Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Styrene

Wellborn SUD

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
2012ND20ND
2013ND30ND
2014ND30ND
2015ND80ND
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
2012-06-18AB93093ND
2012-09-12AC00839ND
2013-09-23Q1307889005ND
2013-12-12Q1317624022ND
2013-12-12Q1317624030ND
2014-04-07AC49476ND
2014-04-07AC49474ND
2014-09-10AC66591ND
2015-03-24AC85862ND
2015-03-24AC85884ND
2015-03-24AC85872ND
2015-03-24AC85874ND
2015-03-24AC85864ND
2015-05-27AC93421ND
2015-09-30AD09128ND
2015-12-07AD15734ND
2016-03-09AD27935ND
2016-03-09AD27931ND
2016-03-09AD27937ND
2016-03-09AD27933ND
2017-03-07AD73764ND
2017-03-07AD73762ND
2017-11-21AE05570ND
2017-11-21AE05566ND