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EWG's Tap Water Database — 2019 UPDATE

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Styrene

Montebello Land & 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.

 

37

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND70ND
2013ND70ND
2014ND70ND
2015ND30ND
2016ND60ND
2017ND70ND

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
2012-02-212706-001-1340ND
2012-02-212706-007-1350ND
2012-08-202706-009-1200ND
2012-08-202706-003-1130ND
2012-08-202706-008-1225ND
2012-08-202706-004-1215ND
2012-08-202706-005-1140ND
2013-02-252706-001-1000ND
2013-02-252706-007-1010ND
2013-08-122706-005-1230ND
2013-08-122706-003-1240ND
2013-08-122706-004-1220ND
2013-08-122706-008-1210ND
2013-08-122706-009-1255ND
2014-02-202706-007-1020ND
2014-02-202706-001-0955ND
2014-08-222706-004-1000ND
2014-08-222706-009-1145ND
2014-08-222706-005-1035ND
2014-08-222706-003-1015ND
2014-08-222706-008-1100ND
2015-02-192706-007-1205ND
2015-02-192706-001-1145ND
2015-11-242706-004-0950ND
2016-02-249588-007-1020ND
2016-03-119588-001-1015ND
2016-08-259588-008-0835ND
2016-08-259588-005-0820ND
2016-08-259588-003-0845ND
2016-11-229588-004-0850ND
2017-02-219588-007-0925ND
2017-02-219588-001-0900ND
2017-06-149588-009-1025ND
2017-08-309588-008-0850ND
2017-08-309588-005-0915ND
2017-08-309588-003-0905ND
2017-10-139588-004-0855ND