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EWG's Tap Water Database — 2019 UPDATE

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Styrene

City of Caldwell

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
2012N/A00N/A
2013ND30ND
2014ND30ND
2015ND30ND
2016ND130ND
2017N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2013-06-06V1324249ND
2013-06-11V1324841ND
2013-06-11V1324842ND
2014-06-18V1422594ND
2014-09-29V1438512ND
2014-11-13V1445335ND
2015-03-10V1509143ND
2015-05-06V1517379ND
2015-09-24V1541055ND
2016-10-12V1647132ND
2016-10-12V1647133ND
2016-10-12V1647134ND
2016-10-12V1647135ND
2016-10-12V1647131ND
2016-10-13V1647139ND
2016-10-13V1647138ND
2016-10-13V1647137ND
2016-10-13V1647136ND
2016-10-13V1647140ND
2016-10-13V1647142ND
2016-10-13V1647141ND
2016-10-19V1647952ND