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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor epoxide

Camelot S/d

Heptachlor epoxide is a breakdown product of heptachlor, a highly toxic and carcinogenic pesticide banned in the U.S. since the 1980s.

 

19

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.0203 ppb52ND - 0.0559 ppb
20130.0732 ppb110.0732 ppb
20140.0495 ppb110.0495 ppb
20150.0258 ppb73ND - 0.0700 ppb
20160.0665 ppb440.0470 ppb - 0.0840 ppb
20170.0590 ppb110.0590 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.006 ppb

The EWG Health Guideline of 0.006 ppb for heptachlor epoxide 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 cancer.

EPA Maximum Contaminant
Level (MCL) 0.2 ppb

The legal limit for heptachlor epoxide, established in 1991, was based on analytical detection limits at the time that the standard was set. This limit may not fully protect against the risk of cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2012-02-09C114736-020.0454 ppb
2012-02-09C114736-03ND
2012-02-09C114736-04ND
2012-02-23C201544-01RE1ND
2012-05-24C202388-010.0559 ppb
2013-04-17C302855-010.0732 ppb
2014-04-16C403041-010.0495 ppb
2015-01-08ND
2015-01-080.0553 ppb
2015-01-09ND
2015-01-09ND
2015-04-220.0550 ppb
2015-07-17ND
2015-11-160.0700 ppb
2016-01-06C515865-010.0470 ppb
2016-05-04CZ03197-010.0790 ppb
2016-08-10CZ08345-010.0840 ppb
2016-11-01CZ13755-010.0560 ppb
2017-01-25CZ18740-010.0590 ppb