Know Your Environment. Protect Your Health.

Styrene

San Antonio Water Company

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND90ND
2020ND10ND
2021N/A00N/A
2022ND100ND
2023N/A00N/A

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
2019-07-16CA3610085_003_003-201907161305ND
2019-07-16CA3610085_017_017-201907161330ND
2019-07-16CA3610085_001_001-201907161100ND
2019-07-16CA3610085_013_013-201907161350ND
2019-07-16CA3610085_018_018-201907161130ND
2019-07-16CA3610085_002_002-201907161140ND
2019-07-16CA3610085_011_011-201907161250ND
2019-07-16CA3610085_016_016-201907161200ND
2019-07-17CA3610085_004_004-201907170800ND
2020-04-07CA3610085_021_021-202004071020ND
2022-07-20CA3610085_018_018-202207201300ND
2022-07-20CA3610085_011_011-202207201010ND
2022-07-20CA3610085_001_001-202207201200ND
2022-07-20CA3610085_013_013-202207201130ND
2022-07-20CA3610085_002_002-202207201230ND
2022-07-20CA3610085_004_004-202207200945ND
2022-07-20CA3610085_003_003-202207201030ND
2022-07-20CA3610085_017_017-202207201100ND
2022-07-21CA3610085_016_016-202207211030ND
2022-07-21CA3610085_021_021-202207210945ND