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EWG's Tap Water Database — 2019 UPDATE

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Hexachlorocyclopentadiene

Philadelphia Water Department

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2012-04-306635466ND
2012-04-306635464ND
2012-04-306635465ND
2013-05-151027470001ND
2013-05-151027470003ND
2013-05-151027470002ND
2014-04-077422122ND
2014-04-077422120ND
2014-04-077422118ND
2014-08-197572176ND
2014-08-197572174ND
2014-08-197572178ND
2015-06-1012888365ND
2015-06-1012888317ND
2015-06-1012888341ND
2016-06-0314411778ND
2016-06-0314411753ND
2016-06-0314411728ND
2017-05-1616101007ND
2017-05-1616100982ND
2017-05-1616100957ND
2017-07-2416420645ND
2017-07-2416420620ND
2017-07-2416420595ND