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EWG's Tap Water Database — 2019 UPDATE

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Styrene

Shawano Co. Utility

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND40ND
2014ND40ND
20150.0300 ppb41ND - 0.120 ppb
2016ND40ND
2017ND40ND

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
2012-03-19654762ND
2012-06-18668386ND
2012-07-23674188ND
2012-11-06692768ND
2013-03-19710364ND
2013-05-21720578ND
2013-08-06735643ND
2013-10-22754118ND
2014-03-19775750ND
2014-04-15780543ND
2014-08-19811520ND
2014-11-18832018ND
2015-03-17848835ND
2015-06-158657050.120 ppb
2015-09-08881303ND
2015-11-17894386ND
2016-02-16905511ND
2016-04-18916035ND
2016-08-09938143ND
2016-10-25955476ND
2017-03-06976137ND
2017-05-30994131ND
2017-09-111017363ND
2017-10-231025634ND