Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Styrene

Aqua Pa Uwchlan

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.

 

36

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2012-02-06AD37757ND
2012-02-06AD37758ND
2012-02-23AD39504ND
2012-02-23AD39503ND
2012-02-29AD39501ND
2012-05-25AD49447ND
2013-02-05AD79498ND
2013-02-05AD79499ND
2013-02-20AD80828ND
2013-02-20AD80829ND
2013-03-05AD82342ND
2013-05-21AD90752ND
2014-02-06AE22430ND
2014-02-14AE22385ND
2014-02-14AE22387ND
2014-02-21AE23946ND
2014-02-21AE23943ND
2014-04-23AE29861ND
2015-02-0312395469ND
2015-02-0312395553ND
2015-02-0312395511ND
2015-02-0312395532ND
2015-02-0412395448ND
2015-02-0412395490ND
2016-01-2213746230ND
2016-01-2213746251ND
2016-01-2213746272ND
2016-01-2213746293ND
2016-02-1013864197ND
2016-02-1013864218ND
2017-03-2815787970ND
2017-03-2815787991ND
2017-04-1915928777ND
2017-04-1915928735ND
2017-04-2115928756ND
2017-06-2116249821ND