Cyanide

Oyster Point S/d

NOTE: Oyster Point S/d purchases water from Cape Fear Public Utility Authority - New Hanover County which is required to test for cyanide. Sample information shown below was taken by Cape Fear Public Utility Authority - New Hanover County.

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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	1	ND
2015	ND	2	ND
2016	ND	1	ND
2017	ND	1	ND
2018	ND	2	ND
2019	ND	2	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
2014-03-13	92193372001IN	ND
2015-09-29		ND
2015-12-08		ND
2016-10-18	3567516	ND
2017-03-09	3651870	ND
2018-09-05	4046846	ND
2018-12-04	4140209	ND
2019-01-02	4163044	ND
2019-09-12	4419217	ND