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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor epoxide

Beauregard Water Works District #3

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

 

44

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND120ND
2013ND100ND
2014N/A00N/A
2015ND20ND
2016ND200ND
2017N/A00N/A

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
2012-06-193560137W12ND
2012-06-193560137W12ND
2012-11-05AD72984ND
2012-11-05AD72985ND
2012-11-05AD72986ND
2012-11-05AD72987ND
2012-11-05AD72988ND
2012-11-05AD72985ND
2012-11-05AD72984ND
2012-11-05AD72986ND
2012-11-05AD72987ND
2012-11-05AD72988ND
2013-01-14AD74761ND
2013-01-14AD74760ND
2013-01-14AD74759ND
2013-01-14AD74758ND
2013-01-14AD74757ND
2013-01-14AD74759ND
2013-01-14AD74760ND
2013-01-14AD74761ND
2013-01-14AD74757ND
2013-01-14AD74758ND
2015-03-0235177665002ND
2015-03-0235177665002ND
2016-01-1935225812001ND
2016-01-1935225812005ND
2016-01-1935225812004ND
2016-01-1935225812003ND
2016-01-1935225812002ND
2016-01-1935225812005ND
2016-01-1935225812002ND
2016-01-1935225812001ND
2016-01-1935225812003ND
2016-01-1935225812004ND
2016-02-0135227539002ND
2016-02-0135227539003ND
2016-02-0135227539004ND
2016-02-0135227539001ND
2016-02-0135227539001ND
2016-02-0135227539002ND
2016-02-0135227539003ND
2016-02-0135227539004ND
2016-05-0235242594004ND
2016-05-0235242594004ND