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EWG's Tap Water Database — 2019 UPDATE

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Styrene

Sierra Madre Water Department

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.

 

31

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND60ND
2014ND50ND
2015ND50ND
2016ND50ND
2017ND50ND

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
2012-05-079588-007-0915ND
2012-05-079588-006-0935ND
2012-05-079588-005-0840ND
2012-05-079588-004-0855ND
2012-05-079588-003-0830ND
2013-05-219588-007-1000ND
2013-05-219588-006-0940ND
2013-05-219588-005-0910ND
2013-05-219588-004-0925ND
2013-06-263761-003-0800ND
2013-06-279588-003-0805ND
2014-05-129588-007-1125ND
2014-05-129588-006-1055ND
2014-05-129588-005-1105ND
2014-05-129588-004-1045ND
2014-05-129588-003-1030ND
2015-05-139588-007-0840ND
2015-05-139588-006-1020ND
2015-05-139588-005-0940ND
2015-05-139588-004-1000ND
2015-05-139588-003-1115ND
2016-05-039588-007-0920ND
2016-05-039588-006-0900ND
2016-05-039588-005-0830ND
2016-05-039588-004-0845ND
2016-05-039588-003-0815ND
2017-05-039588-007-1010ND
2017-05-039588-006-0940ND
2017-05-039588-005-0930ND
2017-05-039588-004-1045ND
2017-05-039588-003-1030ND