Know Your Environment. Protect Your Health.

Styrene

Clayton Water Supply Corporation Plant 2

NOTE: Clayton Water Supply Corporation Plant 2 purchases water from City of Carthage which is required to test for styrene. Sample information shown below was taken by City of Carthage.

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND10ND
2022ND10ND
2023ND10ND

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

NOTE: Clayton Water Supply Corporation Plant 2 purchases water from City of Carthage which is required to test for styrene. Sample information shown below was taken by City of Carthage.

Date Lab ID Result
2018-08-23Q1833940002ND
2019-08-26Q1959262001ND
2020-09-22Q2037528001ND
2021-08-04Q2120439001ND
2022-08-22Q2224781001ND
2023-07-18Q2327981001ND