Know Your Environment. Protect Your Health.

Styrene

Nocona Hills Water Supply Corporation

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2018-12-10Q1850817001ND
2018-12-10Q1850817004ND
2019-02-20Q1907488002ND
2019-02-20Q1907488007ND
2020-09-21Q2037478001ND
2020-09-21Q2037478003ND
2021-06-21Q2116016005ND
2021-06-21Q2116016007ND
2022-05-10Q2213917001ND
2022-05-10Q2213917003ND
2023-07-05Q2326100006ND
2023-07-05Q2326100008ND
2023-10-03Q2342315001ND