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EWG's Tap Water Database — 2021 UPDATE

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Styrene

East Bay Municipal Utility District

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.

 

44

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
2014ND60ND
2015ND80ND
2016ND70ND
2017ND110ND
2018ND60ND
2019ND60ND

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
2014-04-088201-011-0820ND
2014-04-238201-005-0720ND
2014-06-168201-009-0915ND
2014-06-178201-012-1030ND
2014-06-178201-004-0900ND
2014-09-108201-005-0905ND
2015-07-098201-005-0809ND
2015-07-158201-009-0750ND
2015-07-218201-011-0835ND
2015-07-218201-012-0850ND
2015-07-288201-004-1035ND
2015-07-308201-005-1212ND
2015-09-168201-012-0930ND
2015-12-168201-013-0955ND
2016-02-168201-013-0910ND
2016-06-138201-005-0815ND
2016-06-298201-004-0845ND
2016-06-308201-012-1155ND
2016-07-058201-005-0911ND
2016-07-128201-009-0900ND
2016-10-258201-011-0850ND
2017-02-018201-004-0830ND
2017-02-018201-012-0725ND
2017-02-228201-009-0850ND
2017-02-228201-013-0910ND
2017-02-228201-011-0855ND
2017-06-278201-012-0910ND
2017-06-278201-004-0810ND
2017-06-288201-005-0903ND
2017-07-208201-012-0802ND
2017-07-218201-012-0925ND
2017-07-268201-005-0913ND
2018-02-208201-009-0835ND
2018-07-248201-005-0905ND
2018-07-258201-012-0805ND
2018-07-268201-004-0755ND
2018-07-318201-005-1400ND
2018-10-168201-011-0818ND
2019-01-038201-011-0915ND
2019-06-188201-009-0940ND
2019-06-198201-012-0745ND
2019-06-198201-004-0835ND
2019-06-198201-005-1150ND
2019-07-168201-005-0820ND