Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Hexachlorocyclopentadiene

Hilo

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

 

34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND80ND
2013N/A00N/A
2014ND80ND
2015N/A00N/A
2016ND80ND
2017ND100ND

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
2012-04-302012050030010S1ND
2012-04-302012050030010S2ND
2012-04-30201205030005ND
2012-04-30201205030017ND
2012-10-15201210170604ND
2012-10-15201210170563ND
2012-10-15201210170562ND
2012-10-15201210170553ND
2014-01-22C14-01-0067ND
2014-01-22C14-01-0066ND
2014-01-22C14-01-0065ND
2014-01-22C14-01-0064ND
2014-04-01C14-04-0098AND
2014-04-01C14-04-0099ND
2014-04-01C14-04-0100ND
2014-04-01C14-04-0101ND
2016-02-22ND
2016-02-22ND
2016-02-22ND
2016-02-22ND
2016-06-01ND
2016-06-01ND
2016-06-01ND
2016-06-01ND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-05-09ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-08-16ND