Know Your Environment. Protect Your Health.

Styrene

High-tor Properties

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND30ND
2020ND50ND
2021ND30ND
2022ND60ND
2023ND20ND

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
2018-06-26DW-91133ND
2018-06-26DW-91135ND
2018-06-26DW-91131ND
2019-10-299101372-02ND
2019-10-299101372ND
2019-10-299101372-03ND
2020-05-060050163-03ND
2020-05-060050164-02VND
2020-05-060050164-01VND
2020-09-140090571-01VOCND
2020-11-100110439-02VND
2021-11-151110754-04ND
2021-11-151110754-02ND
2021-11-151110754-03ND
2022-01-24EHS2200009066-01ND
2022-01-24EHS2200004720-SR-2ND
2022-01-24EHS2200004719-01VOCND
2022-01-24EHS2200004720-01VOCND
2022-01-24EHS2200004717-01VOCND
2022-02-17EHS2200009066-SR-1ND
2023-09-2723I1769-01ND
2023-10-2723J1871-01ND