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EWG's Tap Water Database — 2019 UPDATE

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Styrene

Penn State Univ.

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.

 

168

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND340ND
2013ND280ND
2014ND140ND
2015ND350ND
2016ND270ND
2017ND300ND

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
2012-01-112A11054ND
2012-01-112A11055ND
2012-01-112A11054ND
2012-02-162B16056ND
2012-02-162B16062ND
2012-02-162B16056ND
2012-03-152C15113ND
2012-03-152C15114ND
2012-03-152C15113ND
2012-04-102D10034ND
2012-04-102D10032ND
2012-04-102D10034ND
2012-05-162E16047ND
2012-05-162E16052ND
2012-06-132F13082ND
2012-06-132F13085ND
2012-07-182G18164ND
2012-07-182G18165ND
2012-07-182G18164ND
2012-08-142H14056ND
2012-08-142H14056ND
2012-08-142H14056ND
2012-09-132I14008ND
2012-09-132I14008ND
2012-09-132I14008ND
2012-10-102J11011ND
2012-10-102J11013ND
2012-10-102J11011ND
2012-11-142K14103ND
2012-11-142K14103ND
2012-11-142K14103ND
2012-12-122L12132ND
2012-12-122L12141ND
2012-12-122L12132ND
2013-01-163A16080ND
2013-01-163A16077ND
2013-02-133B13070ND
2013-02-133B13069ND
2013-03-143C14062ND
2013-03-143C14067ND
2013-04-163D16078ND
2013-04-163D16079ND
2013-05-143E14110ND
2013-05-143E14111ND
2013-06-193F19020ND
2013-06-193F19038ND
2013-06-283F28065ND
2013-07-163G16031ND
2013-07-163G16034ND
2013-08-143H14065ND
2013-08-143H14088ND
2013-09-183I18061ND
2013-09-183I18062ND
2013-09-183I18061ND
2013-10-163J16032ND
2013-10-163J16040ND
2013-10-163J16032ND
2013-11-193K19048-06ND
2013-11-193K19040-06ND
2013-12-123L12046-07ND
2013-12-123L12104-06ND
2013-12-123L12046-06ND
2014-01-234A23025-07ND
2014-01-234A23033-06ND
2014-01-234A23025-06ND
2014-02-204B20042-07ND
2014-02-204B20041-07ND
2014-02-204B20042-06ND
2014-03-114C11016-07ND
2014-03-114C11027-07ND
2014-03-114C11016-06ND
2014-04-094D09031-01ND
2014-04-094D09036-01ND
2014-04-094D09037-01ND
2014-06-114F11107-05ND
2014-06-114F11107-04ND
2015-01-2113561257ND
2015-01-2113561280ND
2015-01-2113561258ND
2015-02-1713561341ND
2015-02-1713561301ND
2015-02-1713561342ND
2015-03-1713561383ND
2015-03-1713561384ND
2015-03-1813561406ND
2015-04-2813561447ND
2015-04-2813561446ND
2015-05-2013561509ND
2015-05-2013561469ND
2015-05-2013561510ND
2015-06-1713561572ND
2015-06-1713561532ND
2015-06-1713561573ND
2015-07-1413561614ND
2015-07-1413561637ND
2015-07-1413561615ND
2015-08-1213561699ND
2015-08-1213561658ND
2015-08-1213561698ND
2015-09-1613561761ND
2015-09-1613561721ND
2015-09-1613561762ND
2015-10-1513561803ND
2015-10-1513561826ND
2015-10-1513561804ND
2015-11-1113561193ND
2015-11-1113561169ND
2015-11-1113561217ND
2015-12-1013681496ND
2015-12-1013681522ND
2015-12-1013681497ND
2016-01-2613801561ND
2016-01-2613801513ND
2016-01-2613801537ND
2016-02-2313917121ND
2016-02-2313917075ND
2016-02-2313917122ND
2016-03-1614032234ND
2016-03-1614032211ND
2016-03-1614032188ND
2016-04-2014163607ND
2016-04-2014163561ND
2016-04-2014163608ND
2016-05-1814312915ND
2016-05-1814312941ND
2016-05-1814312916ND
2016-06-2114471240ND
2016-06-2114471267ND
2016-06-2114471241ND
2016-07-1914636482ND
2016-07-1914636434ND
2016-07-1914636483ND
2016-08-2314804541ND
2016-08-2314804491ND
2016-08-2314804516ND
2016-09-2814975898ND
2016-09-2814975925ND
2016-09-2814975899ND
2017-01-1715573254ND
2017-01-1715573255ND
2017-01-1815573207ND
2017-02-2315709667ND
2017-02-2315709668ND
2017-03-1315850544ND
2017-03-2315850711ND
2017-03-2815850839ND
2017-04-1816001597ND
2017-04-1816001598ND
2017-06-2816321155ND
2017-06-2816321156ND
2017-07-1216473298ND
2017-07-1216473421ND
2017-07-1216473422ND
2017-07-1216473423ND
2017-07-1216473424ND
2017-07-1216473425ND
2017-07-1216473426ND
2017-08-0316629373ND
2017-09-2016787344ND
2017-10-3116937436ND
2017-11-2617077338ND
2017-11-2617077339ND
2017-11-2617077340ND
2017-11-2617077341ND
2017-11-2617077342ND
2017-11-2617077343ND
2017-11-3017077375ND
2017-12-1917217483ND