 | 0 | ND |
2018 | ND | 4 | 0 | ND |
2019 | ND | 4 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 150 ppb
The EWG Health Guideline of 150 ppb for cyanide 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.
EPA Maximum Contaminant
Level (MCL) 200 ppb
The legal limit for cyanide, established in 1992, was based on a 1955 toxicity study conducted in laboratory animals. This limit does not include any additional consideration of children’s health.
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2014-03-20 | 14-4421 INP | ND |
2014-03-20 | 14-4423 INP | ND |
2014-03-20 | 14-2242 INP | ND |
2014-03-20 | 14-4422 INP | ND |
2016-06-22 | 16-8292 INP | ND |
2016-06-22 | 16-8293 INP | ND |
2016-06-22 | 16-8291 INP | ND |
2016-06-27 | 16-8485 INP | ND |
2017-03-07 | 17-2254-INP | ND |
2017-03-07 | 17-2237-INP | ND |
2017-03-07 | 17-2256-INP | ND |
2017-03-07 | 17-2255-INP | ND |
2018-05-15 | 18-5024-INP | ND |
2018-05-15 | 18-5027-INP | ND |
2018-05-15 | 18-5003-INP | ND |
2018-05-29 | 18-5551-INP | ND |
2019-05-16 | 19-5076 INP | ND |
2019-05-16 | 19-5074 INP | ND |
2019-05-16 | 19-5075 INP | ND |
2019-05-16 | 19-5073 INP | ND |