Know Your Environment. Protect Your Health.

Styrene

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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
2018ND40ND
2019ND40ND
2020ND40ND
2021ND40ND
2022ND40ND
2023ND40ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-02-27AE08317ND
2018-06-14AE13736ND
2018-07-25AE15755ND
2018-10-10AE19481ND
2019-03-07AE26872ND
2019-06-13AE31970ND
2019-09-04AE36637ND
2019-11-13AE40146ND
2020-03-12AE46093ND
2020-05-27AE49083ND
2020-07-22AE51793ND
2020-10-21AE56198ND
2021-03-11AE62654ND
2021-05-26AE66572ND
2021-09-21AE72335ND
2021-10-20AE73728ND
2022-02-23AE79541ND
2022-04-20AE82474ND
2022-09-14AE89723ND
2022-10-18AE91740ND
2023-01-24AE95947ND
2023-04-18AF00389ND
2023-07-18AF05697ND
2023-10-17AF10284ND