Cyanide

City of Newport

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	8	ND
2015	ND	8	ND
2016	ND	8	ND
2017	ND	11	ND
2018	ND	20	ND
2019	ND	22	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
2014-01-06	1401012-03_WL11	ND
2014-01-06	1401012-08_WL11	ND
2014-05-21	1402793-06_WL11	ND
2014-05-21	1402793-05_WL11	ND
2014-07-02	1403537-01_WL11	ND
2014-07-02	1403537-05_WL11	ND
2014-07-02	1403537-04_WL11	ND
2014-07-02	1403537-03_WL11	ND
2015-01-12	1501069-03_WL11	ND
2015-01-12	1501069-08_WL11	ND
2015-06-01	1502384-02_WL11	ND
2015-06-01	1502384-01_WL11	ND
2015-07-20	1503232-04_WL11	ND
2015-07-20	1503232-06_WL11	ND
2015-07-20	1503232-05_WL11	ND
2015-07-20	1503232-03_WL11	ND
2016-01-11	1600887-08_WL11	ND
2016-01-11	1600887-02_WL11	ND
2016-05-09	1602070-04_WL11	ND
2016-05-09	1602070-05_WL11	ND
2016-07-25	1603626-02_WL11	ND
2016-07-25	1603626-04_WL11	ND
2016-07-25	1603626-03_WL11	ND
2016-07-25	1603626-01_WL11	ND
2017-01-24	1701020-02_WL11	ND
2017-01-25	1701027-06_WL11	ND
2017-05-15	1702185-01_WL11	ND
2017-05-15	1702185-02_WL11	ND
2017-05-15	1702185-03_WL11	ND
2017-07-10	1703108-03_WL11	ND
2017-07-10	1703108-02_WL11	ND
2017-07-10	1703108-01_WL11	ND
2017-07-10	1703108-04_WL11	ND
2017-11-14	1704991-01_WL11	ND
2017-11-20	1705061-04_WL11	ND
2018-01-16	1800888-01_WL11	ND
2018-01-16	1800888-02_WL11	ND
2018-01-22	1800936-01_WL11	ND
2018-01-22	1800936-02_WL11	ND
2018-01-22	1800936-07_WL11	ND
2018-06-04	1802314-01_WL11	ND
2018-06-04	1802314-06_WL11	ND
2018-06-04	1802314-02_WL11	ND
2018-06-04	1802314-04_WL11	ND
2018-06-04	1802314-05_WL11	ND
2018-07-17	1803078-03_WL11	ND
2018-07-17	1803078-02_WL11	ND
2018-07-17	1803078-04_WL11	ND
2018-07-17	1803078-05_WL11	ND
2018-07-17	1803078-06_WL11	ND
2018-07-17	1803078-07_WL11	ND
2018-07-17	1803078-08_WL11	ND
2018-10-01	1804258-03_WL11	ND
2018-10-01	1804258-02_WL11	ND
2018-10-01	1804258-01_WL11	ND
2019-01-15	1900857-05_WL11	ND
2019-01-15	1900857-11_WL11	ND
2019-01-15	1900857-10_WL11	ND
2019-01-15	1900857-04_WL11	ND
2019-01-15	1900857-06_WL11	ND
2019-01-15	1900857-08_WL11	ND
2019-05-07	1901920-03_WL11	ND
2019-05-07	1901920-02_WL11	ND
2019-05-07	1901920-01_WL11	ND
2019-05-07	1901920-05_WL11	ND
2019-05-07	1901920-07_WL11	ND
2019-05-07	1901920-06_WL11	ND
2019-08-06	1903576-04_WL11	ND
2019-08-06	1903576-02_WL11	ND
2019-08-06	1903576-03_WL11	ND
2019-08-06	1903576-01_WL11	ND
2019-08-06	1903576-05_WL11	ND
2019-08-06	1903576-06_WL11	ND
2019-08-29	1904072-02_WL11	ND
2019-12-05	1905044-01_WL11	ND
2019-12-05	1905044-03_WL11	ND
2019-12-05	1905044-02_WL11	ND