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EWG's Tap Water Database — 2019 UPDATE

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Styrene

City of Stuart - Water Plant

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.

 

64

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND50ND
2014ND60ND
2015ND40ND
2016ND50ND
2017ND400ND

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 Result
2012-03-05ND
2012-06-06ND
2012-07-11ND
2012-10-12ND
2013-04-04ND
2013-06-14ND
2013-06-14ND
2013-08-27ND
2013-10-24ND
2014-01-07ND
2014-04-04ND
2014-07-07ND
2014-08-15ND
2014-11-04ND
2014-12-16ND
2015-01-07ND
2015-04-01ND
2015-09-24ND
2015-12-24ND
2016-01-07ND
2016-04-11ND
2016-06-03ND
2016-07-26ND
2016-10-19ND
2017-01-17ND
2017-04-04ND
2017-07-27ND
2017-08-23ND
2017-08-23ND
2017-08-23ND
2017-08-23ND
2017-08-23ND
2017-08-23ND
2017-08-23ND
2017-08-23ND
2017-09-21ND
2017-09-27ND
2017-09-27ND
2017-09-27ND
2017-09-27ND
2017-09-27ND
2017-09-27ND
2017-09-27ND
2017-09-27ND
2017-10-20ND
2017-11-22ND
2017-11-22ND
2017-11-22ND
2017-11-22ND
2017-11-22ND
2017-11-22ND
2017-11-22ND
2017-11-22ND
2017-11-22ND
2017-11-22ND
2017-12-06ND
2017-12-06ND
2017-12-06ND
2017-12-06ND
2017-12-06ND
2017-12-06ND
2017-12-06ND
2017-12-06ND
2017-12-06ND