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EWG's Tap Water Database — 2019 UPDATE

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Hexachlorocyclopentadiene

City of San Diego

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

 

63

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013ND60ND
2014ND90ND
2015ND150ND
2016ND190ND
2017ND110ND

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
2012-12-119437-010-0000ND
2012-12-119437-006-0000ND
2012-12-139437-001-0000ND
2013-02-139437-010-0000ND
2013-02-139437-001-0000ND
2013-02-139437-006-0000ND
2013-07-099437-010-0000ND
2013-07-099437-006-0000ND
2013-07-099437-001-0000ND
2014-01-149437-010-0000ND
2014-01-149437-006-0000ND
2014-01-149437-001-0000ND
2014-04-089437-010-0000ND
2014-04-089437-006-0000ND
2014-04-089437-001-0000ND
2014-07-089437-010-0000ND
2014-07-089437-001-0000ND
2014-07-089437-006-0000ND
2015-04-149437-010-0000ND
2015-04-149437-001-0000ND
2015-04-149437-006-0000ND
2015-05-069437-001-0000ND
2015-05-069437-010-0000ND
2015-05-069437-006-0000ND
2015-07-149437-001-0000ND
2015-07-149437-010-0000ND
2015-07-149437-006-0000ND
2015-11-059437-006-0000ND
2015-11-059437-010-0000ND
2015-11-059437-001-0000ND
2015-11-189437-006-0000ND
2015-11-189437-001-0000ND
2015-11-189437-010-0000ND
2016-01-129437-001-0000ND
2016-01-129437-006-0000ND
2016-01-219437-010-0000ND
2016-02-089437-001-0000ND
2016-02-089437-006-0000ND
2016-02-089437-010-0000ND
2016-04-129437-010-0000ND
2016-04-129437-006-0000ND
2016-04-129437-001-0000ND
2016-05-049437-010-0000ND
2016-05-049437-006-0000ND
2016-05-049437-001-0000ND
2016-08-039437-006-0000ND
2016-10-119437-001-0000ND
2016-10-119437-010-0000ND
2016-10-119437-006-0000ND
2016-11-029437-001-0000ND
2016-11-029437-006-0000ND
2016-11-029437-010-0000ND
2017-01-109437-001-0000ND
2017-01-109437-010-0000ND
2017-01-109437-006-0000ND
2017-02-019437-001-0000ND
2017-02-019437-010-0000ND
2017-02-019437-006-0000ND
2017-05-039437-001-0000ND
2017-05-039437-010-0000ND
2017-05-039437-006-0000ND
2017-11-019437-001-0000ND
2017-11-019437-006-0000ND