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EWG's Tap Water Database — 2019 UPDATE

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Cyanide

City of Sugar Land

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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
201474.0 ppb101020.0 ppb - 160.0 ppb
2015ND40ND
201642.5 ppb42ND - 130.0 ppb
201746.7 ppb95ND - 130.0 ppb

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
2014-02-11AC42131160.0 ppb
2014-03-26AC4830720.0 ppb
2014-03-26AC4829960.0 ppb
2014-03-26AC4829520.0 ppb
2014-03-26AC4829850.0 ppb
2014-03-26AC4829650.0 ppb
2014-03-26AC4829120.0 ppb
2014-04-29AC51978100.0 ppb
2014-07-23AC60651120.0 ppb
2014-10-14AC69555140.0 ppb
2015-01-22AC77291ND
2015-04-01AC86903ND
2015-07-16AC99848ND
2015-11-04AD12513ND
2016-02-02AD21358ND
2016-04-19AD33546ND
2016-09-01AD4761340.0 ppb
2016-10-05AD52517130.0 ppb
2017-01-04AD62918120.0 ppb
2017-03-22AD76253ND
2017-03-22AD7625160.0 ppb
2017-03-22AD7625020.0 ppb
2017-03-22AD76252ND
2017-04-03AD77966ND
2017-04-03AD77965ND
2017-07-05AD88262130.0 ppb
2017-10-02AD9872990.0 ppb