Know Your Environment. Protect Your Health.

Cyanide

Manchester Water Department

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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND80ND
2019ND20ND
2020ND80ND
2021ND20ND
2022ND20ND
2023ND80ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-02-05AA82672-IOC1ND
2018-02-05AA82673-IOC1ND
2018-02-05AA82666-IOC1ND
2018-02-06AA82689-IOC1ND
2018-02-06AA82690-IOC1ND
2018-02-07AA82711-IOC1ND
2018-02-07AA82712-IOC1ND
2018-02-23AA82899-IOCRND
2019-05-03AA88242-IOC1ND
2019-05-16AA88408-IOCRND
2020-10-01AA94988-IOCRND
2020-12-07AA95917-IOC1ND
2020-12-07AA95918-IOC1ND
2020-12-08AA95934-IOC1ND
2020-12-08AA95935-IOC1ND
2020-12-09AA95952-IOC1ND
2020-12-09AA95953-IOC1ND
2020-12-10AA95963-IOC1ND
2021-11-04211104-1-06IOCND
2021-11-04211104-1-04RAW IOCND
2022-05-13220513-1-04 RAW IOCND
2022-06-03220603-1-06IOCND
2023-12-04231204-3-01IOCND
2023-12-04231204-3-02 IOCND
2023-12-05231205-1-06 IOCND
2023-12-05231205-3-03 IOCND
2023-12-05231205-3-04 IOCND
2023-12-05231205-1-04 RAW IOCND
2023-12-06231206-3-05 IOCND
2023-12-06231206-3-06 IOCND