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EWG's Tap Water Database — 2021 UPDATE

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Heptachlor epoxide

Waipahu-Ewa-Waianae

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

 

149

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND940ND
2015ND110ND
2016ND20ND
2017ND380ND
2018ND10ND
2019ND30ND

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
2014-01-13201401150663ND
2014-01-13201401150663ND
2014-01-15201401170377ND
2014-01-15201401170388ND
2014-01-15201401170377ND
2014-01-15201401170388ND
2014-01-18201401220225ND
2014-01-18201401220226ND
2014-01-18201401220227ND
2014-01-18201401220228ND
2014-01-18201401220225ND
2014-01-18201401220226ND
2014-01-18201401220227ND
2014-01-18201401220228ND
2014-01-21201401230462ND
2014-01-21201401230463ND
2014-01-21201401230464ND
2014-01-21201401230465ND
2014-01-21201401230462ND
2014-01-21201401230463ND
2014-01-21201401230464ND
2014-01-21201401230465ND
2014-01-24201401280404ND
2014-01-24201401280405ND
2014-01-24201401280453ND
2014-01-24201401280404ND
2014-01-24201401280405ND
2014-01-24201401280453ND
2014-01-25201401280407ND
2014-01-25201401280407ND
2014-01-26201401280406ND
2014-01-26201401280432ND
2014-01-26201401280406ND
2014-01-26201401280432ND
2014-01-29201401310166ND
2014-01-29201401310166ND
2014-01-30201402010005ND
2014-01-30201402010005ND
2014-02-18201402200355ND
2014-02-18201402200355ND
2014-03-05201403070205ND
2014-03-05201403070205ND
2014-04-04201404080622ND
2014-04-04201404080786ND
2014-04-04201404080622ND
2014-04-04201404080786ND
2014-07-08201407100610ND
2014-07-08201407100610ND
2014-07-21201407230630ND
2014-07-21201407230630ND
2014-07-23201407250222ND
2014-07-23201407250456ND
2014-07-23201407250222ND
2014-07-23201407250456ND
2014-08-21C14-08-0143ND
2014-08-21C14-08-0144AND
2014-08-21C14-08-0143ND
2014-08-21C14-08-0144AND
2014-09-09C14-09-0029AND
2014-09-09C14-09-0030ND
2014-09-09C14-09-0029AND
2014-09-09C14-09-0030ND
2014-10-06201410090199ND
2014-10-06201410090199ND
2014-10-07201410090944ND
2014-10-07201410090944ND
2014-10-08201410100303ND
2014-10-08201410100304ND
2014-10-08201410100303ND
2014-10-08201410100304ND
2014-10-20201410220436ND
2014-10-20201410220439ND
2014-10-20201410220436ND
2014-10-20201410220439ND
2014-10-22201410240309ND
2014-10-22201410240310ND
2014-10-22201410240309ND
2014-10-22201410240310ND
2014-10-24201410280161ND
2014-10-24201410280161ND
2014-10-27201410290476ND
2014-10-27201410290477ND
2014-10-27201410290479ND
2014-10-27201410290481ND
2014-10-27201410290476ND
2014-10-27201410290477ND
2014-10-27201410290479ND
2014-10-27201410290481ND
2014-10-28201410300229ND
2014-10-28201410300231ND
2014-10-28201410300229ND
2014-10-28201410300231ND
2014-10-29201410310269ND
2014-10-29201410310269ND
2015-03-31201504020267ND
2015-04-21201504230309ND
2015-05-11201505130557ND
2015-05-26201505280356ND
2015-07-13201507150498ND
2015-08-31201509020193ND
2015-08-31201509020194ND
2015-09-29201510010224ND
2015-10-19201510090426ND
2015-11-30201512020821ND
2015-12-28201512180364ND
2016-11-14ND
2016-12-14ND
2017-01-09ND
2017-01-10ND
2017-01-10ND
2017-01-10ND
2017-01-11ND
2017-01-24ND
2017-01-24ND
2017-01-25ND
2017-01-26ND
2017-02-02ND
2017-02-08ND
2017-02-13ND
2017-02-13ND
2017-02-16ND
2017-02-22ND
2017-02-22ND
2017-02-23ND
2017-02-27ND
2017-03-14ND
2017-03-15ND
2017-10-09ND
2017-10-11ND
2017-10-13ND
2017-10-13ND
2017-10-16ND
2017-10-16ND
2017-10-16ND
2017-10-16ND
2017-10-17ND
2017-10-18ND
2017-10-18ND
2017-10-23ND
2017-10-24ND
2017-10-24ND
2017-10-24ND
2017-10-25ND
2017-10-25ND
2017-10-30ND
2018-08-21201808130257ND
2019-01-30201901310262ND
2019-04-08201904100407ND
2019-07-30201908010178ND