Know Your Environment. Protect Your Health.

Cyanide

Meriden Water Division

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.

 

75

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND110ND
2019ND140ND
2020ND110ND
2021ND110ND
2022ND140ND
2023ND140ND

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
2018-07-19CA94411ND
2018-07-19CA94412ND
2018-07-19CA94410ND
2018-07-26CA98740ND
2018-07-26CA98735ND
2018-07-26CA98736ND
2018-07-26CA98737ND
2018-07-26CA98738ND
2018-07-26CA98739ND
2018-08-23CB17441ND
2018-08-23CB17437ND
2019-06-19CD38010ND
2019-06-19CD38011ND
2019-06-19CD38012ND
2019-06-19CD38013ND
2019-06-24CD40812ND
2019-06-26CD42473ND
2019-06-26CD42472ND
2019-06-26CD42471ND
2019-06-26CD42476ND
2019-06-26CD42475ND
2019-06-26CD42474ND
2019-07-03CD50737ND
2019-07-03CD50736ND
2019-07-31CD69099ND
2020-06-10CG10479ND
2020-06-10CG10478ND
2020-06-17CG16088ND
2020-06-17CG16091ND
2020-06-17CG16090ND
2020-06-17CG16089ND
2020-06-17CG16087ND
2020-06-17CG16086ND
2020-06-24CG20610ND
2020-06-24CG20609ND
2020-07-29CG43213ND
2021-06-07CI45714ND
2021-06-07CI45718ND
2021-06-07CI45717ND
2021-06-07CI45715ND
2021-06-07CI45713ND
2021-06-07CI45716ND
2021-06-09CI51091ND
2021-06-09CI51092ND
2021-06-09CI51093ND
2021-06-09CI51094ND
2021-08-25CJ13501ND
2022-05-25CL38209ND
2022-05-25CL38208ND
2022-06-01CL45778ND
2022-06-01CL45777ND
2022-06-01CL45776ND
2022-06-01CL45775ND
2022-06-01CL45779ND
2022-06-01CL45771ND
2022-06-01CL45770ND
2022-06-01CL45769ND
2022-06-01CL45774ND
2022-10-26CM70801ND
2022-10-26CM70802ND
2022-11-09CM80568ND
2023-01-30CN32219ND
2023-01-30CN32220ND
2023-03-08CN55433ND
2023-03-08CN55431ND
2023-03-13CN58724ND
2023-03-13CN58725ND
2023-03-15CN60227ND
2023-03-15CN60228ND
2023-03-15CN60223ND
2023-03-15CN60221ND
2023-03-15CN60222ND
2023-03-22CN65582ND
2023-03-22CN65581ND
2023-07-17CO51914ND