Know Your Environment. Protect Your Health.

Cyanide

Nashville, Town of

NOTE: Nashville, Town of purchases water from City of Rocky Mount which is required to test for cyanide. Sample information shown below was taken by City of Rocky Mount.

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND10ND
2021ND20ND
2022ND20ND
2023ND20ND

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

NOTE: Nashville, Town of purchases water from City of Rocky Mount which is required to test for cyanide. Sample information shown below was taken by City of Rocky Mount.

Date Lab ID Result
2018-06-141111-18ND
2018-07-181303-18ND
2019-06-1192432616001_12710ND
2019-08-1292441223001_12710ND
2020-07-218146-072120-E01IND
2020-07-218146-072120-E02IND
2021-04-068146-040621-E01IND
2021-04-208146-042021-E02IND
2022-05-108146-051022-E02IND
2022-06-028146-060222-E01IND
2023-04-108146-041023-E02IND
2023-06-148146-061423-E01IND