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EWG's Tap Water Database — 2021 UPDATE

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Heptachlor epoxide

Lutcher Waterworks

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

MORE ABOUT THIS CONTAMINANT

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
2016ND40ND
2017ND40ND
2018ND20ND
2019ND60ND

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
2014-02-17AD89144ND
2014-02-17AD89144ND
2014-10-14AD98503ND
2014-10-14AD98503ND
2015-06-0835192498005ND
2015-06-0835192498005ND
2015-09-2935209762003ND
2015-09-2935209762003ND
2016-03-1635234654002ND
2016-03-1635234654002ND
2016-09-2035266509002ND
2016-09-2035266509002ND
2017-01-1835289822004ND
2017-01-1835289822004ND
2017-10-2435344091004ND
2017-10-2435344091004ND
2018-08-2335413208001ND
2018-08-2335413208001ND
2019-02-1235447884001ND
2019-02-1235447884001ND
2019-08-2135492540001ND
2019-08-2135492540001ND
2019-10-0335502712001ND
2019-10-0335502712001ND