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EWG's Tap Water Database — 2019 UPDATE

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Styrene

Town of Gilbert

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.

 

63

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND180ND
2013ND120ND
2014ND40ND
2015ND80ND
2016ND150ND
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
2012-01-09PVA0475-01ND
2012-01-18PVA1134-01VND
2012-02-06PVB0363-01ND
2012-02-28PVB1867-01END
2012-03-01PVC0073-01END
2012-03-15PVC1257-01ND
2012-04-02PVD0064-01VND
2012-04-09PVD0611-01VND
2012-04-18PVD1294-01CND
2012-05-02PVE0219-01VND
2012-07-02PVG0062-01RE1ND
2012-07-03PVG0185-01ND
2012-07-26PVG1876-01VND
2012-08-28PVH2122-01VND
2012-10-01PVJ0070-01ND
2012-10-01PVJ0064-01ND
2012-10-01PVJ0072-01ND
2012-12-20PVL1426-01ND
2013-01-28PWA1665-01VND
2013-02-26PWB1689-01VND
2013-04-24550-1401-1VND
2013-05-22550-3316-1ND
2013-07-01550-5830-1VND
2013-07-08550-6180-1VND
2013-07-30550-7716-1VND
2013-08-12550-8579-1VND
2013-08-26550-9435-1VND
2013-08-27550-9504-1VND
2013-11-04201311040082VND
2013-11-28201311280351VND
2014-01-27201401270065VND
2014-01-27201401270088VND
2014-02-11201402110338VND
2014-03-04201403040337VND
2015-01-28201501280363VND
2015-01-28201501260356VND
2015-02-11201502110487VND
2015-02-24201502240351VND
2015-05-13201505130228VND
2015-07-21201507220448VND
2015-10-12201510120090VND
2015-12-02201512020569VND
2016-01-05201601070012VND
2016-01-06201601070018VND
2016-01-12201601120205VND
2016-01-19201601190344VND
2016-01-19201601190338VND
2016-01-19201601200431VND
2016-01-26201601280342VND
2016-01-26201601260332VND
2016-02-08201602080054VND
2016-02-08201602080043VND
2016-02-17201602170379VND
2016-02-17201602170374VND
2016-03-02201603020442VND
2016-03-23201603230456VND
2016-05-31201605310476VND
2017-01-04201701040827VND
2017-01-17201701170328VND
2017-03-22201703220306VND
2017-06-06201706060728VND
2017-07-27201707280115VND
2017-10-04201710040638VND