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EWG's Tap Water Database — 2019 UPDATE

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Hexachlorocyclopentadiene

City of San Benito

Hexachlorocyclopentadiene was historically used for the manufacture of currently banned pesticides, such as endrin, dieldrin and chlordane. Itís still used for production of flame retardants, resins and plastics.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND40ND
2014ND20ND
2015ND10ND
2016ND10ND
2017ND10ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 2 ppb

The EWG Health Guideline of 2 ppb for hexachlorocyclopentadiene 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 harm to the stomach and intestines.

EPA Maximum Contaminant
Level (MCL) 50 ppb

The legal limit for hexachlorocyclopentadiene, established in 1992, was based on a toxicity study in laboratory animals conducted in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2012-01-111201250003ND
2012-04-101204235004ND
2012-04-101204235003ND
2012-07-181207811001ND
2012-12-05AC06244ND
2013-01-16AC08039ND
2013-04-02AC15556ND
2013-04-02AC15554ND
2013-07-09AC24179ND
2014-03-05AC45755ND
2014-06-03AC55828ND
2015-03-18AC85138ND
2016-03-08AD27719ND
2017-03-15AD75281ND