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EWG's Tap Water Database — 2021 UPDATE

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Cyanide

Long Beach 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.

MORE ABOUT THIS CONTAMINANT

 

53

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016ND280ND
2017N/A00N/A
2018N/A00N/A
2019ND250ND

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
2016-05-059590-040-0836ND
2016-08-039590-001-0853ND
2016-08-039590-043-0847ND
2016-08-039590-038-1243ND
2016-08-039590-035-1157ND
2016-08-039590-033-1059ND
2016-08-039590-030-1006ND
2016-08-039590-002-0927ND
2016-08-039590-012-0821ND
2016-08-049590-013-0826ND
2016-08-049590-063-0852ND
2016-08-049590-041-1259ND
2016-08-049590-028-1130ND
2016-08-049590-057-1209ND
2016-08-049590-027-1026ND
2016-08-049590-058-1128ND
2016-08-049590-042-1211ND
2016-08-049590-025-0923ND
2016-08-049590-059-1016ND
2016-08-049590-023-0955ND
2016-08-049590-062-0937ND
2016-08-049590-020-1102ND
2016-08-049590-061-1053ND
2016-08-049590-014-0848ND
2016-11-039590-039-1029ND
2016-11-049590-026-1147ND
2016-11-049590-003-0933ND
2016-11-119590-040-0913ND
2019-07-189590-041-1011ND
2019-08-069590-014-0816ND
2019-09-119590-033-1221ND
2019-09-119590-030-1246ND
2019-09-119590-035-1114ND
2019-09-119590-039-1041ND
2019-09-119590-040-1156ND
2019-09-129590-063-1049ND
2019-09-129590-062-1129ND
2019-09-129590-043-0917ND
2019-09-129590-058-1320ND
2019-09-129590-059-1353ND
2019-09-129590-042-1231ND
2019-09-129590-028-1228ND
2019-09-129590-027-1137ND
2019-09-129590-026-1031ND
2019-09-129590-025-1000ND
2019-09-129590-023-1109ND
2019-09-129590-020-1206ND
2019-09-129590-013-1008ND
2019-09-129590-012-0841ND
2019-09-129590-003-0930ND
2019-09-129590-002-0906ND
2019-09-129590-001-0843ND
2019-12-119590-061-1208ND