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EWG's Tap Water Database — 2019 UPDATE

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Hexachlorocyclopentadiene

Exeter Water Department

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.0260 ppb51ND - 0.130 ppb
2013ND50ND
2014ND50ND
2015ND50ND
2016ND20ND
2017ND20ND

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
2012-01-041201-00041-001ND
2012-04-041204-00105-001ND
2012-08-081208-00321-001ND
2012-11-071211-00175-0010.130 ppb
2012-11-071211-00137-001ND
2013-01-16BD22617ND
2013-04-04BD56061ND
2013-07-18BF08887ND
2013-10-09BF53250ND
2013-10-09BF53251ND
2014-01-02BF95287ND
2014-04-03BG28085ND
2014-07-09133509.01ND
2014-10-09136708.01ND
2014-10-09136708.02ND
2015-01-08139651.01ND
2015-04-02141763.01ND
2015-07-16145750.01ND
2015-09-09147823.01ND
2015-11-04150030.01ND
2016-02-10152998.01ND
2016-07-13158246.01ND
2017-07-11170940.01ND
2017-10-11174517.01ND