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EWG's Tap Water Database — 2019 UPDATE

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Styrene

City of Pocatello

Styrene is a volatile cancer-causing chemical used for manufacturing Styrofoam (polystyrene) and other plastics. Releases from industrial production sites and hazardous waste landfills cause styrene contamination in drinking water. Read More.

In addition to increasing the risk of cancer, styrene can also damage the liver and the nervous system. California set a public health goal for styrene in drinking water at 0.5 parts per billion. The federal Maximum Contaminant Level (MCL) allows up to 100 parts per billion of styrene in water, which is 200 times more than the California recommended level.

Click here to read more about carcinogenic VOCs.

 

65

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND90ND
2013ND160ND
2014ND80ND
2015ND80ND
2016ND160ND
2017ND80ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for styrene 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 cancer.

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for styrene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1970s. This limit may not fully protect against the risk of cancer due to styrene exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2012-10-02VI21001301ND
2012-10-02VI21001310ND
2012-10-02VI21001309ND
2012-10-02VI21001308ND
2012-10-02VI21001305ND
2012-10-02VI21001304ND
2012-10-02VI21001303ND
2012-10-02VI21001302ND
2012-10-11VI21007401ND
2013-09-18VI30917610ND
2013-09-18VI30917611ND
2013-09-18VI30917612ND
2013-09-18VI30917613ND
2013-09-18VI30917614ND
2013-09-18VI30917615ND
2013-09-18VI30917616ND
2013-09-18VI30917609ND
2013-09-18VI30917608ND
2013-09-18VI30917601ND
2013-09-18VI30917602ND
2013-09-18VI30917603ND
2013-09-18VI30917604ND
2013-09-18VI30917605ND
2013-09-18VI30917606ND
2013-09-18VI30917607ND
2014-04-30VI40413001ND
2014-09-09VI40907907ND
2014-09-09VI40907906ND
2014-09-09VI40907905ND
2014-09-09VI40907904ND
2014-09-09VI40907903ND
2014-09-09VI40907902ND
2014-09-09VI40907901ND
2015-09-10VI50906404ND
2015-09-10VI50906403ND
2015-09-10VI50906402ND
2015-09-10VI50906401ND
2015-09-10VI50906304ND
2015-09-10VI50906303ND
2015-09-10VI50906302ND
2015-09-10VI50906301ND
2016-10-17VI61012209ND
2016-10-17VI61012210ND
2016-10-17VI61012211ND
2016-10-17VI61012212ND
2016-10-17VI61012213ND
2016-10-17VI61012215ND
2016-10-17VI61012216ND
2016-10-17VI61012208ND
2016-10-17VI61012207ND
2016-10-17VI61012206ND
2016-10-17VI61012205ND
2016-10-17VI61012204ND
2016-10-17VI61012203ND
2016-10-17VI61012202ND
2016-10-17VI61012201ND
2016-10-18VI61013201ND
2017-10-04VI71004902ND
2017-10-04VI71004903ND
2017-10-04VI71004904ND
2017-10-04VI71004905ND
2017-10-04VI71004906ND
2017-10-05VI71004907ND
2017-10-05VI71004901ND
2017-10-05VI71004908ND